Sclerangia
Baron-Szabo and Cairns, 2015, p. 2
Type Species
Sclerangia floridana Baron-Szabo and Cairns, 2015, p. 2; Original Designation
Type Specimen: Holotype; USNM I171263; Verified; Dry Preserved
Type Locality: Miocene (Chipola Formation) of the USA (Florida)
Additional material: There are five paratypes USNM I171258-I171262.
Classification
Diagnosis
Corallum colonial, plocoid to subcerioid. Budding extracalicular. Colonies always encrust shells of dead gastropods that are inhabited by sipunculids. Corallites cylindrical to subcylindrical or tympanoid. Costosepta have spiniform and rounded granules laterally, developed as in e.g., Arctangia Wells, 1937, Astrangia Milne Edwards and Haime, 1848, and Cladangia Milne Edwards and Haime, 1851. Axial edges of all septa coarsely dentate. Costae short or absent. Columella spongy-papillose or formed by irregularly shaped trabecular segments. Paliform structures irregularly present before all septa. Endotheca generally absent or made of a very small number of vesicular dissepiments. Wall parathecal and septoparathecal.
Comparisons
Sclerangia is closely related to Astrangia Milne Edwards and Haime, 1848, and Cladangia Milne Edwards and Haime, 1851, but in Astrangia, the wall is septoparathecal and is incomplete, ramose colonies are formed, and endothecal dissepiments occur throughout the colony. In Cladangia subramose and fasciculate types of polyp integration occur, extra- and intracalicular budding types are present, endothecal dissepiments occur throughout the colony, and more solid wall structures (septothecal-septoparathecal) are developed.
Distribution
This page has been in preparation since 09-May-2015 16:38
This version was contributed by Rosemarie Baron-Szabo on 09-May-2015 18:00.
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
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