Hemiporites jacobi Alloiteau, 1952

Löser, Hannes, 2012, Revision of the family Hemiporitidae (Scleractinia, Late Cretaceous), Geodiversitas 34 (2), pp. 399-407 : 401-402

Hemiporites jacobi Alloiteau, 1952 ( Fig. 2 A-F)

Hemiporites Jacobi [sic] Alloiteau, 1952: 641; 1957: 233, figs 169-172, pl. 9, fig. 10, pl. 18, fig. 12.

non Hemiporites jacobi – Kuzmicheva 1982: 104, pl. 1, fig. 5; 2002: 180, pl. 27, fig. 5.

HOLOTYPE. — MNHN.F.R10937.

MATERIAL EXAMINED. — Holotype and four unnumbered thin sections ( MNHN.F) of which one could clearly be identified as having been obtained from the holotype (illustrated here in Fig. 2 A-E).

OCCURRENCE. — Turonian of Tuilerie Saint Michel, W Padern (Aude, France).

DIMENSIONS

cl min = 1.8-2.43- 3.2 mm.

cl max = 2.9-3.42- 4 mm.

ccd = 3.8-5.3- 6.7 mm.

s = 32-40.

DESCRIPTION

Plocoid colony with elliptical or circular calices that are arranged in irregular rows. Septa compact, made of large trabeculae. Septa free, not attached to each other. Septa bicuneiform in outline, having the thickest part in the wall. Septal lateral faces with few thorns, generally poorly ornamented. Septal inner margin swollen, more pronounced in the first septal cycle. Septa have regular radial decameral symmetry. Septal cycles differ in length and thickness, but the last cycle is not complete. Costae short and non-confluent. Columella lamellar, thick, in places connected to the septa of the first cycle. Wall compact, septothecal by thickening of septa. Endotheca made by thick tabulae. Coenosteum made by thick isolated trabeculae and tabulae.

Figures

FIG. 2. — A-F, Hemiporites jacobi Alloiteau, 1952: A-E, holotype MNHN.F.R10937 (transverse thin section); F, unnumbered thin section that may belong to the holotype (longitudinal thin section); G-I, Cerionefocoenia iberica Reig Oriol, 1995, holotype MGSB 55826; G, H, transverse thin sections;I, longitudinal thin section;J-L, Pachynefocoenia danieli Reig Oriol,1989,holotype MGSB 47205.Scale bars: A-C, F-L, 2 mm; D, E, 500 µm.