Sinalosia, Ma & Sun & Hao & Liao, 2002

Ma, Xue-Ping, Sun, Yuan-Lin, Hao, Wei-Cheng & Liao, Wei-Hua, 2002, Rugose corals and brachiopods across the Frasnian- Famennian boundary in central Hunan, South China, Acta Palaeontologica Polonica 47 (2), pp. 373-396 : 386

Genus Sinalosia gen. nov.

Type species: Sinalosia rugosa sp. nov.; Late Devonian (late Frasnian), central Hunan Province, China .

Derivation of the name: Sin, from the ancient name for China; alosia, a brachiopod generic suffix commonly used in the Strophalossidina.

Diagnosis.—Small to medium sized araksalosiid with a distinct interarea, delthyrium and notothyrium closed by pseudodeltidium and chilidium, weak spines only on ventral valve and nearly parallel to shell surface, rugae prominent on both valves.

Remarks.—The presence of prominent undulose rugae indicates that the new genus should belong to the Rhytialosiinae . It is similar to Rhytialosia Lazarev, 1989 in shell shape and distinct interareas ( Brunton et al. 2000). However, the latter possesses very thick spines, a distinct cicatrix, and a dorsal median septum of full disk length. The new genus is also similar to Veeversalosia Lazarev, 1989 in shell shape and lacking strong hinge spines. However, the latter has spines on both valves and much narrower interareas. From Donalosia Lazarev, 1989 and Devonalosia Muir−Wood and Cooper, 1960 of the Donalosiinae the new genus may be distinguished by well−developed rugae on both valves and the presence of chilidium respectively.

Occurrence.—Central Hunan Province; Frasnian.

Species assigned.— Type species only.