Selenegyra
Ogilvie, 1897, p. 119
Type Species
Selenegyra geikiei Ogilvie, 1897, p. 121, pl. 16 fig. 5,6; Monotypy
Type Specimen: Lectotype; BSPG AS.III.49; Verified; Dry Preserved
Type Locality: Tithonian (Upper Jurassic)-Berriasian (Lower Cretaceous) from Štramberk (Czech Republic)
The lectotype fixed by Geyer 1955 b is a dry sectioned specimen with a transverse thin section. A paralectotype is available. The paralectotype was figured in and redescribed in Beauvais 1976, p.14, pl. 3 fig. 3
Classification
Description
Phaceloid corallum with non cylindrical corallites, reniform in outline. Thin equal costae more numerous than septa, covered by a thin epitheca. Transverse growth rolls. Increase by Taschenknopung. Radial elements are compact free or anastomosed sinuous with rare sharp granules. Distal edge unknown, inner edge mostly attenuated. Strong bilateral symmetry due to the elongation of corallites. Endotheca of cellular numerous dissepiments. Columella absent, elongated fossa, no synapticulae, wall made of closely packed trabecules or abortive septa.
Comparisons
The reniform shape of corallites is unique.
Remarks
One nominal species
Distribution
- Central Europe; Late Jurassic - Early Cretaceous
This page has been in preparation since 20-Aug-2009 07:38
This version was contributed by Bernard Lathuilière on 27-Nov-2010 10:17.
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
|