Paraplacocoenia
Beauvais, 1982
Paraplacocoenia Beauvais, 1982 is a junior synonym (available and invalid), see Placocaeniopsis Alloiteau, 1952, p. 641.
Type Species
Placocoenia orbignyana Reuss, 1854: 99; Original Designation Beauvais, 1982: vol. 1, p. 114
Type Specimen: Holotype; unknown; Not Traced; Unknown
Type Locality: Coniacian to Lower Santonian of Austria (Gosau Group at Edelbachgraben).
Classification
Synonyms
Diagnosis
Colonial, massive or knobby, plocoid. Gemmation due to extracalicinal budding. Corallites united by a granulate peritheca. Costosepta radial, granular laterally, compact, in the costal area dissociating into trabecular structures. Septal margins beaded. Peritheca tabulo-columnar. Small trabecular–lamellar columella. Endothecal dissepiments thin and subtabulate, abundant. Wall septoparathecal. Septal microstructure consisting of simple trabeculae forming dark axial lines.
Remarks
In many respects the genus Paraplacocoenia Beauvais resembles the genus Haldonia. However, very granulate peritheca, dissociating into trabecular structures in the costal area and a lamellar columella are present in Paraplacocoenia but not in Haldonia. Furthermore, based on closely corresponding features, the genus Paraplacocoenia was merged with the Neocoenia as the subgenus of the latter (Baron-Szabo, 2014). Also see information under Hyndophorposis Soehle, 1899.
This page has been in preparation since 02-Jun-2007 12:36
This version was contributed by Rosemarie Baron-Szabo on 05-May-2017 14:56.
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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