Articles

PERMIAN BRACHIOPODS FROM KARAKORUM (PAKISTAN). Pt.1

LUCIA ANGIOLINI

Abstract


Five brachiopod associations were collected in the Permian successions of N Karakorum (Pakistan). The aim of this work is to describe the two oldest brachiopod assemblages. The oldest association has been assembled in the Asselian-Early Sakmarian Gircha  Fm. It has been named Trigonotreta lyonsensis/Punctospirifer afghanus assemblage and it is characterized by low diversity and dominance of spiriferids, indicating cold climate conditions. The  second assemblage was collected  in the Sakmarian Lupghar Fm., Mb.1 of Upper Hunza valley and in the Sakmarian  Lashkargaz  Fm., Mb. 1 of Baroghil and Lashkargaz (Chitral). It has beennamed Hunzina electa gen. n. sp. n. assemblage and it is characterized by higher diversity than the oldest one, indicating warmer climate conditions. Furthermore Hunzina electa gen. n. sp. n. represents a marker in almost all the stratigraphic sections of N Karakorum. In the appendix two new genera, one new subgenus and nine new species of brachiopods collected in the Bolorian to Murgabian-Midian of Northern  Karakorum are named and described.

Keywords

Brachiopods; New genera; New species; Biostratigraphy; Karakorum; Asselian; Sakmarian.

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DOI: https://doi.org/10.13130/2039-4942/8574

NBN: http://nbn.depositolegale.it/urn%3Anbn%3Ait%3Aunimi-22501

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