Coronocyathus
Alloiteau and Tissier, 1958, 286
Coronocyathus Alloiteau and Tissier, 1958, 286 is a junior synonym (available and invalid), see Bathycyathus Milne Edwards and Haime, 1848.
Originally placed in the Turbinoliidae, but, as previously pointed out (Cainrs, 1997), the presence of an epitheca argues against that placement. Alloiteau and Tissier (1958) stated that their newly created genus Coronocyathus was characterized by 1) a parathecal and septothecal wall, 2) laterally finely dentate compact costosepta, 3) pali opposite S1 and S2, 4) a spongy columella forming twisted segments, and 5) the lack of both endothecal developments and synapticulae. However, in contrast to this statement the illustrations of the type material (Alloiteau and Tissier, 1958, pl. 1, figs 5 a–e) indicate that the specimens are characterized by a rather septothecal wall throughout their ontogenetical development, show a small number of endothecal dissepiments, and have paliform structures which, especially in younger ontogenetical stages, are not distinct from columellar developments. Therefore, Baron-Szabo (2008, p. 52) suggested the assignment to the genus Bathycyathus.
Type Species
C. goffinti Allouiteau and Tissier, 1958, p. 287, pl. 1, fig. 5.; Original Designation
Type Specimen: Syntype; ; Not Traced; Dry Preserved
Type Locality: Early Paleocene: Puits Goffint, France.
5 syntypes
Classification
Description
Corallum solitary, turbinate, slightly curved, and attached through a slender pedicel; wall septothecal and parathecal, covered with thin epitheca; costae trifurcate; pali before septa of first two cycles in two crowns; columella spongy.
Comparisons
Compared to Notocyathus and Peponocyathus by the original authors, but differs in not having pali arranged in chevrons and in having a thin epitheca.
Remarks
1 fossil species
This page has been in preparation since 08-Oct-2008 15:21
This version was contributed by Rosemarie Baron-Szabo on 02-Jul-2010 20:22.
Page authors are: Stephen D. Cairns Rosemarie Baron-Szabo. Please contact the editor if you would like to contribute to the diagnosis of this taxon.
The editor is: Stephen D. Cairns
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