20.500.12556/DiRROS-18943 Rare Middle Triassic coleoids from the Alpine-Carpathian system: new records from Slovakia and their signifcance Two stratigraphically well constrained (by ammonites and conodonts) coleoid remains have been recorded from the Triassic (Anisian) dark-grey organodetritic limestones (Ráztoka Limestone) of Western Carpathians (Hronic Nappe). The limestones deposited at the periphery of a former carbonate platform. It yields a highly diverse cephalopod fauna including nautiloids (2 taxa), ammonoids (7 taxa) and indetermined aulacoceratids. Two unusual coleoid specimens are referred to genus Mojsisovicsteuthis (M. boeckhi) and probably to a new taxon (described as Breviconoteuthis aff. breviconus herein) possessing similar morphological features of genus Breviconoteuthis (Phragmoteuthida) and/or Zugmontites. Based on index ammonites and conodonts, both records are of the uppermost Trinodosus through the lowermost Reitzi zones (Anisian—lower Illyrian). While the genus Mojsisovicsteuthis has been widely dispersed (however its records are rare), the occurrence of Breviconoteuthis and Zugmontites is strictly limited to the Alpine-Carpathian region. Comparing with the holotype and additional specimens stored in the Hungarian Natural History Museum, the overal shell of Mojsisovicsteuthis and its size has been reconstructed. Its relationship to aulacoceratids and phragmoteuthids is briefly discussed. Geochemical record (n-alkanes from the bulk rock) provided a relevant signal of the existence of algal meadows. Cephalopods Conodonts Anisian Palaeoenvironment true false true Springer Nature Angleški jezik Ni določen Neznano 2024-05-17 03:34:36 2024-05-21 10:57:57 2024-05-22 03:35:24 0000-00-00 00:00:00 2024 0 0 19 str. vol. 143 2024 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2024-05-08 56 1664-2384 10.1186/s13358-024-00316-7 195609603 s13358-024-00316-7_(3).pdf s13358-024-00316-7_(3).pdf 1 2B72987D4B1FA8633027EDEEAFE09476 d817407abb9b44d20c29e772fbe4988755ee62780e3a13d137f16586d4b0d53a 7167d75e-1751-11ef-9c9e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=25993 https://web.natur.cuni.cz/ugp/main/paleodata/brevicono1 0 c26e5e5d-1751-11ef-9c9e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=25994 https://web.natur.cuni.cz/ugp/main/paleodata/brevicono2 0 d3532218-1751-11ef-9c9e-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=25995 Geološki zavod Slovenije 0 0 0