Collignonastraea

Alloiteau, 1958, p.98

Type Species

Comoseris jumarense var. radiata Gregory 1900; Original Designation Alloiteau 1958, p. 98

Type Specimen: Syntype; GSI N° 6754; Verified; Dry Preserved

Type Locality: Middle Bathonian, Coral Bed, Jumara Dome, Kachchh, India

Kachchh material was described and illustrated by Beauvais (1978: 65, pl. 6, fig. 4) and Pandey and Fürsich (1993: 39, Text fig. 24, Pl. 10, figs. 5-6, 8-13, 15-16). The genus was described and illustrated in detail several times (Beauvais 1966: 1020-1021; Pandey et al. 2000: 12, pl. 4, fig. 4; 2003: 84, pl. 25, fig. 3-5; 2006: 66-69, pl. 6, figs. 2-5).

Diagnosis

Corallum colonial, low meandroid with intracalicular increase, distinct calices arranged in series. Upper surface convex to slightly concave, subcircular in plan view. Lower surface covered with holotheca and concentric rugae. Series are laterally separated by collines, occasionally divide into two near the periphery. Collines either radiating, meandroid or irregular. Septa, or in some cases, where stereozone develops along the collines, costo-septa are confluent within the series but limited by synapticulothecal wall at the apex of collines. Costo-septa thin to thick, occasionally anastomosing, subcompact with obtuse to angular and equidistant denticles at distal margins and granules of several shapes on lateral surfaces. Columella papillose to spongy. Endothecal elements consisting of vesicular dissepiments and synapticulae.

Comparisons

Comparison with Microphyllia and Comophyllia is in progress

Distribution

• South Asia; Middle Jurassic

This page has been in preparation since 15-May-2009 16:32

This version was contributed by Bernard Lathuilière on 29-Jun-2009 13:06.

Page authors are: Dhirendra Kumar Pandey. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Bernard Lathuilière