Thirteen species of rugose corals, belonging to nine genera are described from the Givetian and Lower Frasnian rocks of theKhoshyeilagh Formation in the Eastern Alborz Mountains (northeastern Iran). Glossophyllum ceratites (Goldfuss), Glossophyllum sp.,Keriophyllum cf. maillieuxi (Tsien), Pseudozaphrentis sp., Temnophyllum imperfectum Coen-Aubert, Temnophyllum occidentale Hilland Jell, Temnophy...

thirteen species of rugose corals, belonging to nine genera are described from the givetian and lower frasnian rocks of thekhoshyeilagh formation in the eastern alborz mountains (northeastern iran). glossophyllum ceratites (goldfuss), glossophyllum sp.,keriophyllum cf. maillieuxi (tsien), pseudozaphrentis sp., temnophyllum imperfectum coen-aubert, temnophyllum occidentale hilland jell, temnophy...

Research subject. Late Givetian-Early Frasnian brachiopods, conodonts and spores of higher plants from the Timan Horizon borehole No. 8 Tsarichankaya. Material methods. The biostratigraphical me thod was used to isolate fossils determine taxonomic compositions plant deposits drilled by Tsarichanskaya (interval 3637.00–3647.00 m), substantiate their age carry out a correlation. An improved techn...

frasnian - famennian boundary in the kal-e-sardar section (east of tabas, central iran) is investigated on the basis of conodonts. distribution of thirty-three species and subspecies in the stratigraphic column enables us to recognize a barren interval and five biozones; upper rhenana, upper part of upper rhenana - linguiformis, lower to middle triangularis, upper triangularis, lower crepida. b...

As the sister lineage of all other actinopterygians, the Middle to Late Devonian (Eifelian-Frasnian) Cheirolepis occupies a pivotal position in vertebrate phylogeny. Although the dermal skeleton of this taxon has been exhaustively described, very little of its endoskeleton is known, leaving questions of neurocranial and fin evolution in early ray-finned fishes unresolved. The model for early ac...

Accurate palyno-analysis by S. Loboziak (from 1980 to 1983) of 28 samples from the Upper Givetian Middle Frasnian Blacourt, Beaulieu and Ferques Formations 44 Lower Famennian Hydrequent Formation are re-evaluated. Chelinospora concinna, Verrucosisporites bulliferus, Cirratriradites jekhowskyi, Lophozonotriletes media first occurrences major criteria for Frasnian, well calibrated conodonts. Cymb...

about 35 samples were collected from lower and upper parts of the proposed frasnianamennian boundary in three sections of upper devonian marine sediments of the kerman province. the biostratigraphical and geochemical studies indicate that about 45% extinction of brachiopods probably caused by the frasnian-famennian bioevents, which is slightly higher than thr rate of devonian-carboniferous exti...

Abstract The cosmopolitan genus Gondwanaspis is one of two post-Taghanic (late Givetian to Frasnian) odontopleurid genera and the only Odontopleurida surviving Lower Kellwasser Event, finally disappearing at Upper Event. Although it known from Frasnian Australia, Germany, France, Morocco, Russia, findings are comparatively rare. Here we present eisbornensis n. sp. probable lower Beul section ne...

About 35 samples were collected from lower and upper parts of the proposed Frasnianamennian boundary in three sections of Upper Devonian marine sediments of the Kerman province. The biostratigraphical and geochemical studies indicate that about 45% extinction of brachiopods probably caused by the Frasnian-Famennian bioevents, which is slightly higher than thr rate of Devonian-Carboniferous exti...

The Frasnian carbonate-siliciclastic deposits of the Stipinai Formation exposed in two quarries at Petraši?nai and Klovainiai (northern Lithuania) show considerable vertical facies changes. lower part this succession is dominated by argillaceous dolomitic with subordinate fine siliciclastic deposits. They display haloturbation bioturbation structures, represent a hypersaline lagoonal environmen...