Trigerastraea
Alloiteau, 1952, p. 659
Type Species
Isastrea trigeri de Fromentel, 1887, pl. 192, fig. 1; Monotypy Alloiteau, 1952, p. 659
Type Specimen: Lectotype; ; Not Traced; Unknown
Type Locality: Cenomanian of France (Le Mans, Sarthe).
The holotype of the type species is housed at MNHN (Paris) under B16420.
Classification
Diagnosis
Colonial, massive, cerio-plocoid, meandroid. Budding predominantly intracalicular. Calices monocentric or arranged in discontinuous series, separated by tectiform to tholiform collines. Ambulacra present or absent. Costosepta generally compact, confluent to nonconfluent. Septal flanks have fine dentations, flattened and rounded granules, and small pennulae. Columella spongy-papillose or made of irregular segments. Synapticulae numerous. Wall parasynapticulothecal, incomplete or absent. Septothecal thickenings present or absent. Endothecal dissepiments abundant.
Comparisons
Like Dimorphomeandra but forms subplocoid-subcerioid to submeandroid colonies.
Remarks
In contrast to the original documentation by Alloiteau (1957, p. 287), the septal structures of genus Trigerastrea seem to be more closely related to types seen in genera like Dimorphomeandra, but correspond less to the genus Vallimeandra. Therefore, the genus Trigerastrea is grouped with the former taxon.
Distribution
- Central Europe; Late Cretaceous
Contains
This page has been in preparation since 02-Jun-2007 12:36
This version was contributed by Rosemarie Baron-Szabo on 31-May-2017 18:21.
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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