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・ Rapid eye movement sleep
・ Rapid eye movement sleep behavior disorder
・ Raphidovirus
・ Raphie Etgar
・ Raphiglossa
・ Raphiglossoides
・ Raphignathoidea
・ Raphimetopus
・ Raphimetopus ablutella
・ Raphimetopus incarnatella
・ Raphimetopus nitidicostella
・ Raphimetopus spinifrontella
・ Raphinae
・ Raphine, Virginia
・ Raphionacme
Raphiophoridae
・ Raphipeza
・ Raphiptera
・ Raphiscopa
・ Raphistemma
・ Raphistomatidae
・ Raphitoma
・ Raphitoma aequalis
・ Raphitoma alternans
・ Raphitoma arnoldi
・ Raphitoma asperrima
・ Raphitoma atropurpurea
・ Raphitoma bedoyai
・ Raphitoma bernardoi
・ Raphitoma bicolor


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Raphiophoridae : ウィキペディア英語版
Raphiophoridae

Raphiophoridae is a family of small to average size trilobites that first occurred at the start of the Ordovician and went extinct at the end of the Middle Silurian.
== Anatomy ==
All Raphiophorids are blind, with headshields (or cephalons) that are triangular to subcircular, many carrying long trailing genal spines, a forward directed rapier-like spine on the central raised area (or glabella) or both, with the glabella often inflated and the natural fracture lines (or sutures) of the cephalon coinciding with its margin. Thorax with 7 to 5 segments (except for ''Taklamakania'', ''Pseudampyxina'' and ''Nanshanaspis'' that have only 3).

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「Raphiophoridae」の詳細全文を読む



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