http://hdl.handle.net/20.500.12128/14566
Tytuł: | Crinoids from Svalbard in the aftermath of the end-Permian mass extinction |
Autor: | Salamon, Mariusz A. Gorzelak, Przemysław Hanken, Nils-Martin Riise, Henrik Erevik Ferre, Bruno |
Słowa kluczowe: | Arctic; Svalbard; echinoderms; crinoids; P/T extinction; recovery |
Data wydania: | 2015 |
Źródło: | Polish Polar Research, Vol. 36, no. 3 (2015), s. 225-238 |
Abstrakt: | The end−Permian mass extinction constituted a major event in the history of cri− noids. It led to the demise of the major Paleozoic crinoid groups including cladids, disparids, flexibles and camerates. It is widely accepted that a single lineage, derived from a late Paleo− zoic cladid ancestor (Ampelocrinidae), survived this mass extinction. Holocrinid crinoids (Holocrinus, Holocrinida) along with recently described genus Baudicrinus (Encrinida), the only crinoid groups known from the Early Triassic, are considered the stem groups for the post−Paleozoic monophyletic subclass Articulata. Here, we report preliminary data on unex− pectedly diverse crinoid faunas comprising at least four orders from the Lower Triassic (Induan and Olenekian) of Svalbard, extending their stratigraphic ranges deeper into the early Mesozoic. These findings strongly imply that the recovery of crinoids in the aftermath of the end−Permian extinction began much earlier at higher palaeolatitudes than in the central Tethys. |
URI: | http://hdl.handle.net/20.500.12128/14566 |
DOI: | 10.1515/popore−2015−0015 |
ISSN: | 0138-0338 2081-8262 |
Pojawia się w kolekcji: | Artykuły (WNP) |
Plik | Opis | Rozmiar | Format | |
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Salamon_Crinoids_from_Svalbard_in_the_aftermath.pdf | 708,82 kB | Adobe PDF | Przejrzyj / Otwórz |
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