Columnocoenia
Alloiteau, 1952, p. 626
Type Species
Columnocoenia lamberti Alloiteau, 1957: 135; Subsequent Designation Alloiteau, 1957: 135
Type Specimen: Holotype; ; Verified; Unknown
Type Locality: Lower Campanian of France (Les Corbiere, Aude)
The holotype of the type species is housed at MNHN (Paris) under R.10974.
Classification
Synonyms
Diagnosis
Colonial, massive, plocoid. Budding mainly extracalicular, sometimes intracalicular of various kinds (such as the fission). Costosepta compact, arranged radially or irregularly radially to bilaterally. Development of granules on septal flanks by divergent trabeculae best described by MORYCOWA (1971, p. 95–98). Columella generally lamellar, or rarely made of a small number of short lamellar segments. Endothecal dissepiments vesicular or tabular, sparse. Pali or paliform structures before 1st and 2nd cycle septa irregularly present. Wall parasynapticulothecal and (para-)septothecal, with pores in places. Perithecal wall made of dissepiments and synapticulae.
Remarks
The species Placocoeniopsis katzi KUZMICHEVA, 1975, from the Danian of Ukraine is grouped with Columnocoenia (see BARON-SZABO, 2006, p. 51).
Distribution
- Western Europe; Middle Jurassic - Late Jurassic
- Subsaharan Africa; Late Jurassic
- Southeast Asia; Late Jurassic
- Southern Europe, Central Europe, Eastern Europe; Early Cretaceous - Late Cretaceous
- North Africa; Early Cretaceous
- South Asia; Early Cretaceous
- Central America; Early Cretaceous
- Eastern Europe; Paleocene
This page has been in preparation since 02-Jun-2007 12:35
This version was contributed by Rosemarie Baron-Szabo on 20-Jun-2016 21:36.
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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