Journal : Acta Geologica Polonica
Article : Dobrogeria aegyssensis, a new early Spathian (Early Triassic) coelacanth from North Dobrogea (Romania)

Authors :
Thomas, B. A.
Institute of Biological, Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, Ceredigion SY231NP, UK,,
Bek, J.
Laboratory of Palaeobiology and Palaeocology, Institute of Geology, Academy of Sciences v.v.i., Rozvojová 269, 165 00 Prague 6, Czech Republic,,
Hoşgör, I.
Viking International, Şehit Ersan Cad, 24-7, Çankaya-Ankara, Turkey,,
Štamberg, S.
Faculty of Arts, University Hradec Králové, Centre interdisciplinary research, Rokitanského 62, CZ 500 03 Hradec Králové, Czech Republic,,
Cavin, L.
Department of Geology and Palaeontology, Natural History Museum, CP 6434, 1211 Geneva 6, Switzerland,,
Grădinaru, E.
Department of Geology, Faculty of Geology and Geophysics, University of Bucharest, Blvd. Bălcescu Nicolae 1, RO-010041 Bucharest, Romania,,
Abstract : The Early Triassic witnessed the highest taxic diversity of coelacanths (or Actinistia), a clade with a single living genus today. This peak of diversity is accentuated here with the description of a new coelacanth discovered in the lower Spathian (Upper Olenekian, Lower Triassic) cropping out in the Tulcea Veche (Old Tulcea) promontory, in the city of Tulcea, in North Dobrogea, Romania. The bone remains were preserved in a block of limestone, which was chemically dissolved. The resulting 3D and matrix-free ossifications correspond mostly to elements of the skull and branchial apparatus. Posterior parietals, postparietal with associated prootic and basisphenoid allow a precise description of the neurocranium. Ossifications of the lower jaw, together with branchial and pectoral elements, complete the description of this coelacanth and support the coining of a new generic and specific name, Dobrogeria aegyssensis. A phylogenetic analysis of actinistians with the new species recovers clades which were found in most recent analyses, i.e. the Sasseniidae, the Laugiidae, the Coelacanthiformes, the Latimerioidei, the Mawsoniidae and the Latimeriidae, and identifies the new taxon as a non-latimerioid coelacanthiform.

Keywords : Latimeria, trias, mózgoczaszki, nowy takson, czaszka, Actinistia, Latimeriidae, Triassic, braincase, new taxon, skull,
Publishing house : Faculty of Geology of the University of Warsaw
Publication date : 2014
Number : Vol. 64, no. 2
Page : 161 – 187

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Qute : Thomas, B. A. ,Bek, J. ,Hoşgör, I. ,Štamberg, S. ,Cavin, L. ,Grădinaru, E. ,Grădinaru, E. , Dobrogeria aegyssensis, a new early Spathian (Early Triassic) coelacanth from North Dobrogea (Romania). Acta Geologica Polonica Vol. 64, no. 2/2014