Gretz, Lathuilière and Martini 2015
Cryptosepta nuda Gretz, Lathuilière and Martini 2015, p. 279, fig. 3, 4, 6; Original Designation
Type Specimen: Holotype; MHNG 2013-34 to MHNG 2013-37; Verified; Dry Preserved
Type Locality: Lower Hettangian (in an interval that could extend from the upper Psiloceras planorbis ammonite Zone to the lower Alsatites liasicus Zone). Ucel (Ardèche ; France).
Phaceloid growth form. Corallites forming conical calices. Variable corallite wall thickness, which is proximally thick and distally thin. In transverse and longitudinal sections, the wall often has a corrugated aspect that produces an irregular corallite shape. The number of septa is low. In the more distal parts, the estimated number of septa ranges between 20 and 25. The septa are poorly developed as septal ridges along the inner side of the wall; they are irregular and randomly distributed but not distinct in the distal corallite parts. No visible symmetry. Budding lateral or possibly parricidal. No columella. Certain corallites display a distinct fine external epithecal layer separated from the massive thecal structure and occasionally a fine layer that covers the internal theca. Rare endothecal structures represented by large horizontal tabulae. They separate the corallite into distinct portions. A new septal apparatus grows at the upper surface of these tabulae.
Cryptosepta is distinguished from other phaceloid pachythecal corals such as Pachysolenia, Pachydendron and Pachysmilia by its cryptic septa.
Only one species known
- Western Europe; Early Jurassic
This page has been in preparation since 21-Jan-2017 09:12
This version was contributed by Bernard Lathuilière on 11-Feb-2017 09:09.
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