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''Rhynchactis''''' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.
''Rhynchactis'' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.
The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.
==Taxonomy and phylogeny==
British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.〔Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010.〕 The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.〔
In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.〔Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「'''''Rhynchactis''''' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.」の詳細全文を読む
'Rhynchactis'' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.
''Rhynchactis'' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.
The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.
==Taxonomy and phylogeny==
British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.〔Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010.〕 The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.〔
In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.〔Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「'''''Rhynchactis''''' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.」の詳細全文を読む
' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.
''Rhynchactis'' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.
The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.
==Taxonomy and phylogeny==
British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.〔Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010.〕 The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.〔
In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.〔Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「'''''Rhynchactis''''' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.」の詳細全文を読む
'Rhynchactis'' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.">ウィキペディア（Wikipedia）』
■ウィキペディアで「'''''Rhynchactis''''' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.」の詳細全文を読む
' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.">ウィキペディア（Wikipedia）』
■ウィキペディアで「'''''Rhynchactis''''' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.」の詳細全文を読む
'Rhynchactis'' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.">ウィキペディアで「'''''Rhynchactis''''' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.」の詳細全文を読む
' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.">ウィキペディアで「''Rhynchactis''''' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.」の詳細全文を読む
'Rhynchactis'' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.」の詳細全文を読む
' is a genus of deep-sea anglerfish in the family Gigantactinidae, containing three species found worldwide at depths greater than . Adult female ''Rhynchactis'' reach a standard length (SL) of and have a dark-colored, streamlined body and a relatively small head bearing a very long illicium (the "fishing rod" formed by the first ray of the dorsal fin). Unlike almost all other deep-sea anglerfishes, the illicium bears no bioluminescent esca (the "lure") at the tip. The mouth is almost devoid of teeth, and the inside of both jaws are covered by numerous white glands that are unique to this genus.The lack of an esca, greatly reduced dentition, and glands inside the mouth all point to ''Rhynchactis'' having a highly specialized mode of feeding, the nature of which has yet to be deciphered. As in other deep-sea anglerfishes, there is enormous sexual dimorphism with males being much smaller than females and lacking an illicium, though they do not appear to be parasitic as in some families. Reproduction is oviparous, with the larvae having a rounded shape and enlarged pectoral fins.==Taxonomy and phylogeny==British ichthyologist coined the genus ''Rhynchactis'' and described its first species, ''R. leptonema'', in a 1925 issue of ''Annals and Magazine of Natural History''.Eschmeyer, W. N. (ed.) (''Rhynchactis'' ). Catalog of Fishes electronic version (February 19, 2010). Retrieved on March 29, 2010. The generic name comes from the Greek ''rhynchos'' ("snout") and ''aktis'' ("ray"), while the specific epithet comes from the Greek ''leptos'' ("thin") and ''nema'' ("thread"). Regan based his account on a single metamorphosed female collected by the research vessel ''Dana'' in the western central Atlantic.In 1998, Erik Bertelsen and Theodore Pietsch published a revision of the genus in the scientific journal ''Copeia'' and recognized two new species: ''R. macrothrix'' and ''R. microthrix''. These two specific epithets are derived from the Greek ''makros'' ("long"), ''mikros'' ("small"), and ''thrix'' ("hairs"), both referring to characteristics of the illicium. ''Rhynchatis'' is the more derived genus in its family, exhibiting the secondary reduction of many morphological elements such as bones, fin rays, and teeth.Pietsch, T.W. (2005). (Gigantactinidae. Whipnose Seadevils ). The Tree of Life Web Project. Retrieved on March 29, 1010.」の詳細全文を読む
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