Thecactinastraea
Beauvais, 1986, p. 33
Type Species
Thecactinastraea fasciculata Beauvais, 1986, p. 33 pl. 5 fig. 1 text-fig. 21; Original Designation
Type Specimen: Holotype; MNHN R11611; Verified; Dry Preserved
Type Locality: Early Jurassic from Tarhilest (Morocco)
The holotype includes 5 pieces and two thin sections: one transverse, one longitudinal.
Description
Phaceloid corallum with subcylindrical corallites covered with an epitheca showing regular growth rings and finer striation. costae. Corallite outline subcircular to distorted after the intracalicular budding, cutting calicular edge. Radial elements compact, free, attenuated, straight. Distal edge with regular teeth, inner edge with detached trabeculae producing a papillose columella, lateral faces possibly with mi-pennules, Microstructure not known. Hexameral symmetry probable, bilateral symmetry poorly developed. Endotheca made of dissepiments straightened near the wall and sloping down to the center, columella papillose, peripheric wall whose the nature is difficult to precise. Very small vertical striation suggesting a trabecular nature.
Comparisons
Thecactinastraea differs from Phacelophyllia because of its free septa.
Remarks
Two nominal species.
Distribution
- Southern Europe; Early Jurassic
- North Africa; Early Jurassic
This page has been in preparation since 20-Aug-2009 09:22
This version was contributed by Bernard Lathuilière on 02-Nov-2012 09:52.
Page authors are: Bernard Lathuilière. Please contact the editor if you would like to contribute to the diagnosis of this taxon.
The editor is: Bernard Lathuilière
|