Unusual ambulacral branching pattern in a new Ordovician giant edrioasteroid, Bizarroglobus
作者： Colin D. Sumrall , James Sprinkle
DOI: 10.1017/JPA.2014.30
关键词:
摘要: An unusual, new, giant edrioasteroid Bizarroglobus medusae n. gen. sp. is described from the Middle Ordovician Kanosh Shale of west-central Utah. This species has a pattern ambulacral branching with side ambulacra arising alternately main trunk, previously undocumented in edrioasteroids. interpreted as strategy for allometrically increasing feeding surface during ontogeny. further differs other isorophid edrioasteroids plating peripheral rim, and presence pores interambulacral plates primarily along edges ambulacra.
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