Alloiteau, 1952, p. 605
Epismilia liasica Fromentel and Ferry, 1865, p. 53 pl. 15 fig. 3; Monotypy
Type Specimen: Lectotype; MNHN M 03740; Verified; Dry Preserved
Type Locality: Pliensbachian from May sur Orne (Calvados, France)
Solitary trochoid slightly arched corallum. Subcircular calice. Moderately deep calicular platform. Radial elements compact, free, anastomosing only in depth at the center, exsert, slightly bicuneiform to attenuated, generally straight, lateral S1 curved. Distal edge festooned, lateral faces smooth. Distal inner edge with large well detached teeth. Radial hexameral symmetry. Bilateral symmetry marked by the elongated fossa and the curvature of lateral S1. Endotheca made of something intermediate between dissepiments and tabulae climbing along the wall. No synapticule. Wall incomplete, covering the outer side of radial elements with tabuloid dissepiments curved with their concavity in the inner distal direction.
The difference with Plesiophyllum is the septal ornamentation. Perhaps they can be synonymised but we don't know enough about the variability of this Pliensbachian fauna of St May sur Orne. A comparison with Stylophyllopsis and Oppelismilia is to be considered.
What is called an "incomplete wall" is called "endothecal epitheca" by Alloiteau 1957. His fig. 46 is purely theoretical. Four nominal species are cited.
- Western Europe, North America; Early Jurassic - Middle Jurassic
This page has been in preparation since 18-Aug-2009 17:39
This version was contributed by Bernard Lathuilière on 04-Feb-2011 14:23.
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