Brachymeandra
Alloiteau, 1957
Type Species
Brachymeandra delphinensis Alloiteau, 1957: 292; Original Designation Alloiteau, 1957: 292
Type Specimen: Holotype; ; Not Traced; Unknown
Type Locality: Upper Turonian of France (Uchaux).
The holotype of the type species is housed at MNHN (Paris) under A29447.
Synonyms
Diagnosis
Colonial, massive, thamnasterioid, plocoid to submeandroid superficially. Budding intracalicular. Costosepta subcompact, subconfluent or confluent. Marginally beaded, finely granulated laterally. Columella parietal-papillose. Paliform structures present. Synapticulae abundant. Endothecal dissepiments thin, subtabulate. Perithecal wall can be present. Generally no wall between the calices.
Remarks
Based on the species Adelastraea leptophylla Reuss, 1854, M. Beauvais (1982, vol. 2, p. 47) created the genus Brachycoenia, which differs only slightly from the genus Brachymeandra Alloiteau. Beauvais mentioned the existence of paliform structures in Brachymeandra as the main difference between the two genera. However, later investigations of the type material of Brachycoenia (Baron-Szabo, 2002 and 2003) revealed the occasional existence of paliform structures. Therefore, the separation of these taxa does not seem justified.
This page has been in preparation since 02-Jun-2007 12:35
This version was contributed by Rosemarie Baron-Szabo on 09-Mar-2016 14:12.
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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