|
''Asprella'' was a genus of sea snails, marine gastropod mollusks in the family Conidae, the cone snails and their allies. In the new classification of the family Conidae by Puillandre N., Duda T.F., Meyer C., Olivera B.M. & Bouchet P. (2015), ''Asprella'' has become a subgenus of ''Conus'': ''Conus (Asprella)'' Monterosato, 1923 (type species: ''Conus asper'' Lamarck, 1810 ) represented as ''Conus'' Thiele, 1929 〔 ( Puillandre N., Duda T.F., Meyer C., Olivera B.M. & Bouchet P. (2015). ''One, four or 100 genera? A new classification of the cone snails''. Journal of Molluscan Studies. 81: 1-23 ) 〕 ==Distinguishing characteristics== The Tucker & Tenorio 2009 taxonomy distinguishes ''Asprella'' from ''Conus'' in the following ways:〔Tucker J.K. & Tenorio M.J. (2009), Systematic Classification of Recent and Fossil Conoidean Gastropods, ConchBooks, Hankenheim, Germany, 295 pp.〕 * Genus ''Conus'', ''sensu stricto'', Linnaeus, 1758 :Shell characters (living and fossil species) ::The basic shell shape is conical to elongated conical, has a deep anal notch on the shoulder, a smooth periostracum and a small operculum. The shoulder of the shell is usually nodulose and the protoconch is usually multispiral. Markings often include the presence of tents except for black or white color variants, with the absence of spiral lines of minute tents and textile bars. :Radular tooth (not known for fossil species) ::The radula has an elongated anterior section with serrations and a large exposed terminating cusp, a non-obvious waist, blade is either small or absent and has a short barb, and lacks a basal spur. :Geographical distribution: ::These species are found in the Indo-Pacific region. :Feeding habits: ::These species eat other gastropods, including cones.〔 * Genus ''Asprella'', Schaufuss, 1869 :Shell characters (living and fossil species) ::The protoconch is multispiral, the body ornamentation reaches the shoulder of the shell or dissipates in the midbody region, and there are nodules on at least the early whorls. The shell has as a deep anal notch. The periostracum is smooth however in some species there are minute hairs, and the operculum is small. :Radular tooth (not known for fossil species) ::The anterior section of the radula is approximately the same length as the posterior section but in some species one section may be longer than the other. The blade is long and extends between one-third and two-thirds the length of the anterior section of the radular tooth. A basal spur is present, and the barb is short. :Geographical distribution: ::These species are found throughout the Indo-Pacific region to and including Australia. :Feeding habits: ::These species are vermivorous (i.e. they prey on marine worms).〔 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「Asprella」の詳細全文を読む スポンサード リンク
|