Paracycloseris Wells, 1934

Löser, Hannes, 2013, Revision of the family Felixaraeidae (Scleractinia; Cretaceous), Geodiversitas 35 (4), pp. 747-765 : 756-758

Genus Paracycloseris Wells, 1934

TYPE SPECIES. — Paracycloseris elizabethae Wells, 1934 by original designation.

DIAGNOSIS. — Solitary patellate coral. Calicular outline circular. Radial elements regularly perforated. Microstructure of large trabeculae. Radial elements in cross-section externally thick, becoming thinner towards the centre, first cycle disproportionately thicker than other cycles.Symmetry of radial elements radial and regularly hexameral. Cycles of radial elements regular. Septal cycles differ in length and thickness. First three septal cycles reach to the centre of the calice, further cycles are shorter. Radial elements free. Septal upper border coarsely granulated, lateral face with granules, inner margin smooth. Costae present, with granulae on their surface. Synapticulae present, abundant. Columella consists of a large group of isolated trabeculae. Endotheca unknown. Wall unknown. Epitheca present.

SPECIES. — Only the type species.

RANGE. — Late Maastrichtian. The occurrence in Cuba is stratigraphically not well constrained.

DISTRIBUTION. — Western Atlantic.

Paracycloseris elizabethae Wells, 1934 ( Fig. 2H, I )

Paracycloseris elizabethae Wells, 1934: 86 , pl. 3, figs 5-10, pl. 5, figs 1-2 (v); 1941: 291, pl. 2, fig. 1 (v); 1956: 387, fig.280.2 (v).— Vaughan &Wells 1943:135,pl.17, fig.6 (v).

non Paracycloseris elizabethae – Filkorn et al. 2005: 125, fig. 2K (= Fungiidae indet.) (v).

Paracycloseris nariensis – Baron-Szabo 2008: 178, pl. 17, figs 1, 2 [non 3-9] in part (v). Non Trochocyathus nariensis Duncan, 1880 .

MATERIAL EXAMINED. — USNM I-74489 (holotype), USNM 85834 (paratype), USNM J71-128 b ; one thin section.

DIMENSIONS. — USNM I-74489, c 28-29 mm, s 192; USNM 85834, c 25-26 mm, s 192; USNM J71-128b, c 27-28 mm, s 192.

OCCURRENCE. — Late Cretaceous of Cuba (La Habana) Madruga, Esperanza 10 km E Madruga; Cuba (Las Villas) Perseverancia. Late Maastrichtian of Jamaica (Westmoreland) Ducketts Land Settlement and St. James, Catadupa.

R EMARKS

In Baron-Szabo (2008), the species was included in the synonymy of Paracycloseris nariensis (Duncan, 1880) , which is here ruled out (for a more detailed discussion, see Löser, 2012).

Figures

FIG. 2. — A-D, Marcelohelia caribbiensis n. gen.,n. sp., holotype (IGM 8724);A, transversal thin section; B, colony surface;C, transversal thin section, detail; D, longitudinal thin section; E, F, Marcelohelia sp. (USNM #411); E, transversal thin section; F, longitudinal thin section; G, Brachycaulia jacobi Beauvais, 1982, holotype (MNHN.F.R10975), transversal thin section; H, I, Paracycloseris elizabethae Wells,1934;H, holotype (USNM I-74489),oral view;I, USNM J71-128b,transversal thin section.Scale bars:A,B, D-I,10 mm;C, 3 mm.