Dendraraea

D'Orbigny, 1849, p. 10

Type Species

Alveopora racemosa Michelin, 1844, p. 110 pl. 25 fig. 6; Monotypy

Type Specimen: Neotype; MNHN M00231; Verified; Unknown

Type Locality: Oxfordian (Upper Jurassic) from Saint Mihiel (Meuse; France)

The neotype specimen is illustrated in Beauvais (1964) but skeleton and voids are inverted in the interpretation (text fig 54). The corresponding thin section can be seen in Lathuilière and Gill (1998, pl. 4 fig. 1).

Classification

• Family: Microsolenidae Koby, 1889

Synonyms

• Thamnarea Etallon, in Thurmann and Etallon 1864, p. 411

Diagnosis

Ramose Microsolena

Description

Branching ramose thamnasterioid corallum but calices not always distinct. Cylindrical to flattened branches. Radial elements are pennular regularly fenestrate biseptal sheets, often anastomosed and attenuated. Distal edge moniliform. Pennular rims turned toward the distal direction or not, with various degrees of lateral continuity. No palis. Endotheca made of thin dissepiments in the direction of rapid growth and thick tabuloid dissepiments in the direction of slow growth. Synapticules present. Fossa marked in surface or (?) columellar space occupied by a trabecula . No wall.

Remarks

The "Thamnaraea" sp. recently described from Bulgaria (Tithonian Valanginian interval) by Roniewicz 2008 could be the last apparition of the genus but remains disputable. The possible occurrence of a columella is also disputable.

Distribution

• Western Europe, Central Europe, Eastern Europe, North Africa; Middle Jurassic - Late Jurassic

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

This version was contributed by Bernard Lathuilière on 14-May-2011 09:32.

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

The editor is: Bernard Lathuilière