New ischnacanthiform jaw bones from the Lower 
Devonian of Podolia, Ukraine

Szaniawski, Hubert; Voichyshyn, Victor

doi:10.4202/app.00456.2018

APP

2018

DOI: 10.4202/app.00456.2018

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New ischnacanthiform jaw bones from the Lower Devonian of Podolia, Ukraine

Hubert Szaniawski

Victor Voichyshyn

Abstract: Investigation of fish fauna assemblages obtained by dissolution of calcareous rock samples from Early Devonian marine deposits of

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Cited by 3 publications

References 11 publications

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About two new families of acanthodian fishes (Acanthodii)

Plax

2024

Dokl. Akad. nauk

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The article presents some information on two new families of Ptychodictyidae fam. nov. and Nostolepidae fam. nov. that were established on the basis of the author’s personal research and the available literature data. Their main diagnostic features, generic composition, number of species, comparison, stratigraphic and geographical distribution are given. The obtained data supplement the taxonomy of the Palaeozoic acanthodian fishes.

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About two new families of acanthodian fishes (Acanthodii)

Plax

2024

Dokl. Akad. nauk

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Vertebrate fauna genesis in the Middle Paleozoic Podolian paleobasin

Voichyshyn

2020

Proc. SNHM

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The formation of the Early Devonian ichthyofauna occurred under the combined influence of historical, paleogeographic and paleoecological factors. A consequence of evolutionary development at the beginning of the Devonian period arose a number of high-ranking taxa of sea vertebrates, which actively colonized the shallow water basins of new continent Laurussia. For representatives of local endemic faunas there was an opportunity to expand their habitats. There were exchanges of migrants between neighboring regional faunas. All this was accompanied by the evolution of ecosystems, the formation and development of new ecological niches. Early Devonian for most groups of vertebrates was marked by a sharp increase in the number of taxonomic units. The formation of Podillya regional ichthyofauna illustrates these trends of global biotic changes in that time.

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New cranial material of the acanthothoracid placoderm Palaeacanthaspis vasta from the Lower Devonian of Podolia – phylogenetic and taxonomic significance

Dupret

Szaniawski

Dec

et al. 2021

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The Early Devonian vertebrates of Podolia in Ukraine are well known thanks to the material of the basal arthrodire placoderm genus Kujdanowiaspis, originally mentioned by Brotzen in 1934. The anatomical fame of Kujdanowiaspis brought by Erik Stensiö almost eclipsed the presence of the acanthothoracid placoderm Palaeacanthapsis vasta in the underlying beds, with the original material of P. vasta being less well preserved and abundant than that of Kujdanowiaspis. Here we describe a newly discovered specimen of the acanthothoracid P. vasta from the Lochkovian of Podolia (Ukraine). The specimen, although incomplete, is very well preserved in three dimensions and allows a thorough description of its external morphology, which is compared to that of Romundina stellina and other well-known Acanthothoraci. A phylogenetic analysis is performed and the acanthothoracid nature of Palaeacanthaspis is confirmed. However, the position of Palaeacanthaspis within the Acanthothoraci remains uncertain, and its resemblance with Romundina could be due to either synapomorphies or symplesiomorphies. Similarities and differences between the two forms are exposed, and lead to the lack of synonymy at the specific level. Generic synonymy is also questioned for the first time but remains equivocal.

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New ischnacanthiform jaw bones from the Lower Devonian of Podolia, Ukraine

Abstract: Investigation of fish fauna assemblages obtained by dissolution of calcareous rock samples from Early Devonian marine deposits of

Cited by 3 publications

References 11 publications

About two new families of acanthodian fishes (Acanthodii)

About two new families of acanthodian fishes (Acanthodii)

Vertebrate fauna genesis in the Middle Paleozoic Podolian paleobasin

New cranial material of the acanthothoracid placoderm Palaeacanthaspis vasta from the Lower Devonian of Podolia – phylogenetic and taxonomic significance

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