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2009•Memoir ... of the Association of Australasian PalaeontologistsRequires access

Middle Ordovician (Late Darriwilian) Trilobites from the Northern Betpak-Dala Desert, Central Kazakhstan

Mansoureh Ghobadi Pour, Leonid E. Popov, Elena A. Vinogradova

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Abstract

A trilobite assemblage of late Darriwilian age is described from the northern Betpak-Dala Desert, central Kazakhstan. The fauna consists of a number of new taxa including the illaenid Alperillaenus intermedius gen. et sp. nov., the asaphids Damiraspis margiana gen. et sp. nov., and Farasaphus singularis gen. et sp. nov., along with representatives of the genera Ceraurinella?, Pliomerina, Eorobergia and Sphaerexochus. The composition of the assemblage approaches the globally recognised asaphid-illaenid biofacies characteristic of the Benthic Assemblage Zone 2. This fauna is distinct from contemporaneous trilobite associations of South China, but shows some similarity to Late Ordovician (Eastonian) trilobite faunas from New South Wales, Australia.

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What this paper is about

A trilobite assemblage of late Darriwilian age is described from the northern Betpak-Dala Desert, central Kazakhstan. The fauna consists of a number of new taxa including the illaenid Alperillaenus intermedius gen. et sp. nov., the asaphids Damiraspis margiana gen. et sp. nov., and Farasaphus singularis gen. et sp. nov., along with representatives of the genera Ceraurinella?, Pliomerina, Eorobergia and Sphaerexochus. The composition of the assemblage approaches the globally recognised asaphid-illaenid biofacies characteristic of the Benthic Assemblage Zone 2. This fauna is distinct from contemporaneous trilobite associations of South China, but shows some similarity to Late Ordovician (Eastonian) trilobite faunas from New South Wales, Australia.

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Available abstract

A trilobite assemblage of late Darriwilian age is described from the northern Betpak-Dala Desert, central Kazakhstan. The fauna consists of a number of new taxa including the illaenid Alperillaenus intermedius gen. et sp. nov., the asaphids Damiraspis margiana gen. et sp. nov., and Farasaphus singularis gen. et sp. nov., along with representatives of the genera Ceraurinella?, Pliomerina, Eorobergia and Sphaerexochus. The composition of the assemblage approaches the globally recognised asaphid-illaenid biofacies characteristic of the Benthic Assemblage Zone 2. This fauna is distinct from contemporaneous trilobite associations of South China, but shows some similarity to Late Ordovician (Eastonian) trilobite faunas from New South Wales, Australia.

Key concepts: Trilobite, Ordovician, Fauna, Assemblage (archaeology), Paleontology, Biozone, Geology, Taxon

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Middle Ordovician (Late Darriwilian) Trilobites from the Northern Betpak-Dala Desert, Central Kazakhstan — Research Paper | ScholarLens