Wells, 1937, p.74

Type Species

Pachygyra tuberosa d'Orbigny 1850, p. 38; Original Designation

Type Specimen: Syntype; MNHN R09341; Verified; Dry Preserved

Type Locality: Oxfordian (Upper Jurassic) of Châtel-Censoir (France)



(from the syntype) Massive meandroid (nearly phacelo-meandroid) corallum with closed valleys separated by deep and wide ambulacra. Distinct centers. Peritheca between valleys covered with finely granulated rows. Lower face covered by a smooth tectura. Radial elements compact, free, bicuneiform, straight, highly unequal, typically rhipidogyrid in shape. Inner edge often enlarged in T, auricules present. Lateral faces covered with numerous strong granules. No palis. Hexameral symmetry not deciphered, bilateral symmetry obviously demonstrated by the elongation of calices and by the lamellar columella. Endotheca not observed. synapticulae absent. Thick wall.


A probable transition exists with the clearly phaceloid genus Aplosmilia. The wide and deep peritheca allows a distinction with Psammogyra.


Errenst 1991, p. 4 pl. 13 fig. 3a-c and Pandey and Fürsich 2003, p. 124 pl. 37 fig. 5 cited the type-species. Five nominal species are known in Jurassic.


  • Western Europe; Late Jurassic
  • Southern Europe; Late Jurassic
  • Central Europe; Late Jurassic
  • South Asia; Late Jurassic

This page has been in preparation since 19-Aug-2009 15:06

This version was contributed by Bernard Lathuilière on 13-Mar-2013 08:57.

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

Syntype of the type species of Kologyra
Syntype of the type species of Kologyra
Syntype of the type species of Kologyra
Syntype of the type species of Kologyra

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