caa a22 4500 388110325 CHVBK 20180307125351.0 cr unu---uuuuu 161130s1999 xx s 000 0 eng 10.1017/S0263593300002649 doi S0263593300002649 pii (NATIONALLICENCE)cambridge-10.1017/S0263593300002649 The postcranial skeleton of Discosauriscus Kuhn, a seymouriamorph tetrapod from the Lower Permian of the Boskovice Furrow (Czech Republic) [Elektronische Daten] The description of the postcranial skeleton of larval, metamorphic and early juvenile specimens of the genus Discosauriscus is based on three-dimensional material and includes a description of the ontogeny of the swollen neural arches and the central elements of the vertebrae. Discosauriscus has 24 (or 23) presacral vertebrae. The morphology of the atlas-axis complex is similar to that in Seymouria sanjuanensis. The neural arches start to swell slightly in specimens of late larval stage; they are completely swollen immediately after metamorphosis. There are about 40 caudal vertebrae and one sacral vertebra. The atlantal pleurocentrum is paired in metamorphic individuals. In postmetamorphic individuals, the pleurocentra 2-5 are not completely closed dorsally; the pleurocentra 6-30 form complete discs. The first haemal arch is situated on the sixth caudal vertebra. The atlantal rib is present. There are six caudal ribs. Discosauriscus has an anocleithrum which is the first record of this dermal pectoral element within seymouriamorphs and Lower Permian tetrapods. The scapula and the coracoid are separate elements. The phalangeal formula of the manus is 2, 3, 4, 5, 3. The iliac blade has a massive, almost horizontally oriented posterior process; the anterior process is absent. The phalangeal formula of the pes is 2, 3, 4, 5, 3. Rounded ventral scales are present. The comparison and evaluation of the available postcranial elements of Discosauriscus, Utegenia, Ariekanerpeton and Seymouria support the view that Discosauriscus and Ariekanerpeton, forming the family Discosauriscidae, are immediately related genera. Copyright © Royal Society of Edinburgh 1999 anatomy nationallicence ontogeny nationallicence relationships nationallicence Seymouriamorpha nationallicence Klembara Jozef Faculty of Natural Sciences, Comenius University, Department of Ecology, Mlynska dolina, SK-842 15 Bratislava, Slovak Republic Bartík Ivan Faculty of Natural Sciences, Comenius University, Department of Zoology, Mlynska dolina, SK-842 15 Bratislava, Slovak Republic Transactions of the Royal Society of Edinburgh: Earth Sciences Royal Society of Edinburgh Scotland Foundation 90/4(1999), 287-316 0263-5933 90:4<287 1999 90 TRE https://doi.org/10.1017/S0263593300002649 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0263593300002649 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Klembara Jozef Faculty of Natural Sciences, Comenius University, Department of Ecology, Mlynska dolina, SK-842 15 Bratislava, Slovak Republic NATIONALLICENCE 700 1- Bartík Ivan Faculty of Natural Sciences, Comenius University, Department of Zoology, Mlynska dolina, SK-842 15 Bratislava, Slovak Republic NATIONALLICENCE 773 0- Transactions of the Royal Society of Edinburgh: Earth Sciences Royal Society of Edinburgh Scotland Foundation 90/4(1999), 287-316 0263-5933 90:4<287 1999 90 TRE CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge