Allocoeniopsis
Alloiteau, 1958, p. 11
In the same publication Alloiteau used the different spellings: Allocoeniopsis (p. 12 and pl. 12) and Allocaeniopsis (p. 11). This is obviously a lapsus calami. Then we consider Allocaeniopsis as a nomen vanum. He considered erroneously Stephanocoenia oolitica as coming from the Bathonian of Saint Gaultier (Koby 1907) but the species of Koby was published two years earlier as coming from Grasse Roquevignon (Koby 1905).
Type Species
Stephanocoenia oolitica Koby 1905, p. 860, pl. 54 fig. 3-4; Original Designation
Type Specimen: Lectotype; MNHN A32025; Verified; Dry Preserved
Type Locality: Bathonian (Middle Jurassic) of Grasse Roquevignon (Alpes maritimes, France)
The lectotype is a small skullcap colony with a small part polished.
Classification
Description
Massive cerioid-thamnasterioid corallum with polygonal corallites No visible epitheca. Intercalicinal increase. Radial elements are compact free or anastomosed biseptal sheets bent upon the wall. Septa attenuated. Distal edge with equal regular teeth, inner edge with regular teeth, lateral faces with acute granules probably aligned in steeply inclined carinae. A crown of pali more or less regularly expressed according to corallites. Microstructure unknown. Hexameral symmetry well expressed, weak bilateral symmetry characterised by elongation of the columella . Endotheca not visible , columella styliform to sublamellar, synapticulae probably absent, wall not high enough to be visible everywhere, sometimes in zigzag, nature unknown.
Remarks
Eight nominal species in Jurassic only
Distribution
- Western Europe, North Africa; Early Jurassic - Middle Jurassic
This page has been in preparation since 07-May-2009 07:19
This version was contributed by Bernard Lathuilière on 19-Feb-2010 10:48.
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
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