摘要:

ABSTRACTIn part 2, 10 genera (1 new) and 24 species (7 new, 4 unnamed) of dichoporite Rhombifera, and a recently discovered new species of diploporite cystpid are described. Dichoporites occur from the Tremadoc to the Ashgill, but are only common in the Upper Ordovician. All dichoporites have well-developed stems, but while glyptocystitids were free-living as adults, hemicosmitids were attached, high-level suspension feeders with pinnate arms. Dichoporites have a fixed pattern of thecal plates. They passed sea water through their rhombs for respiratory gas exchange.

ISSN:0269-3445    

DOI:10.1080/25761900.2022.12131748

出版商:Taylor&Francis    

年代:1982

数据来源: Taylor