Epismiliopsis liasicus ( Fromentel & Ferry, 1865 )

Vasseur, Raphaël & Lathuilière, Bernard, 2021, Pliensbachian corals from the Western Tethys, Geodiversitas 43 (22), pp. 1187-1291 : 1254

Epismiliopsis liasicus ( Fromentel & Ferry, 1865)

( Fig. 46 )

Epismilia liasica Fromentel & Ferry, 1865: 53 , pl. 15, fig. 3.

Epismiliopsis liasicus – Alloiteau 1952: 605; 1957: 93, txt-fig. 46. — Vasseur 2018: 194-195, fig. 3.37.

Epismiliopsis liasica – Beauvais 1986: 18.

TYPE MATERIAL. — Holotype: MNHN.F. M03740 , Fromentel & Ferry 1865: 53, pl. 15, fig. 3. TYPE HORIZON. — Pliensbachian . TYPE LOCALITY. — May-sur-Orne, France. STUDIED SAMPLE. — Holotype MNHN.F. M03740 . GEOGRAPHIC AND STRATIGRAPHIC RANGES. — Pliensbachian of May-sur-Orne ( Calvados , France).

DESCRIPTION

Solitary trochoid slightly arched corallum. Subcircular calice. Moderately deep calicular platform. Radial elements compact, free, joining only in depth at the center, exsert, slightly bicuneiform to attenuated, generally straight costosepta, with 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 extended tabular dissepiments climbing along the wall. No synapticule. An epicostal epitheca s.l. covers the external part of the corallum.

Calicular diameter: 24.6 mm – Number of septa: approximately 82 – Septal density: 3 per 2 mm.

Figures

FIG. 46. — Epismiliopsis liasicus. A, lateral view of the holotype MNHN.F.M03740; B, distal view of the holotype MNHN.F.M03740; C, transverse polished section of the holotype MNHN.F.M03740; D, lateral distal view of the holotype MNHN.F.M03740. Scale bars: A, B, C, 1 cm; D, 3 mm.