Palocyathus
Filkorn, 1994, p. 57
Type Species
P. seymourensis Filkorn, 1994, p. 57, fig. 19; Original Designation
Type Specimen: Holotype; USNM 93050; Verified; Dry Preserved
Type Locality: Late Cretaceous: Seymour Island, Antarctic Peninsula
Classification
Diagnosis
Corallum trochoid, with pointed base and circular cross section; GCD up to 7 mm; theca imperforate, but exteriorly pitted; costae beaded or serrate, originating by trifurcation; septa hexamerally arranged in 4 cycles; P2 and P3 present, usually fuse with a system; columella papillose.
Comparisons
Similar but differs from Bothrophoria in having P2-3, not P1-3.
Remarks
This genus and family was monographed by Cairns (1997), which included a phylogenetic analysis based on morphology. The genus is monotypic and thus far is known only from the original description.
Distribution
- Antarctica; Late Cretaceous
Cairns 1997: 1k, 4kThis page has been in preparation since 10-Jan-2008 20:24
This version was contributed by Stephen D. Cairns on 18-Nov-2008 20:16.
Page authors are: Stephen D. Cairns. Please contact the editor if you would like to contribute to the diagnosis of this taxon.
The editor is: Rosemarie Baron-Szabo
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