Английская Википедия:Ceratobairdia
Шаблон:Short description Шаблон:Automatic taxobox
Ceratobairdia is an extinct genus of ostracod (seed shrimp) belonging to the order Podocopida and family Bairdiidae.[1] Specimens have been found in Permian[2] to Jurassic[3] beds in North America,[2] China,[4] and Europe.[3]
The genus is heavily ornamented,[5] and a distinctive characteristic is that its valves (shells) have a flat ventral surface and a ventrolateral alate ridge (a winglike ridge extending from the ventral surface to the side of the valve.)[6] The genus is also notable as a Lazarus taxon, disappearing in the Permian-Triassic extinction event and reappearing in the Carnian,[5] an interval of at least 15 million years.
Species
- C. ambigua Ishizaki 1964[4]
- C. dorsospinosa Sohn 1954[2]
- C. sinensis Wang 1978[1]
- C. triassica Bolz 1971[3]
- C. venterocostata Wang 1978[7]
- C. xiaobaensis Xie 1989[8]
References
