Sematethmos

Gregory, 1900, p. 168

doubtful, possibly a extreme form of Epistreptophyllum cornutiformis

Type Species

Sematethmos sinuosa Gregory, 1900: 169, pl. 21, fig. 4; Original Designation

Type Specimen: Holotype; GSI N°6972; Not Traced; Unknown

Type Locality: Middle Bathonian, Coral Bed, Jumara Dome, Kachchh, India

The genus has not been revised ever since Gregory recorded from Kachchh. The type material is a holotype by monotypy.

Diagnosis

Corallum colonial, pedunculate, intracalicular increase, septa subcompact with some pores near upper inner margin of septa, columella parietal.

Remarks

It seems that Sematethmos, described by Gregory (1900) on the basis of a single specimen, could be rather close or even an extreme morphotype of the same specific population of Epistreptophyllum cornutiformis. Most probably this is a junior synonym of Epistreptophyllum. The single specimen in Geological Survey of India, Kolkata (N°6972) should be verified for its septal microarchitecture for a final decision. Sematethmos described by Flügel (1966) could be misidentified, especially if the differences in gemmation, corallum shape and pattern of anastomoses of septa is considered according to his figure.

Distribution

• South Asia; Middle Jurassic

This page has been in preparation since 20-Aug-2009 07:38

This version was contributed by Bernard Lathuilière on 04-Dec-2009 10:02.

Page authors are: Dhirendra Kumar Pandey. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Bernard Lathuilière