Chondrichthyan spines from the Famennian (Upper Devonian) of Russia

• Autorzy: Lebedev Oleg A. , Ivanov Alexander O. , Linkevich Valeriy V.

Identyfikatory

DOI

10.24425/agp.2020.132255

• Języki publikacji: EN

Abstrakty

EN

Very rare chondrichthyan spines from the Famennian (Upper Devonian) of European Russia are referred here to ctenacanthiforms, euselachians and a chondrichthyan group of uncertain systematic position. Ctenacanthus Agassiz, 1837 is recorded from the lower and middle Famennian of the central and north-western parts of the area. Sculptospina makhlaevi Lebedev gen. et sp. nov. originates from the lower Famennian of the Lipetsk Region. The holotype of ‘Ctenacanthus’ jaekeli Gross, 1933 and a new specimen from the upper Famennian of the South Urals are shown to belong to the same taxon, which is transferred to Acondylacanthus St. John and Worthen, 1875. New specimens of Tuberospina nataliae Lebedev, 1995 from the upper Famennian of Central Russia are described in detail. The newly presented material increases our knowledge of the composition of Famennian marine assemblages from the East European Platform. It is suggested that these assemblages may be classified as chondrichthyan-dominated and dipnoan-dominated. Hypothetically, after the end- Devonian Hangenberg extinction event, which affected numerous secondary consumers in vertebrate communities, some chondrichthyan groups could have encroached to take advantage of previously occupied ecological niches. Ctenacanthus, as well as Acondylacanthus and Amelacanthus survived the end-Devonian mass extinction to continue into the Carboniferous.

Słowa kluczowe

EN

Chondrichthyes; Ctenacanthiformes; Euselachii; fin spines; Famennian; Devonian; Russia

PL

ryby chrzęstnoszkieletowe; kolce płetw; famen; dewon; Rosja

• Wydawca: Faculty of Geology of the University of Warsaw ; Komitet Nauk Geologicznych PAN
• Czasopismo: Acta Geologica Polonica
• Rocznik: 2020
• Tom: Vol. 70, no. 3
• Strony: 339--362
• Opis fizyczny: Bibliogr. 94 poz., rys., tab.

Twórcy

autor

Lebedev Oleg A.

• A.A. Borissiak Palaeontological Institute of the Russian Academy of Sciences, Profsoyuznaya 123, Moscow 117997, Russia

autor

Ivanov Alexander O.

• Institute of Earth Sciences, St. Petersburg State University, 16 Line 29, St. Petersburg 199178, Russia
• Kazan Federal University, Kremlyovskaya 4, Kazan 420008, Russia

autor

Linkevich Valeriy V.

• E.E. Shimkevich Natural History Museum of the Andreapol District, Klenovaya 9, Andreapol 172800, Russia

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Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).