Stylophyllopsis vetusum ( Beauvais, 1986 )

Vasseur, Raphaël & Lathuilière, Bernard, 2021, Pliensbachian corals from the Western Tethys, Geodiversitas 43 (22), pp. 1187-1291 : 1270

Stylophyllopsis vetusum ( Beauvais, 1986)

( Fig. 57 )

Epistreptophyllum vetusum Beauvais, 1986: 56 , pl. 15, fig. 6 et 7.

Stylophyllopsis vetusum – Vasseur 2018: 332-333, fig. 3.91.

STUDIED SAMPLE. — Holotype MNHN.F.R11648. GEOGRAPHIC AND STRATIGRAPHIC RANGES. — Pliensbachian of Jebel Bou Dahar ( Morocco) .

DESCRIPTION

Subcylindrical corallum, elliptical in outline, with convex calicular plateau showing a slightly depressed fossa. Radial elements are subcompact, straight or slightly curved, free or joined costosepta with a stylophyllid structure. We did not observed the pennulae described by Beauvais (1986). Septal spines in the frame of septa project at the inner edge in the axial space and produce a weak parietal papillose columella. Radial symmetry and bilateral symmetry following the calicular elongation. Endotheca made of numerous dissepiments. Synapticulae not observed. Epitheca s.l. present.

Calicular diameter: 17 to 20 mm – Number of septa: approximately 120 – Septal density: 4 to 7 per 2 mm.

REMARK

The original material described in Beauvais (1986) consists in a heterogeneous batch. The holotype belongs to the Stylophyllidae because of its septal structure. One of the paratypes (within the batch MNHN.F.A32021) seems to be a Proleptophyllia . None of the specimens shows the typical characters of the genus Epistreptophyllum Milaschewitsch, 1876 .

Figures

FIG. 57. — Stylophyllopsis vetusum (Beauvais, 1986): A, distal view of the holotype MNHN.F.R11648; B, lateral view of the holotype MNHN.F.R11648; C, lateral view of the holotype MNHN.F.R1164; D, distal peripheral view of the holotype MNHN.F.R11648; E, detail in distal view of the holotype MNHN.F.R11648. Scale bars: A, C, 1 cm; B, E, 5 mm; D, 1 mm.