New data on lower Permian rugose corals from the Southern Karavanke Mountains (Slovenia)

Studies of upper Palaeozoic corals from the Southern Alps (Karavanke Mountains in Slovenia and Carnic Alps along the Austrian/Italian border) started at the end of the 19th century. Since the mid-20th century, corals of the Karavanke Mountains have been studied in detail by several authors. Recently, several coral type localities and the coral groups occurring therein have been einvestigated. This paper deals in particular with the study of Carinthiaphyllum Heritsch, 1936 and all previously known data have been revised within this study. Most specimens of Carinthiaphyllum originate from museum collections and from new findings in the Dovžanova Soteska area of northern Slovenia. Additional material is represented by newly found samples from the locality of Mt. Boč in eastern Slovenia. The stratigraphic position and age of the Carinthiaphyllum occurrences are determined by fusulinid and conodont assemblages. Two species, Carinthiaphyllum crasseseptatum Gräf & Ramovš, 1965 and C. ramovsi n. sp., are described herein. New morphological features, including root-like protrusions and connecting stereoplasmic tubes, have been found for the first time in gregaria growth mode. Therefore, these new observations provide evidence of a solitary gregaria growth mode: individuals are invariably separated with contact and reciprocal support only by root-like, sometimes channeled tubes occurring as outgrowths of the archaeothecal wall. An emended diagnosis of Carinthiaphyllum is proposed herein. The studied collection is housed in the Museum für Naturkunde (Leibniz-Institut) at the Humboldt University in Berlin

Evolution trends in Middle Carboniferous Petalaxidae (Rugosa)

Volume: 20Start Page: 663End Page: 68

Tendances évolutives des Petalaxidae (Rugosa) du Carbonifère moyen

Des aspects variés de l\u27étude des Petalaxidae Fomichev, 1953, sont considérés dans cette publication. Des observations détaillées provenant d\u27investigations anciennes et récentes, des données plus précises sur la distribution stratigraphique des Petalaxidae dans la partie septentrionale et centrale de la plate-forme russe sont utilisées comme un guide pour la reconstruction phylogénétique. Cinq groupes morphologiques principaux sont reconnus dans Petalaxis Milne Edwards et Haime, 1852, fondés sur la combinaison de caractères stables et variables prédominant dans chaque groupe. La principale tendance évolutive des Petalaxidae pendant le Bashkirien et le Moscovien est une croissance dans l\u27intégration coloniale et la stabilisation de la structure septale multitrabéculée. La diagnose et le nombre d\u27espèces sont donnés par taxons inclus dans les Petalaxidae, d\u27après la révision de l\u27auteur. Quatre nouveaux taxons sont décrits : Donastraea n.g., Ivanovia (Procystophora) n.sg., Petalaxis (Petalaxis) primitivum n.sp. and P. (P.) gigas n.sp.Various aspects of the study of the Petalaxidae Fomichev, 1953 are considered. Detailed observations from previous investigations together with new, more precise data on the stratigraphic distribution of the Petalaxidae in the northern and central part of the Russian Platform are used as a framework for phylogenetic reconstruction. Five main morphological groups are recognized within Petalaxis Milne Edwards et Haime, 1852, based on the combination of stable and variable features predominant in each group. The main trend in Petalaxidae evolution during the Bashkirian and Moscovian stages is an increase in the colony integration and the stabilization of multitrabecular septal structure. The diagnosis and species content are given for taxa included in Petalaxidae after authors revision. Four new taxa are described: Donastraea n.g., Ivanovia (Procystophora) n.sg., Petalaxis (Petelaxis) primitivum n.sp. and P. (P. ) gigas n.sp.</p

New data on the Serpukhovian (Carboniferous) coral assemblages from the northwestern part of the Moscow Basin (Russia)

Research in two quarries of the Borovichi area near the Uglovka town (northwestern Moscow Basin) has provided several rugose and tabulate corals that improve the knowledge on the palaeontology of that area. The Zarech’e quarry yielded rare specimens of Syringopora reticulata and Dibunophyllum bipartitum, as well as common specimens of Actinocyathus floriformis, A. borealis and A. crassiconus. The Uglovka quarry provided also Syringopora reticulata, Dibunophyllum bipartitum but different species of colonial rugosans: Actinocyathus sp., Lonsdaleia multiseptata and Schoenophyllum sp. The palaeogeographical distribution of the recorded species indicates a good communication of the Eastern European Basin with western and eastern Palaeotethys during the Serpukhovian. The presence of the genus Schoenophyllum suggests also connection with North America, probably along the northern coast of Laurussia

Stratigraphic correlations between the continental and marine Tethyan and Peri-Tethyan basins during the Late Carboniferous and the Early Permian

Volume: 20Start Page: 521End Page: 59