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・ Acantholycosa paraplumalis
・ Acantholycosa pedestris
・ Acantholycosa petrophila
・ Acantholycosa plumalis
・ Acantholycosa sayanensis
・ Acanthoderes septemmaculata
・ Acanthoderes solisi
・ Acanthoderes subtessellata
・ Acanthoderes thammi
・ Acanthoderes thoracica
・ Acanthoderes virescens
・ Acanthoderes wappesi
・ Acanthoderes zischkai
・ Acanthoderes zonata
・ Acanthoderini
Acanthodes
・ Acanthodesmos
・ Acanthodica
・ Acanthodica albiplena
・ Acanthodica cabra
・ Acanthodica chiripa
・ Acanthodica coelebs
・ Acanthodica daunus
・ Acanthodica drucei
・ Acanthodica emittens
・ Acanthodica fassli
・ Acanthodica fosteri
・ Acanthodica frigida
・ Acanthodica grandis
・ Acanthodica hages


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Acanthodes : ウィキペディア英語版
Acanthodes

''Acanthodes'' (meaning ''spiny base'' or ''thorny base'') is an extinct genus of spiny shark. Fossils have been found in Europe, North America, and Australia.
==Description==
Compared with other spiny sharks, ''Acanthodes'' was relatively large, at long. The genus had no teeth, instead gills. Because of this, it is presumed to have been a filter feeder, filtering plankton from the water.〔 The Acanthodes has been found to have only a couple of skull bones. It was covered in scales that were cubical in shape.
It also had fewer spines than many of its relatives. Each of the paired pectoral and pelvic fins had a spine, as did the single anal and dorsal fins, giving it a total of just six, less than half that of many other species.+
A fossil discovered near Hamilton, Kansas in the Upper Carboniferous Hamilton Formation, and published in 2014 as ''Acanthodes bridgei '' was so well-preserved that traces of its eye tissue were sufficient to establish that ''Acanthodes'' had both rod and cone photoreceptor cells, and thus profited from color vision.〔(NewsScienceMag, "Three hundred million year old fossil fish still has traces of eye tissue" ), 23 December 2014: accessed 23 December 2014.〕

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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