Sakalavastraea

Alloiteau, 1958, p. 60

Type Species

Sakalavastraea collignoni Alloiteau, 1958, p. 60, pl. 1 fig. 7, 9, pl. 15 fig. 4; Original Designation

Type Specimen: Holotype; MNHN M05165; Verified; Dry Preserved

Type Locality: Lower Callovian from Ankazomiheva (Madagascar)

The holotype includes 2 thin sections

Description

Massive cerioid corallum with polygonal corallites. Intracalicular increase. Radial elements compact frequently anastomosed even in a contratingent manner, attenuated, sinuous rarely confluent between calices. Distal edge not observed. Lateral faces with blunt irregularly distributed granules. The hexameral symmetry cannot be deciphered, bilateral symmetry discreet. Endotheca made of numerous vesiculose dissepiments Columella variable not known in distal view In section, the axial space is often occupied by the prolongation of a septum or two opposed septa, other major septa join the axial structure. No synapticulae. Wall septothecal at least in part.

Comparisons

Differs of Isastrea by the columella, the anastomosing septa and the septal ornamentation.

Remarks

Two nominal species.

Distribution

• Western Europe, Southern Europe, North Africa, Subsaharan Africa, North America; Middle Jurassic - Late Jurassic

This page has been in preparation since 20-Aug-2009 07:35

This version was contributed by Bernard Lathuilière on 10-Dec-2009 09:51.

Page authors are: Bernard Lathuilière. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Bernard Lathuilière