Pachygyra
Milne Edwards and Haime, 1849, p. 194
Type Species
Lobophyllia labyrinthica Michelin, 1846: 290; Monotypy Milne Edwards and Haime, 1848: 194.
Type Specimen: Holotype; ; Verified; Unknown
Type Locality: Coniacian to Santonian of France (Les Corbieres, Aude).
The lectotype of the type species is housed at MNHN (Paris) under M01112. Fixation of the lectotype was by inference of a 'holotype' (abusive designation, ICZN 74.6)
Classification
Diagnosis
Colonial, massive, subflabellate-meandroid. Budding intracalicular, resulting in sinuous, non-ramified, calicinal series, which are separated by perithecal walls and ambulacra. Calicinal series are always projecting, their edges remain free. Calicinal centers indistinct. Costosepta compact, finely granulated laterally. Columella lamellar, generally continuous. Wall septothecal. Perithecal and endothecal dissepiments thin, subtabulate.
Comparisons
The genus Strotogyra is, in addition to Placosmilia MILNE EDWARDS and HAIME, 1848, most closely related to the genus Pachygyra MILNE EDWARDS and HAIME, 1848. The most important difference from Pachygyra lies in the colony formation which in Pachygyra is massive meandroid, whereas in Strotogyra corallites are arranged in laterally free meandroid series. Consequently, Pachygyra has the additional skeletal feature of exothecal developments between calicinal series. Moreover, it lacks a parathecal stereozone.
Remarks
Cretaceous of southern Europe, Upper Turonian and Upper Santonian of France, Coniacian-Campanian of northern Spain, Coniacian-Santonian of Austria (Gosau Group), Santonian-Campanian of Slovenia, Maastrichtian of Jamaica; Danian of Pakistan (Jhirk, Sind), Paleocene of Austria, Italy (Adriatic platform), and Egypt, Upper Paleocene-Lower Eocene of ?Somalia, Eocene of Slovak. Carpathians, Eocene of Bosnia, Middle Eocene of Italy (San Giovanni Ilarione), Upper Eocene of Germany (Eisenrichterstein).
This page has been in preparation since 02-Jun-2007 12:36
This version was contributed by Rosemarie Baron-Szabo on 17-Jul-2016 19:57.
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
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