Filkorn, 1994, p. 60
A. nordenskjoeldi Filkorn, 1994, p. 62, fig. 21; Original Designation
Type Specimen: Holotype; USNM 92996; Verified; Dry Preserved
Type Locality: Late Cretaceous (Maastrictian): Seymour Island, Antarctic Peninsula
Corallum trochoid, with a pointed base and circular in cross section; GCD up to 8 mm; theca imperforate but externally pitted; costae serrate, originating by trifurcation; septa hexamerally arranged in 4 cycles; 1 crown of 6P2; columella papillose.
Differs from Laminocyathus in having a papillose columella.
This genus and family was monographed by Cairns (1997), which included a phylogenetic analysis based on morphology. Monotypic, known form few specimens.
Cairns 1997: figs. 2c, 5e
- Antarctica; Late Cretaceous
This page has been in preparation since 09-Jan-2008 14:09
This version was contributed by Stephen D. Cairns on 18-Nov-2008 20:29.
Page authors are: Rosemarie Baron-Szabo Stephen D. Cairns Francesca Benzoni. Please contact the editor if you would like to contribute to the diagnosis of this taxon.
The editor is: Rosemarie Baron-Szabo