New Early Jurassic brachiopods from the Western Tethys (Eastern Subbetic, Spain) and their systematic and paleobiogeographic affinities

作者：Francisco Baeza Carratala Jose

来源：Geobios, 2011, 44(4): 345-360.

DOI：10.1016/j.geobios.2010.09.003

• Brachiopod
• Early Jurassic
• Subbetic
• Systematics
• Mediterranean bioprovince

Two new brachiopod genera (Alebusirhynchia and Praesphaeroidothyris), five new species (Alebusirhynchia jorali, Salgirella? goicoecheai, Praesphaeroidothyris cisnerosi, Lychnothyris lancisi, and Cincta peiroi) and a new combination (Securina plicata) have been recorded and established after the internal and external morphological study of populations attributed to Lower Jurassic carbonate successions of the South-Iberian Paleomargin (SE Spain). The analysis made enables us to detail the diagnostic characters of little-known genera such as Lychnothyris or Securina and to clarify the systematics of the group from new supraspecific definitions, establishing a new, strongly multicostate rhynchonellid genus (Alebusirhynchia) and a new smooth terebratulid genus (Praesphaeroidothyris). The palaeobiogeographic signature of these taxa has been analysed, revealing remarkable Mediterranean affinities. Thus, the previously restricted geographical distribution of these faunas can be extended to the westernmost Tethys areas, where the maximum degree of endemism is established for the brachiopod groups in the Subbetic domain around the Sinemurian-Pliensbachian transition.

• 出版日期2011-8