Diversity changes of the Brachiopods in the Northern Caucasus: a brief overview

Dmitry A. Ruban

doi:10.1556/ageol.49.2006.1.4

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Acta Geologica Hungarica

Volume/Issue:: Volume 49: Issue 1

Diversity changes of the Brachiopods in the Northern Caucasus: a brief overview

Author:

Dmitry A. Ruban

Dmitry A. Ruban Tchistopolskaja st., 3, app. 10, Rostov-na-Donu, 344032, Russian Federation

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Pages:: 55–71

Online Publication Date:: 08 Jun 2006

Publication Date:: 01 Mar 2006

Article Category:: Research Article

DOI:: https://doi.org/10.1556/ageol.49.2006.1.4

Keywords:: diversity; brachiopods; mass extinctions; reefs; Paleozoic; Mesozoic; Caucasus

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The diversity of the brachiopods in the Northern Caucasus significantly fluctuated throughout the Paleozoic-Mesozoic. Weak diversifications occurred in the Middle Cambrian, Late Silurian - Early Devonian, and Late Devonian - Early Carboniferous. Since the Late Permian brachiopod assemblages became quite diverse. The maximum number of species was reached in the Rhaetian. The Permian/ Triassic mass extinction and enigmatic Ladinian crisis, on the other hand, led to regional brachiopod demises. In the Jurassic - Early Cretaceous interval the diversity of brachiopods generally decreased. The strongest drops of species numbers occurred in the Toarcian and Berriasian following the Pliensbachian-Toarcian and end-Jurassic global mass extinctions, and in the Kimmeridgian due to the regional salinity crisis. It is evident that some of the regional brachiopod diversifications coincided with the development of rimmed shelves.

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Acta Geologica Hungarica

Print ISSN:: 0236-5278

Online ISSN:: 1588-2594

Acta Geologica Hungarica
Language	English
Size
Year of Foundation	1952
Publication Programme	changed title
Volumes per Year
Issues per Year
Founder	Magyar Tudományos Akadémia
Founder's Address	H-1051 Budapest, Hungary, Széchenyi István tér 9.
Publisher	Akadémiai Kiadó
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5278 (Print)
ISSN	1588-2594 (Online)