Conocoenia
d'Orbigny 1849, p.7
Conocoenia d'Orbigny 1849, p.7 is a nomen oblitum (available and invalid).
Conocoenia is considered synonym of Heliocoenia Etallon 1859. Unfortunately this genus was never used since d’Orbigny. It is then considered as a nomen oblitum
Type Species
Astrea tumularis Michelin 1844, p. 117, pl. 27, fig. 3; Monotypy
Type Specimen: Syntype; MNHN M00252; Verified; Dry Preserved
Type Locality: Oxfordian (Upper Jurassic) from St Mihiel (Meuse; France)
Alloiteau 1948 described Conocoenia but he did not see the type-material. Unfortunately he used a specimen of the type-species originating from the d’Orbigny’s collection to describe “Heliocaenia d’Orbigny 1849”
Classification
Description
From the type material: Massive dome shaped plocoid corallum. Circular to subcircular exsert calices. Finely granulated peritheca. Costae not visible from the surface. Extracalicular increase. Radial elements compact straight unequal. Major septa free or anastomosed to the columella. Inner edge with auriculae. Microstructure unknown. Hexameral and bilateral symmetry. Endotheca not observed, columella styliform strong and elongated, synapticulae absent, elevated wall of unknown nature.
This page has been in preparation since 07-May-2009 10:43
This version was contributed by Bernard Lathuilière on 07-Mar-2013 17:33.
Page authors are: Shaahin Zaman 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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