Coryphyllia subregularis Beauvais, 1986

Vasseur, Raphaël & Lathuilière, Bernard, 2021, Pliensbachian corals from the Western Tethys, Geodiversitas 43 (22), pp. 1187-1291 : 1214

Coryphyllia subregularis Beauvais, 1986

( Fig. 17 )

Coryphyllia subregularis Beauvais, 1986: 23 , pl. 4, fig. 3. — Vasseur 2018: 156-157, pl. 3.21.

? Stylophyllopsis mojsvari – Frech 1890: 52, pl. 10, fig. 7-8, non fig. 9-14.

TYPE MATERIAL. — Holotype: MNHN.F.R11609 ( Beauvais 1986: 23, pl. 4, fig. 3).

TYPE HORIZON. — Domerian ( Fuciniceras cornacaldense horizon).

TYPE LOCALITY. — Jebel el Kounif (Bou-Arfa Range), Morocco.

STUDIED SAMPLES. — Two specimens: holotype, MNHN.F.R11609 ; CPUNMA0504E9-1.

GEOGRAPHIC AND STRATIGRAPHIC RANGES. — Pliensbachian of Jebel El Kounif and Koudiat Ech Chehem ( Morocco).

DESCRIPTION

Solitary, subcylindrical coral with rounded calicular edges. Radial elements are probably costosepta (costal part has not been clearly observed). They are straight, thin, slightly bicuneiform, with smooth distal edge and sometimes rhopaloid or joined inner edge for the first size orders of septa. The lateral ornamentation is absent or very thin and has not been observed.Ghosts of a mid-septal line seem to appear among the diagenetic figures. No columella but a constricted, elongated fossa that defines a bilateral symmetry. Endotheca made of large vesicular dissepiments distributed in all the interseptal space. Parathecal incomplete wall. No epitheca observed.

Calicular diameter: 45 to 52 mm – Number of septa: approximately 80 according to Beauvais (1986) – Septal density: 3 to 5 per 2 mm.

SIMILARITIES AND DIFFERENCES

Differs from Coryphyllia regularis Cuif, 1975 by a less regular septal apparatus, endotheca made of larger and less numerous dissepiments and the apparent lack of epicostal epitheca that is thin and easily eroded in C. regularis .

Figures

FIG. 17. — Coryphyllia subregularis Beauvais, 1986: A, distal and proximal views of the holotype MNHN.F.R11609; B, transverse polished section of the holotype MNHN.F.R11609; C, lateral view of the holotype MNHN.F.R11609; D, transverse thin section of the holotype MNHN.F.R11609. Scale bars: A, B, C, 1 cm; D, 4 mm.