Euhelia
Milne Edwards, 1850, p. 90
Euhelia Milne Edwards, 1850, p. 90 is a junior synonym (available and invalid), see Enallhelia d'Orbigny, 1849: p. 11.
Evhelia Edwards and Haime 1850 is the original spelling of this genus currently spelled Euhelia in conformity with ICZN art 33.3.1. Milne Edwards and Haime (1857) themselves corrected their initial spelling. Euhelia, is the type genus of the nominal family Euheliidae which should be abandoned.
Type Species
Oculina gemmata Michelin, 1846, p. 228, pl. 54 fig. 5; Original Designation
Type Specimen: Lectotype; MNHN F.A66680; Verified; Dry Preserved
Type Locality: Bathonian (Middle Jurassic) from Langrune (Calvados, France)
A neotype R54654 was selected in the d'Orbigny's collection and figured in Beauvais 1967 p. 18, pl. 1 fig. 7. but the syntypes were recently found.
Classification
Description
Dendroid colony generally producing alternating new corallites by extracalicular increase. Theca externally costulate and finely granulated. Radial elements are compact, straight to tortuous costosepta. Distal edge apparently smooth Lateral faces with rare acute granules. Inner edge with well defined auriculae. Numerous connections of the inner edges with the columella. Microstructure unknown. Hexameral with clear hierarchy in septal length. Bilaterality visible owing to the elongation of the corallite and of the styliform columella. Endotheca not observed. Synapticulae absent. Wall probably paraseptothecal.
Remarks
The description was done with help of topotypic samples of the d'Orbigny's collection in which thin sections were made. The septal structure is very close of Stylina sensu Alloiteau or Heliocoenia sensu Etallon.
This page has been in preparation since 13-Aug-2009 10:33
This version was contributed by Bernard Lathuilière on 21-Jul-2017 14:44.
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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