出典:Wikipedia
出典:『Wikipedia』 (2010/08/24 18:39 UTC 版)
SIPHONODENDRON was a common colonial rugose (‘wrinkled’) coral of Carboniferous times. In fossil form it now appears as a white or brownish mass of short spaghetti-like threads, usually more or less flattened during subsequent distortion of the embedding limestone. It is included in the sub-class Hexacorallia – corals with sixfold symmetry.