Lower and Middle Jurassic ammonoids of the Shemshak Group in Alborz, Iran, and their palaeobiogeographical and biostratigraphical importance

Seyed-Emami K, Fürsich F, Wilmsen M, Majidifard MR, Shekarifard A (2008)

Publication Language: English

Publication Type: Journal article

Publication year: 2008

Journal

Acta Palaeontologica Polonica Polska Akademia Nauk, Instytut Paleobiologi (Polish Academy of Sciences, Institue of Paleobiology)

Publisher: Polska Akademia Nauk

Book Volume: 53

Pages Range: 237-260

Journal Issue: 2

DOI: 10.4202/app.2008.0206

Abstract

The Shemshak Group at Shahmirzad (northern Iran) is characterized by the most frequent and extensive marine intercalations and contains the most abundant and diverse ammonite faunas hitherto known from the Lower and lower Middle Jurassic strata of the Alborz Range. So far, 62 ammonite taxa have been recorded from this area, including 25 taxa from earlier studies. The taxa belong to the families Cymbitidae, Echioceratidae, Amaltheidae, Dactylioceratidae, Hildoceratidae, Graphoceratidae, Hammatoceratidae, Erycitidae, and Stephanoceratidae with the new species Paradumortieria elmii and Pleydellia (P.?) ruttneri. The fauna represents the Late Sinemurian, Late Pliensbachian, Toarcian, Aalenian, and Early Bajocian. Palaeobiogeographically, it is closely related to the Northwest European (Subboreal) Province, and exhibits only minor relations with the Mediterranean (Tethyan) Province.

Authors with CRIS profile

Franz Fürsich Naturwissenschaftliche Fakultät Markus Wilmsen Naturwissenschaftliche Fakultät

Involved external institutions

University of Tehran IR Iran, Islamic Republic of (IR)

How to cite

APA:

Seyed-Emami, K., Fürsich, F., Wilmsen, M., Majidifard, M.R., & Shekarifard, A. (2008). Lower and Middle Jurassic ammonoids of the Shemshak Group in Alborz, Iran, and their palaeobiogeographical and biostratigraphical importance. Acta Palaeontologica Polonica, 53(2), 237-260. https://dx.doi.org/10.4202/app.2008.0206

MLA:

Seyed-Emami, Kazem, et al. "Lower and Middle Jurassic ammonoids of the Shemshak Group in Alborz, Iran, and their palaeobiogeographical and biostratigraphical importance." Acta Palaeontologica Polonica 53.2 (2008): 237-260.

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