Genabacia
Milne Edwards and Haime, 1849, p. 71
Type Species
Fungia stellifera D’Archiac 1843, p. 241, pl. 25, fig. 2; Original Designation
Type Specimen: Neotype; MNHN R54650; Verified; Dry Preserved
Type Locality: Bathonian (Middle Jurassic), Path from Aubenton to la Folie-Not (Aisne, France)
A neotype was selected by Beauvais 1967. The specimen is presently (2017) available at MNHN
Classification
Diagnosis
Like Chomatoseris but dimorphastreoid.
Description
Small automobile cyclolitoid corallum with a circumoral budding producing a row of small calicular pit around a mother corallite. Slightly conical in profile. Ambitus subcircular or elliptical. No holotheca. Typically microsolenid microarchitecture of radial elements, regularly fenestrate, anastomosed or free , slightly flexuous. Synapticulae and endotheca present. No wall. Columella absent or parietal and rudimentary.
Comparisons
Close of Semeloseris but the basal concavity and the elongation of the colony and relationships between daughter corallites are different. Differs from Dimorpharaea or Microsolena mainly by the downward growth that suggests an automobile faculty.
Remarks
See Gill 1972 for the structure and Gill 1979 for the biogeography
Distribution
- Western Europe; Middle Jurassic
This page has been in preparation since 18-Aug-2009 17:47
This version was contributed by Bernard Lathuilière on 18-Mar-2017 09:06.
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
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