Michał Ginter

University of Warsaw

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Vachik Hairapetian

Islamic Azad University, Isfahan

A. P. Ivanov

Sirius University of Science and Technology

Michael I. Coates

University of Chicago

John G. Maisey

American Museum of Natural History

Susan Turner

Queensland Museum

John A. Long

Northeast Electric Power University

Gavin C. Young

Australian National University

Tim J. Senden

Australian National University

Kate Trinajstic

Curtin University

Olga Wilk

Polish Geological Institute

Cooperative Institutions

University of Warsaw

Natural History Museum

Chinese Academy of Sciences

Universitat de València

Czech Academy of Sciences, Institute of Geology

Centre National de la Recherche Scientifique

Polish Academy of Sciences

University of Zurich

Nanjing Institute of Geology and Paleontology

Institute of Paleobiology

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Chondrichthyan fauna of the Frasnian-Famennian boundary beds in Poland

Acta Palaeontologica Polonica (2002)

Michał Ginter

New chondrichthyan microremains from several Frasnian–Famennian sections in the Holy Cross Mountains and Debnik area (Southern Poland) are investigated and compared to previous data. The reaction of different groups of chondrichthyans to environmental changes during the Kellwasser Event is analysed. Following the extinction of phoebodont sharks of Phoebodus bifurcatus group before the end of the Frasnian, only two chondrichthyan species, viz. Protacrodus vetustus Jaekel, 1921 and Stethacanthus resistens sp. nov. (possibly closely related to “Cladodus” wildungensis Jaekel, 1921), occur in the upper part of Frasnian Palmatolepis linguiformis conodont Zone and persist into the Famennian. Global cooling is considered a possible cause of the extinction of Frasnian subtropical phoe− bodonts on Laurussian margins.

Conodont

Extinction (optical mineralogy)

Late Devonian extinction

Chondrichthyes

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Citations (28)

Comments on the Late Devonian placoderms from the Holy Cross Mountains (Poland)

A. P. Ivanov Michał Ginter

Taxonomy of the Late Devonian placoderm remains from the Holy Cross Mountains, Poland, described by Gorizdro-Kulczycka (1934, 1950) and Kulczycki (1956, 1957), is revised. Several recently found specimens are also mentioned. The old collections are composed of representatives of Ptyctodontidae, Holonematidae, Plourdosteidae, Pholidosteidae, Selenosteidae, Titanichthyidae and Dinichthyidae, the latter with an undescribed species of Eastmanosteus. Newly found specimens belong to Ptyctodontidae, Plourdosteidae and Dinichthyidae. The occurrence of the Antiarcha in the Late Devonian of the Holy Cross Mountains, suggested by former authors, has not been confirmed.

Devonian

Late Devonian extinction

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Broad snouted cladoselachian with sensory specialization at the base of modern chondrichthyans

Swiss Journal of Palaeontology (2023)

Christian Klug Michael I. Coates Linda Frey Merle Greif Melina Jobbins

Abstract Throughout the Silurian and Devonian, cartilaginous fish successively evolved their specialized skeletal and dental characteristics, and increasingly refined their sensory systems. The Late Devonian shark taxon Maghriboselache mohamezanei gen. et sp. n. from the eastern Anti-Atlas of Morocco is known from multiple specimens preserving most of its skeletal features, which in some instances are preserved in three dimensions. Key details of the dentition, jaws, and pectoral skeleton are shared with the iconic genus Cladoselache . Phylogenetic analyses place the family Cladoselachidae as the sister group of symmoriiforms and these groups as sister group of the holocephalans. Further phylogenetic results corroborate that the initial evolutionary radiation of crown chondrichthyans occurred within or before the Late Devonian. Remarkably, this new stem holocephalan is equipped with a wide snout and large laterally separated nasal capsules: the earliest known example of this condition in the chondrichthyan and (perhaps) gnathostome record. This suggests sensory specialization approaching that of extant broad-rostrum elasmobranchs and represents a significant addition to increasingly apparent ecomorphological diversity among early chondrichthyans. ZooBank LSID: urn:lsid:zoobank.org:pub:85F45912-9EBA-4061-B62B-5937180E807A.

Sister group

Chondrichthyes

Devonian

Rostrum

Elasmobranchii

Late Devonian extinction

Actinopterygii

10.1186/s13358-023-00266-6

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Chondrichthyan microremains from the Givetian of the Aragonian Pyrenees (Spain)

BSGF – Earth Sciences Bulletin (2007)

Jau‐Chyn Liao Michał Ginter José Ignacio Valenzuela Ríos

Abstract A Lower and basal Middle varcus Zone (Givetian, Middle Devonian) vertebrate association consisting of chondrichtyan teeth and scales of the genus Phoebodus is documented for the first time from the Aragonian Pyrenees of Spain. This record suggests that different teeth morphologies that were previously treated as separate taxa could be grouped in Phoebodus fastigatus. Moreover, the teeth and scales association is in agreement with the previously reconstructed squamation pattern of this taxon.

Devonian

10.2113/gssgfbull.178.3.171

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Citations (13)

Late Famennian pelagic shark assemblages

Acta Geologica Polonica (2000)

Michał Ginter

Chondrichthyan microremains from a section at Soureille d'Izarne (Montagne Noire, southern France), with a new species, Thrinacodus tranqllillus sp. n., are described and compared to several other late Famennian pelagic chondrichthyan assemblages. Three general chondrichthyan biofacies are distinguished: shallow water Protacrodus biofacies; intermediate Phoebodus - Thrinacodus biofacies, characteristic of moderately deep, open shelves; and deep water falodus biofacies. The intermediate biofacies is the most widely distributed and usually yields the richest and most diverse assemblages.

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Early Frasnian sharks from central Iran

Acta Geologica Polonica (2008)

Vachik Hairapetian Michał Ginter Mehdi Yazdi

Two limestone bone-beds in the early Frasnian of the Chahriseh section, central Iran, yielded numerous chondrichthyan teeth and scales. The fauna includes, most probably, only two taxa: a hitherto unknown aztecodontid omalodontiform, Manberodus fortis gen. et sp. nov., and a multicuspid phoebodontiform, provisionally referred to as Phoebodus cf. latus GINTER & IVANOV, 1995. A new omalodontiformfamily, Aztecodontidae, including Aztecodus LONG& YOUNG, 1995 and Manberodus gen. nov., is proposed.

Chondrichthyes

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Middle Devonian thelodont Australolepis sp. (Thelodonti) from the Skały Formation, Holy Cross Mountains, Poland

Acta Geologica Polonica (2018)

Susan Turner Michał Ginter

Sparse fish microremains have been found in marine limestones from the Middle Devonian (Givetian) Skaly Formation (Sitka Coral-Crinoid Limestone Member and Sierzawy Member), Świetomarz–Śniadka section, Bodzentyn Syncline, Łysogory Region, northern Holy Cross Mountains, associated with conodonts of the hemiansatus to ansatus zones. Thelodont scales referred here to Australolepis sp. cf. A. seddoni come from near Śniadka village, from samples dated as hemiansatus to rhenanus / varcus zones. This increases the known range for the genus from its original find in Western Australia. The presence of a thelodont in the late Middle Devonian in Poland extends the known distribution of turiniids around the peri-Gondwana shorelines of Palaeotethys.

Devonian

Syncline

Crinoid

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Citations (1)

Late Famennian shark teeth from the Holy Cross Mts, Central Poland

Acta Geologica Polonica (1990)

Michał Ginter

Late Famennian shark teeth, mostly of the phoebodonts, have been found in the residues of conodont samples from the Holy Cross Mts, Central Poland. Two new species of the genus Phoebodus , viz. Ph. gothicus sp. n. and Ph. limpidus sp. n., have been established. Provisional stratigraphic ranges of the three most significant species: Thrinacodus ferox (TURNER), Phoebodus australiensis LONG and Ph. gothicus sp. n. have been correlated with international data.

Conodont

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Citations (40)

Middle/Late Devonian Phoebodontbased ichthyolith zonation

Geobios (1995)

Michał Ginter Alexander O. Ivanov

Conodont

Devonian

Late Devonian extinction

10.1016/s0016-6995(95)80137-5

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Citations (22)

Famennian chondrichthyans from the shelves of North Gondwana

Acta Geologica Polonica (2002)

Michał Ginter Vachik Hairapetian Christian Klug

Ichthyoliths, mainly shark teeth, from the Famennian of Iran and Northwest Africa are described. Evolution of shallow-water chondrichthyan assemblages on the shelves of Central Iran and the Tafilalt Platform, Morocco, related to time and environmental changes, is discussed. Four new taxa, viz. Deihim mansureae gen. et sp. nov., Protacrodus serra sp. nov., Phoebodus depressus sp. nov., and Ph. gothicus transitans subsp. nov. are erected and provisional reconstructions of heterodonty in dentitions of several Famennian sharks are proposed.

Chondrichthyes

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Citations (77)