Cycloria

Reuss, 1854, p. 110-111

Type Species

Leptoria patellaris Reuss, 1854, p. 110-111, pl. 14, figs. 9-12; Subsequent Designation Reuss, 1854, p. 110-111

Type Specimen: Syntype; ; Not Traced; Unknown

Type Locality: Upper Santonian of Austria (Neue Welt, Piesting).

The syntype NHMW 1864/0040/1343 of the type species is housed at the Natural History Museum (Vienna). Recently, the genus Cycloria has been revised (Baron-Szabo, 2014a, p. 23, Pl. 6, Figs. 2-5, pl. 7, figs. 1-11).

Classification

• Family: Mussidae Ortmann, 1890, p. 315

Synonyms

• Anisoria Vidal, 1917, p. 5
• Diplothecophyllia Alloiteau, 1952, p. 609
• Meandroria Alloiteau, 1952, p. 635
• Orbignygyra Alloiteau, 1952, p. 635
• Prohydnophyllia Reig Oriol, 1994, p. 23

Diagnosis

Colonial, massive, meandroid. Intracalicinal-terminal and extracalicinal-marginal budding, producing long, straight or wavy, ramified calicinal series, separated by tectiform and tholiform collines. Calicinal centers mainly indistinct to subdistinct. Distinct corallite centers occasionally present. Costosepta compact, confluent, subconfluent, or non-confluent, finely granulated or strongly beaded laterally and have occasionally the tendency to produce crispate features costally and ?carinae laterally. Costae are bi- and trifurcated on outer edge. Ambulacra irregularly present, generally very reduced or absent. Endothecal dissepiment thin. Perithecal dissepiments vesicular. Exotheca absent. Columella lamellar, discontinuous. Wall parathecal and septothecal.

Comparisons

Affinities: Similar to Dictuophyllia Blainville, 1830, but differs from it in lacking an exotheca, and having both extracalicinal-marginal budding and distinct corallite centers.

Remarks

Reuss (1854, p. 110–111, pl. 14, figs. 9–12) described the form Leptoria patellaris and noted that it differed from the genus Leptoria in its septal and columellar developments. Therefore, he suggested to use it to create his new genus Cycloria (“… Dürfte wohl den Typus einer eigenen Gattung bilden, die den Namen Cycloria führen könnte.”). Because this remark is hidden within the description of the species of Leptoria patellaris, it was overlooked by many workers for over a century. While Reuss’ genus has hardly been ever used, it does, however, not fall under the nomen oblitum rule, as the type material of the type species is available and it was used after the year 1899 by Oppenheim (1930a, p. 237, pl. 28, figs. 3–3b). Based on the development of costal, septal, and thecal features, Reuss’ genus corresponds to the fairly well-known genus Orbignygyra Alloiteau, 1952a, over which it takes priority..............Recently, Budd et al. (2012) carried out studies integrating molecular and morphological data on several genera which have traditionally been considered ‘faviid’. Based on their results by taking into consideration skeletal microstructure and septal ornamentation, the genus Cycloria shows a resemblance to Manicina. Therefore, it has been transferred to the family Mussidae (Baron-Szabo, 2014a, p. 24).

Distribution

• Central Europe; Late Cretaceous

This page has been in preparation since 02-Jun-2007 12:35

This version was contributed by Rosemarie Baron-Szabo on 26-Dec-2014 16:52.

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