Revision of Famennian-Tournaisian (Late Devonian – Early Carboniferous) conodont biostratigraphy of Sardinia, Italy

2008 ◽  
Vol 51 (2) ◽  
pp. 123-132 ◽  
Author(s):  
Carlo Corradini
Keyword(s):  
Early Carboniferous ◽  
Late Devonian ◽  
Conodont Biostratigraphy

scholarly journals The origin and early radiation of terrestrial vertebrates

2001 ◽  
Vol 75 (6) ◽  
pp. 1202-1213 ◽  
Author(s):  
Robert L. Carroll
Keyword(s):  
Fossil Record ◽  
Early Carboniferous ◽  
Late Devonian ◽  
Lower Carboniferous ◽  
Major Transitions ◽  
Terrestrial Vertebrates ◽  
History Of ◽  
Paleozoic Tetrapods ◽  
Early Radiation ◽  
Ways Of Life

The origin of tetrapods from sarcopterygian fish in the Late Devonian is one of the best known major transitions in the history of vertebrates. Unfortunately, extensive gaps in the fossil record of the Lower Carboniferous and Triassic make it very difficult to establish the nature of relationships among Paleozoic tetrapods, or their specific affinities with modern amphibians. The major lineages of Paleozoic labyrinthodonts and lepospondyls are not adequately known until after a 20–30 m.y. gap in the Early Carboniferous fossil record, by which time they were highly divergent in anatomy, ways of life, and patterns of development. An even wider temporal and morphological gap separates modern amphibians from any plausible Permo-Carboniferous ancestors. The oldest known caecilian shows numerous synapomorphies with the lepospondyl microsaur Rhynchonkos. Adult anatomy and patterns of development in frogs and salamanders support their origin from different families of dissorophoid labyrinthodonts. The ancestry of amniotes apparently lies among very early anthracosaurs.

Late Devonian–Mississippian conodont biostratigraphy of the Chelcheli section, NE Shahrud (Eastern Alborz, North Iran)

PalZ ◽  
2021 ◽  
Author(s):  
Ali Bahrami ◽  
Peter Königshof ◽  
Christoph Hartkopf-Fröder ◽  
Sandra I. Kaiser
Keyword(s):  
Late Devonian ◽  
Conodont Biostratigraphy

scholarly journals Acherontiscus caledoniae : the earliest heterodont and durophagous tetrapod

2019 ◽  
Vol 6 (5) ◽  
pp. 182087 ◽  
Author(s):  
Jennifer A. Clack ◽  
Marcello Ruta ◽  
Andrew R. Milner ◽  
John E. A. Marshall ◽  
Timothy R. Smithson ◽  
...  
Keyword(s):  
Vertebral Column ◽  
Cladistic Analysis ◽  
Early Carboniferous ◽  
Late Devonian ◽  
Dental Morphology ◽  
Hard Tissue ◽  
Skull Length ◽  
Varied Diet ◽  
First Time ◽  
Morphological Innovation

The enigmatic tetrapod Acherontiscus caledoniae from the Pendleian stage of the Early Carboniferous shows heterodontous and durophagous teeth, representing the earliest known examples of significant adaptations in tetrapod dental morphology. Tetrapods of the Late Devonian and Early Carboniferous (Mississippian), now known in some depth, are generally conservative in their dentition and body morphologies. Their teeth are simple and uniform, being cone-like and sometimes recurved at the tip. Modifications such as keels occur for the first time in Early Carboniferous Tournaisian tetrapods. Acherontiscus , dated as from the Pendleian stage, is notable for being very small with a skull length of about 15 mm, having an elongate vertebral column and being limbless. Cladistic analysis places it close to the Early Carboniferous adelospondyls, aïstopods and colosteids and supports the hypothesis of ‘lepospondyl’ polyphyly. Heterodonty is associated with a varied diet in tetrapods, while durophagy suggests a diet that includes hard tissue such as chitin or shells. The mid-Carboniferous saw a significant increase in morphological innovation among tetrapods, with an expanded diversity of body forms, skull shapes and dentitions appearing for the first time.

The Sudetes as a Palaeozoic orogen in central Europe

1997 ◽  
Vol 134 (5) ◽  
pp. 691-702 ◽  
Author(s):  
A. ŻELAŹNIEWICZ
Keyword(s):  
Early Carboniferous ◽  
Fault Zones ◽  
Metamorphic Core Complex ◽  
Late Devonian ◽  
Core Complex ◽  
The Czech Republic ◽  
Extensional Faulting ◽  
Granitoid Intrusions ◽  
Rifted Margin ◽  
Metamorphic Core

Two metasedimentary complexes are exposed in the Sudetes Mountains of Poland, Germany and the Czech Republic. Succession I comprises pelites and greywackes of Neoproterozoic–Cambrian age, deformed and metamorphosed prior to intrusion by S-type porphyritic granites at 515–480 Ma. Succession II comprises a sandstone–mudstone–chert sequence and turbidite sequence of Ordovician–early Carboniferous age accompanied by bimodal volcanogenic rocks. Both successions were intruded by late- to post-orogenic granitoid intrusions at 340–300 Ma. The sedimentary rocks of succession II show increasing maturity until mid–late Devonian times. Inversion of the basins, commencing in late Devonian–early Carboniferous times, was reflected in the emplacement of turbidites and olistostromes, concurrent with the uplift of a metamorphic core complex of succession I rocks. The original stratigraphic order of the successions was maintained, thus crustal imbrication was not significant. Instead, extensional faulting became important, followed by transpression on almost orthogonal fault zones, resulting in the presently observed juxtaposition of crustal blocks. The Palaeozoic sequences developed in mainly ensialic basins on Cadomian and older basement, parts of which became strongly reworked (2.6 to 0.54 Ga zircon inheritance ages) and incorporated into the Palaeozoic structures. The orogen developed either on the rifted margin of peri-Gondwana or on a rifted-away fragment of pre-Baltica. The Sudetic section of the Variscan Orogen is of broadly Alpine style, with significant basement involvement, but apparently without evidence for long-lived subduction of wide oceans or the accretion of numerous exotic terranes.

Late Devonian – Early Carboniferous vertebrate microremains from the Carnic Alps, northern Italy

Geobios ◽  
2007 ◽  
Vol 40 (6) ◽  
pp. 809-826 ◽  
Author(s):  
Carine Randon ◽  
Claire Derycke ◽  
Alain Blieck ◽  
Maria Cristina Perri ◽  
Claudia Spalletta
Keyword(s):  
Early Carboniferous ◽  
Northern Italy ◽  
Late Devonian ◽  
Carnic Alps
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