Arctangia
Wells, 1937, p. 13
Type Species
Thecocyathus nathorsti Lindstrom, 1900: 9, text-figs 1-8; Original Designation Wells, 1937: 13 (247), text-figs. 2a–e.
Type Specimen: Holotype; unknown; Lost; Unknown
Type Locality: Lower Cretaceous (Valanginian-Hauterivian) of Svalbard ‘Spitzbergen’, King Charles Island, Arctica).
The ?holotype of the type species is housed at NRM (Stockholm) under PZ-Cn 2.
Classification
Diagnosis
Solitary coral, turbinate to subturbinate, fixed by small base. Costosepta irregularly perforated, dentate laterally. Endothecal dissepiments thin and vesicular, sparse. Paliform structures irregularly present, mainly before S1–S3. Wall septoparathecal and synapticuloparathecal. Costae weakly developed, incorporated by epithecal stereome.Eepitheca multilamellar.
Remarks
The genus Arctangia Wells is a poorly known group that consists of only the type species Thecocyathus nathorsti Lindstrom, 1900. The original description is the only documentation of the species. Including the first description of the genus Arctangia by Wells (1937), all of the later interpretations of the species represent only adaptations of Lindstrom’s original report. Baron-Szabo (2005) presented a paper giving the re-description of the type species and also providing the first photographic images of this species based on newly discovered material. (NRM-PZ Cn 2, Naturhistoriska Riksmuseet, Stockholm, Sweden).
This page has been in preparation since 02-Jun-2007 12:35
This version was contributed by Rosemarie Baron-Szabo on 14-Sep-2010 14:40.
Page authors are: Rosemarie Baron-Szabo. Please contact the editor if you would like to contribute to the diagnosis of this taxon.
The editor is: Rosemarie Baron-Szabo
|