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・ Pteralyxia laurifolia
・ Pterandra
・ Pterandra isthmica
・ Pteranodon
・ Pteranodontidae
・ Pteranodontoidea
・ Pterapherapteryx
・ Pterapherapteryx sexalata
・ Pterarene
・ Pterarene sakashitai
・ Pteraspidiformes
・ Pteraspidomorphi
・ Pteraspis
・ Pteraster militaris
・ Pteraster tesselatus
Pterasteridae
・ Pterastheniinae
・ Pteredoa
・ Pterelaus
・ Ptereleotris
・ Ptereleotris evides
・ Ptereleotris hanae
・ Ptereleotris zebra
・ Pterengraulis atherinoides
・ Pterhemia
・ Pteri
・ Pteria
・ Pteria (Cappadocia)
・ Pteria (genus)
・ Pteria colymbus


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

Pterasteridae is a family of sea stars in the order Velatida, consisting of eight genera.
== Description and characteristics ==
Pterasterids are primarily deep-water, and have an inflated aboral surface. Like many other members of the ordo Velatida, they have a hole in the middle of the central disc called "osculum", from which they can expel mucus for defending against predators.
Many species brood their young in an internal chamber flushed with seawater.
Fossil pterasterids have been found as early as the upper Campanian of the Cretaceous period.

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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