Koby, 1888, p. 420
Cheilosmilia microstoma Koby, 1888, p. 420 pl. 113 fig. 6-7; Monotypy
Type Specimen: Lectotype; NMB D 3923; Verified; Dry Preserved
Type Locality: Oxfordian from La Caquerelle (Switzerland)
Beauvais, 1963 designated a lectotype and redescribed the genus. She made sections in the Koby's material. Two paralectotypes exist in Geneva (MHNG GEPI 61521)
Solitary or subcolonial, conical to cylindrical corallum. Probable pachytheca and pocket budding producing only rudimentary daughter corallites. Cutting calicular edge. External surface of the corallum wrinkled. Radial elements are compact lonsdaleoid septa arranged according to a strong bilateral symmetry marked by a cardinal septum. Other septa are subequal and arranged by pairs in bilateral symmetry. Two zonal endotheca with an outer marginarium made of vesicular dissepiments and an inner endotheca made of tabuloid dissepiments.
Opisthophyllum was synonymized with Cheilosmilia by Beauvais 1963 but this author changed her view in 1976, considering that a marginarium is constant all along the longitudinal section in Cheilosmilia. Additionally Eliášová 1975 remarked that the size of septa and the elongation of the axial zone is also a criterium to distinguish these genera.
With the synonymy of Lingulosmilia and Sclerosmilia, 10 nominal species are counted, probably few are valid.
- Western Europe, Central Europe, North Africa; Middle Jurassic - Late Jurassic
This page has been in preparation since 07-May-2009 09:55
This version was contributed by Bernard Lathuilière on 16-Nov-2013 10:27.
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