Alloiteau, 1952, p. 635

Orbignygyra Alloiteau, 1952, p. 635 is a junior synonym (available and invalid), see Cycloria Reuss, 1854, p. 110-111.

Type Species

Diploria neptuni d’Orbigny, 1850: 208.; Unknown Alloiteau, 1952, p. 635

Type Specimen: Lectotype; MNHN M03774; Verified; Dry Preserved

Type Locality: Lower Coniacian of France (Les Corbieres, Aude).

The lectotype of the type species is housed at MNHN (Paris) under Mo3774.



Colonial. massive, meandroid. Budding mainly intracalicinal-terminal, producing wavy and ramified calicinal series, separated by often tectiform collines. Calicinal centers generally indistinct. Costosepta compact, strongly beaded laterally. Ambulacra irregularly present. Perithecal dissepiments vesicular. Columella lamellar, discontinuous. Wall parathecal and septothecal.


A re-examination of the type material by Baron-Szabo (2002) revealed that the type species of the genus Meandroria Alloiteau, 1952a, closely corresponded to the generic concept of Dictuophyllia Blainville, but some species which have been assigned to Meandroria corresponded to the genus Orbignygyra Alloiteau, 1952a (=junior synonym of Cycloria Reuss, see discussion under Cycloria), e.g. the species Orbignygyra tenella (Goldfuss, 1826).

This page has been in preparation since 02-Jun-2007 12:36

This version was contributed by Rosemarie Baron-Szabo on 26-Dec-2014 18:04.

Page authors are: Rosemarie Baron-Szabo. Please contact the editor if you would like to contribute to the diagnosis of this taxon.

The editor is: Rosemarie Baron-Szabo

Cycloria tenella (Goldfuss, 1826), holotype
Cycloria neptuni (Alloiteau, 1957), lectotype of type species of Orbignygyra