Tricycloseris
Tomes, 1878, p. 190
Type Species
Tricycloseris anningi Tomes 1878, p. 190, pl. 9 fig. 1; Monotypy
Type Specimen: Holotype; NHMUK R 11944; Verified; Dry Preserved
Type Locality: Pliensbachian (Margaritatus zone) of a fallen block on the shore near Charmouth (Dorset, England)
The holotype was figured and redescribed in Thomas 1935, p. 425, pl. 18, fig. 1a-c
Classification
Description
Small massive thamnasterioid corallum with large corallites. Epitheca absent or eroded. Costae subequal. Intracalicinal increase. Radial elements are compact anastomosing, subequal in thickness along the radial directions and subequal from one to another, straight or curved. Distal edge moniliform with regular teeth corresponding to heads of trabecules, inner edge not observed, lateral faces covered of menianae, pennular outline festooned (seen from above). Microstructure not known. Hexameral symmetry cannot be deciphered, bilateral symmetry due to curvature of septa. Abundant endotheca made of dissepiments. The axial zone of the holotype cannot be satisfactorily observed. Synapticulae probably present but it is difficult to distinguish from connecting pennulae or thick dissepiments without thin section properly oriented. Wall absent between corallites.
Comparisons
It looks like a colonial Leptophyllia
Remarks
Of the nominal species cited for Tricycloseris, probably only the type species, known by only one specimen is a Tricycloseris. Gregory's "Tricycloseris" from India have perforated septa.
Distribution
- Western Europe; Early Jurassic
This page has been in preparation since 20-Aug-2009 09:34
This version was contributed by Bernard Lathuilière on 05-Feb-2010 15:02.
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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