The tarphyceratid cephalopod .i.Trocholites./i. in the Middle–Upper Ordovician of the Prague Basin —the Baltican element in peri-Gondwana

0575919 - GLÚ 2024 RIV PL eng J - Journal Article
Aubrechtová, Martina - Turek, V. - Manda, Š.
The tarphyceratid cephalopod Trocholites in the Middle–Upper Ordovician of the Prague Basin —the Baltican element in peri-Gondwana.
Acta Palaeontologica Polonica. Roč. 68, č. 3 (2023), s. 529-538. ISSN 0567-7920. E-ISSN 1732-2421
Institutional support: RVO:67985831
Keywords : Tarphyceratida * Trocholites * micro CT * Darriwilian * Sandbian/Katian * Prague Basin * Baltica * peri-Gondwana
OECD category: Paleontology
Impact factor: 1.8, year: 2022
Method of publishing: Open access
https://www.app.pan.pl/archive/published/app68/app010882023.pdf

The vast majority of cephalopods of the order Tarphyceratida are known from regions that were located at mid- or low palaeolatitudes during the Ordovician (mainly Baltica, Laurentia, and Chinese palaeoblocks). Only a handful of tarphyceratid specimens are known from high palaeolatitude regions of peri-Gondwana and Gondwana. Here, we describe the two best-preserved trocholitid cephalopods known to date from the Ordovician of the Prague Basin. The first is from the late Darriwilian/early Sandbian Dobrotivá Formation and is assigned to Trocholites fugax, a species previously recorded from roughly coeval strata of Iberia, France, and Bohemia. The specimen thus strengthens previous hypotheses regarding the interchange of non-benthic faunas between Baltica and different regions of peri-Gondwana during the Middle/Late Ordovician boundary interval. The second specimen, assigned to a new species of Trocholites chaloupkai sp. nov., is from the late Sandbian–early Katian Zahořany Formation and thus represents one of the stratigraphically youngest Trocholites in the Ordovician of peri-Gondwana. Internal structures of the shell of the holotype of the new species were studied using micro-CT tomography. This revealed that T. chaloupkai sp. nov. closely resembles the stratigraphically older (Darriwilian) species Trocholites depressus from Estonia.
Permanent Link: https://hdl.handle.net/11104/0346231