20.500.12556/DiRROS-17794 Taxonomic and stratigraphic remarks on Placites urlichsi Bizzarini, Pompeckjiteslayeri (Hauer), Carnites floridus (Wulfen) and Sageceras haidingeri (Hauer) Taksonomija in stratigrafski razpon vrst Placites urlichsi Bizzarini, Pompeckjites layeri (Hauer), Carnites floridus (Wulfen) in Sageceras haidingeri (Hauer) Investigations of an Lower Carnian Wettersteinkalk ammonoid fauna found in the Hochobir massif (Carinthia/Austria) gave rise to problems in the taxonomic relationship within the Triassic ammonoid Family Pinacoceratidae. The morphological parameters of the ammonoid genus Pompeckjites are rather unclear. Morphological variation of at least two ammonoid species as Pompeckjites layeri Hauer on one end, Placites urlichsi Bizzarini on the other end have to be take into account. Numerous field surveys, studies and excavations on upper Wettersteinkalk sites within the Karavank Mountains and Hallstatt-facies sites in the Northern Calcareous Alps were implemented and compared with the reference sites in the Dolomites. As a consequence of our investigations, the Hochobir Wettersteinkalk ammonite assemblage is thought to be equivalent in time to the ammonoid fauna of the Upper San Cassian Formation. The frequent occurrence of the Julian (Lower Carnian) ammonoid Placites urlichsi Bizzarini may be a powerful tool in field investigations for a refined correlation of the upper Wettersteinkalk reef limestone to the coeval basinal facies of the Upper San Cassian Formation (Lower Carnian/upper Trachyceras aonoides Zone). As a result of this study Placites urlichsi was included in the genus Pompeckjites. This paper could be an attempt to recognize the differences in juvenile forms of Pompeckjites layeri and Placites urlichsi and other similar disciform ammonoid genera like Carnites floridus and Sageceras sp. Based on suture lines, polished transversal-sections and morphological features. Rezultati raziskave amonitne favne v spodnjekarnijskem wettersteinskem apnencu, ki se pojavlja na Obirju, na avstrijskem Koroškem, odpirajo problem v taksonomskem razlikovanju triasnih amonitov družine Pinacoceratidae. Razlikovanje na podlagi morfoloških parametrov amonitov rodu Pompeckjites je precej nejasno, pri čemer je treba upoštevati morfološke variacije najmanj dveh vrst, in sicer Pompeckjites layeri Hauer na eni ter Placites urlichsi Bizzarini na drugi strani. Številni ogledi nahajališč v zgornjem wettersteinskem apnencu Karavank in hallstattskem faciesu Severno apneniških Alp, njihova izkopavanja ter raziskave, poleg tega pa tudi primerjava z referenčnimi najdišči v Dolomitih kažejo, da je zbrana amonitna združba wettersteinskega apnenca najverjetneje časovni ekvivalent amonitni favni zgornje San Cassian formacije. Pogosto pojavljanje julijskega (spodnji karnij) amonita Placites urlichsi Bizzarini je na terenu lahko močno orodje za oceno korelacije med grebenskim zgornjim wettersteiskim apnencem ter ekvivalentnim bazalnim faciesom zgornje San Cassian formacije (spodnji karnij/zgornji del Trachyceras aonoides c one). Kot rezultat te raziskave je bil Placites urlichsi vključen v rod Pompeckjites. Pričujoči članek na podlagi suturnih linij, poliranih rezov in morfoloških značilnosti, pomaga prepoznati razliko med juvenilnimi oblikami Pompeckjites layeriin Placites urlichsi ter drugimi amoniti diskoidne oblike kot sta Carnites floridus in Sageceras sp. ammonoids Triassic Carnian Wettersteinkalk Bleiberger Sonderfazies Upper San Cassian Formation amoniti trias karnij wettersteinski apnenec pliberški facies Zgornja San Cassianska formacija true false true Geološki zavod Slovenije Angleški jezik Slovenski jezik Neznano 2024-01-15 09:59:45 2024-01-15 09:59:46 2024-01-16 03:40:57 0000-00-00 00:00:00 2023 0 0 str. 87-105 no. 1 vol. 66 2023 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2023-08-04 56 0016-7789 10.5474/geologija.2023.003 164584707 1854-Article_Text-12342461-2-10-20230804.pdf 1854-Article_Text-12342461-2-10-20230804.pdf 1 AB794BF4CD34F889857AC92810B38C95 daffb738f449ad46885f60fca5e71bcfff4b3b10ab7041285547501ac1fb7cd3 36c3cdac-b385-11ee-b0d4-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=24149 Geološki zavod Slovenije Geologija 0 0 0