Tracking 'transitional' diadectomorphs in the earliest Permian of equatorial Pangea.

Autor:	Calábková G; Department of Geology and Paleontology, Moravian Museum, Brno, Czech Republic.; Department of Geological Sciences, Faculty of Science, Masaryk University, Brno, Czech Republic., Madzia D; Department of Evolutionary Paleobiology, Institute of Paleobiology, Polish Academy of Sciences, Warsaw, Poland., Nosek V; Department of Archaeology and Museology, Faculty of Arts, Masaryk University, Brno, Czech Republic., Ivanov M; Department of Geological Sciences, Faculty of Science, Masaryk University, Brno, Czech Republic.
Jazyk:	angličtina
Zdroj:	PeerJ [PeerJ] 2023 Dec 06; Vol. 11, pp. e16603. Date of Electronic Publication: 2023 Dec 06 (Print Publication: 2023).
DOI:	10.7717/peerj.16603
Abstrakt:	Diadectomorpha was a clade of large-bodied stem-amniotes or possibly early-diverging synapsids that established a successful dynasty of late Carboniferous to late Permian high-fiber herbivores. Aside from their fairly rich record of body fossils, diadectomorphs are also well-known from widely distributed tracks and trackways referred to as Ichniotherium . Here, we provide detailed description of a diadectomorph trackway and a manus-pes couple originating from two different horizons in the Asselian (lowermost Permian) of the Boskovice Basin in the Czech Republic. The specimens represent two distinct ichnotaxa of Ichniotherium , I. cottae and I. sphaerodactylum . Intriguingly, the I. cottae trackway described herein illustrates a 'transitional' stage in the posture evolution of diadectomorphs, showing track morphologies possibly attributable to a Diadectes -like taxon combined with distances between the successive manus and pes imprints similar to those observable in earlier-diverging diadectomorphs, such as Orobates . In addition, this trackway is composed of 14 tracks, including six well-preserved manus-pes couples, and thus represents the most complete record of Ichniotherium cottae described to date from the Asselian strata. In turn, the manus-pes couple, attributed here to I. sphaerodactylum , represents only the second record of this ichnotaxon from the European part of Pangea. Our study adds to the diversity of the ichnological record of Permian tetrapods in the Boskovice Basin which had been essentially unexplored until very recently. Competing Interests: The authors declare that they have no competing interests. (© 2023 Calábková et al.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu