Dichotomosmilia

Beauvais, 1967, p. 29

Type Species

Dichotomosmilia ranvilllensis Beauvais 1967, p. 30 pl. 3 fig. 3; Original Designation

Type Specimen: Holotype; MNHN A24819; Verified; Dry Preserved

Type Locality: Bathonian from Ranville (Calvados, France)

The paratype R 54648 is probably a Euhelia gemmata

Description

Of the holotype….Dendroid corallum with an intracalicular septal increase producing a dichotomous branching in which branches are in a single plan. The corallum was epithecate but the colony was rolled in the oolitic depositional environment. Costae are probably originally absent. Calices infundibuliform. Radial elements are compact, attenuated, sinuous septa arranged in six systems well visible because S3 are anastomosed to S2 in a contratingent manner. Columella difficult to establish clearly because dorso-ventral S1 share all the visible calices in two parts. Endotheca not observed. No synapticule. Wall present, nature unknown.

Comparisons

The genus is very close of a young Cladophyllia. The dichotomous branching in a single plan could be a differentiating character but presently only one specimen is known.

Distribution

• Western Europe; Middle Jurassic

This page has been in preparation since 18-Aug-2009 16:29

This version was contributed by Bernard Lathuilière on 21-Oct-2009 09:17.

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