Pentacoenia
Orbigny, 1850, p. 92
Type Species
Pentacoenia elegantula d’Orbigny, 1850: 92; Subsequent Designation Wells, 1936: 123
Type Specimen: Holotype; R06761; Verified; Unknown
Type Locality: Lower Hauterivian of France (Fontenoy, Yonne).
Classification
Diagnosis
Like Cryptocoenia but occurrence of pentameral symmetry of septa is not restricted to juvenile corallites.
Remarks
Recent re-study of the holotype of the type species of Cryptocoenia d'Orbigny (Cryptocoenia alveolata [Goldfuss]) by Baron-Szabo (2002, p. 184, pl. 127, fig. 5) revealed that it showed the following characteristics: Colonial, massive, plocoid; gemmation extracalicinal; costosepta compact, confluent to nonconfluent, arranged in varying systems (in juvenile stages 5 and 6; in adult stages 6 and 8), finely granulated laterally; columella absent; wall parathecal to septoparathecal; endothecal dissepiments vesicular to subtabulate. Because in Pentacoenia all these characteristic are present with the exception that the occurrence of pentameral symmetry of septa does not seem to be restricted to juvenile corallites, Pentacoenia is considered a subgenus of Cryptocoenia.
Distribution
- Southern Europe; Early Cretaceous
- Central Europe; Early Cretaceous
- Eastern Europe; Early Cretaceous
- Central Europe; Late Cretaceous
This page has been in preparation since 02-Jun-2007 12:36
This version was contributed by Rosemarie Baron-Szabo on 02-Sep-2010 16:16.
Page authors are: Rosemarie Baron-Szabo. Please contact the editor if you would like to contribute to the diagnosis of this taxon.
The editor is: Rosemarie Baron-Szabo
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