Korkonterpeton, Werneburg & Štamberg & Steyer, 2020

Werneburg, Ralf, Štamberg, Stanislav & Steyer, Jean-Sébastien, 2020, A New Stereospondylomorph, Korkonterpeton Kalnense Gen. Et Sp. Nov., From The Lower Permian Of The Czech Krkonoše Piedmont Basin And A Redescription Of Intasuchus Silvicola From The Lower Permian Of Russia (Temnospondyli, Amphibia), Fossil Imprint 76 (2), pp. 217-242 : 220-221

Genus Korkonterpeton gen. nov.

T y p e s p e c i e s. Korkonterpeton kalnense sp. nov.

E t y m o l o g y. After the Celtic name Korkontoi (Κορκόντοι) for the Krkonoše Mountains, indicated by Ptolemais.

D i a g n o s i s. Unique characters among stereospondylomorphs:

(1) Vomerine fangs anteriorly to the choana.

(2) Widened anterior region of the pterygoid clearly

reaching the level of the posterior region of the choana.

(3) Exoccipital very elongated posteriorly.

Additional characters in contrast to a few stereospondylomorph genera, but shared with other ones:

(4) Elongated preorbital skull region measuring 2.4– 2.5 times the length of the skull table (shared with Archegosaurus ).

(5) Ventral premaxilla-maxilla-suture anteriorly to the choana (shared with Archegosaurus ).

(6) Premaxillary snout region relatively wide (aSw/ Sl> 0.33), box-like and blunt; with a moderately short premaxilla (shared with Glanochthon and Sclerocephalus ).

(7) Posterolateral margin of the skull curved medially, with the maximal skull width at the level of the anterior extremity of the quadratojugal (shared with Intasuchus ). (8) Small, sub-circular orbit (in large adults; shared with Cheliderpeton vranyi and Sclerocephalus ).

(9) Relatively small teeth, of similar size on the ectopterygoid + palatine and maxilla + premaxilla, no large teeth on the ectopterygoid (shared with Archegosaurus ).

R e m a r k. Although we only know one species of Korkonterpeton up to now, the diagnosis of the genus is proposed here based on the most significant differences when comparing this specimen with related genera. This diagnosis would be adapted by the possible discovery of other species.