Paraphyllogyra
Beauvais, 1970, p. 1117
Type Species
Phyllogyra sinuosa Tomes 1882, p. 431, pl 18, fig. 5-7; Original Designation
Type Specimen: Lectotype; NHMUK R 10991; Verified; Dry Preserved
Type Locality: Bajocian (Middle Jurassic) of Leckhampton (Gloucestershire, Great Britain)
The lectotype was selected (fixation by inference of holotype ICZN art. 74.6) figured and redescribed in Beauvais, p. 1117 pl.1, fig. 2 . Paralectotypes R 10992 to R 10995 provide good indications on the variability of the colonial morphology.
Classification
Synonyms
Diagnosis
Like Isastrea but meandroid and with a holotheca
Description
Massive meandroid corallum with more or less sinuous valleys. No ambulacrum, septa of valleys often present. Holotheca thick, folded and striated. Radial elements are compact free attenuated curved septa. Distal edge with regular equal acute rhomboidal teeth, inner edge not observed, lateral faces with subvertical carinae. No pali. Microstructure probably montlivaltid (but no thin section available). Hexameral symmetry cannot be deciphered, bilateral symmetry marked with curvature of septa. Endotheca with numerous vesicular dissepiments. Axial zone occupied by a fossa. Synapticulae potentially present in the wall. Wall often in zigzag on the collines, externally very similar to that of Isastrea.
Remarks
One nominal species known for Jurassic
Distribution
- Western Europe; Middle Jurassic
This page has been in preparation since 19-Aug-2009 16:42
This version was contributed by Bernard Lathuilière on 27-May-2017 09:55.
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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