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Goniasteridae : ウィキペディア英語版 | Goniasteridae
Goniasteridae are the largest family of sea stars, included in the ordo Valvatida. == Description ==
Goniasteridae are usually middle-sized sea stars with a characteristic double range of marginal plates bordering the disk and arms. Most of them have 5 arms, often short and triangular, around a broad central disc ; lots of species are pentagonal or subpentagonal (hence the name of the family). The aboral face is often covered with tiny spines looking like paxillae. Pedicellariae are often valvate, and the gonads are located at the interradius. Main identification keys for this group include the presence of paxillae, granules, teeth, spines, or the shape and dimensions of marginal plate.
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「Goniasteridae」の詳細全文を読む
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