Trocharea tenuilamellosa ( Gregory, 1900 )

Vasseur, Raphaël & Lathuilière, Bernard, 2021, Pliensbachian corals from the Western Tethys, Geodiversitas 43 (22), pp. 1187-1291 : 1207-1211

Trocharea tenuilamellosa ( Gregory, 1900)

( Fig. 13 )

Trochoplegma tenuilamellosa Gregory, 1900: 180 , pl. 23, fig. 3-10, pl. II, fig. 8. — Koby 1904: 125, pl. 25, fig. 17-18, pl. 26, fig. 1-2. — Alloiteau 1957: 338. — Beauvais 1978: 61. — Pandey & Fürsich 1993: 29, pl. 8, fig. 11-16. — Pandey et al. 2000: 22, pl. 5, fig. 2. — Pandey & Fürsich 2003: 112, pl. 29, fig. 4-5.

Dimorpharaea tenuilamellosa – Bendukidze 1949: 113, text fig. 15. — Bendukidze 1982: 98.

Trocharea tenuilamellosa – Geyer 1955: 355; Flügel 1966: 67, pl. 17, fig. 3-4.

Trocharaea tenuilamellosa – Beauvais L. in Manivit 1987: table B 15.

Trochoplegma sp. 1 – Vasseur 2018: 368-369, fig. 3.106.

TYPE MATERIAL. — Syntypes housed in Geological Survey of Calcutta. TYPE HORIZON. — Bathonian (Upper Putchum beds). TYPE LOCALITY. — North West Jumara and South Drang ( India). STUDIED SAMPLES. — Two specimens: CPUN 2303 A4(2)-3, CPUN AM16164-4. GEOGRAPHIC AND STRATIGRAPHIC RANGES. — Pliensbachian of Amellagou ( High Atlas of Morocco). Bathonian of India Saudi Arabia, Callovian of Jordan, Aalenian-Bajocian and Bathonian-Callovian of Iran, Late Jurassic of Portugal, Oxfordian of Georgia.

DESCRIPTION

Solitary, fungiform corallum with circular, flat or slightly convex calicular surface showing a small axial fossa. Radial elements are straight, porous septa with typically microsolenid pennular structures. A weak columella of unknown nature appears in depth. Endotheca made of rare, thin vesicular dissepiments. Synapticulae present. A thick, concentrically wrinkled holotheca covers the base of the colony.

Calicular diameter: 24 to 26 mm – Number of septa:> 300 – Septal density: 9 per 2 mm.

Figures

FIG. 13. — Trocharea tenuilamellosa (Gregory, 1900): A, distal view of the specimen CPUN 2303A4(2)-3 before section; B, distal view of the specimen CPUN AM16164-4; C, detail distal view of the calice in the specimen CPUN AM16164-4; D, lateral view of the specimen CPUN AM16164-4; E, polished transverse surface of the specimen CPUN 2303A4(2)-3 (skeleton in halftone, skeletal void in light in the upper part, in dark in the lower part); F, longitudinal polished section of the specimen CPUN 2303A4(2)-3 that does not cross the calicular center (skeleton in light). Scale bars: A, B, D, 1 cm; C, E, 2 mm; F, 3 mm.