Tagenocrinus and Lecocrinus Two New Flexible Crinoid Genera from the Silurian and Devonian of North America

Tagenocrinus conradae n.gen., n.sp., is the first species of the flexible crinoid family Nipterocrinidae to be described from the Middle Devonian (Givetian). Tagenocrinus is characterized by a low bowl-shaped cup and a pentagonal radianal that contacts the infrabasal circlet. The establishment of Ta...

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Veröffentlicht in:	Journal of paleontology 1981-09, Vol.55 (5), p.1103-1108
1. Verfasser:	McIntosh, George C.
Format:	Artikel
Sprache:	eng
Schlagworte:	Biological taxonomies Echinoderms Frasnian age Genera Holotypes Paleontology Paratypes Scars Shales
Online-Zugang:	Volltext
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