Dendrastrea

Orbigny, 1849, p. 9

Type Species

Astrea dissimilis Michelin, 1846, p.226, pl. 54 fig. 12; Monotypy

Type Specimen: Neotype; MNHN F.A59986; Verified; Dry Preserved

Type Locality: Initial type material came from Langrune (Calvados, France) Dogger, the neotype from Luc (Calvados, France)

The neotype was erected and illustrated by Lathuilière, Charbonnier and Pacaud (2017).

Description

Ramose cerioid corallum with polygonal corallites. Extracalicular increase producing young small corallites at the top of the branches. Radial elements are compact, free septa, confluent or non confluent, weakly attenuated, straight to slightly curved unequal in length. Distal edge with few regular small teeth, probably corresponding to subvertical carinae. Inner edge often enlarged. Lateral faces with acute granules. No pali. Microstructure unknown. Radial symmetry rather octameral, bilateral symmetry generally not observed. Endotheca not observed, columella absent but a clear central subcircular fossa. Synapticulae possibly present in the wall (?). Wall in zigzag, probably paraseptothecal.

Remarks

Two nominal species known

Distribution

• Western Europe; Middle Jurassic
• South America; Middle Jurassic

This page has been in preparation since 18-Aug-2009 16:20

This version was contributed by Bernard Lathuilière on 21-Jul-2017 14:18.

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