Intasuchus KONZHUKOVA , 1956

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 : 232-235

Genus Intasuchus KONZHUKOVA, 1956

T y p e s p e c i e s. Intasuchus silvicola KONZHUKOVA, 1956

E m e n d e d d i a g n o s i s. Unique characters among

stereospondylomorphs: (2) Posterior part of the postfrontal extremely elongated and reaching a level clearly posterior to the pineal foramen.

Characters in contrast to distinct stereospondylomorph genera, but shared with others:

(4) Premaxillary region narrow (aSw/Sl = 0.31) and pointed, with a relatively elongated median portion (shared with Cheliderpeton ; Werneburg and Steyer 2002). (5) Maxilla slightly concave laterally (comparable with Glanochthon ; Schoch and Witzmann 2009b).

(6) Maximal width of the skull at the level of the pineal foramen and the anterior region of the quadratojugal (pSw = 0.80, similar in Korkonterpeton kalnense gen. et sp. nov.).

(7) ‘Otic notch’ (squamosal embayment) very deep and wide. The short suture between the squamosal and the supratemporal starts posteriorly at half the length of the supratemporal (similar in late adult Cheliderpeton ).

(10) Parachoanal vomerine tooth row on a higher elevation parallel to the medial choana (shared with Archegosaurus ). (11) Vomerine fangs very close to the anteromedian margin of the choana (shared with Glanochthon and Sclerocephalus ).

(12) Ectopterygoid with one or two large fangs (shared with Sclerocephalus and similar in size to Glanochthon ). (13) Anterior part of the pterygoid reaching a level posterior to the choana (shared with Glanochthon , Sclerocephalus and Archegosaurus ).

(14) Narrow basal plate of the parasphenoid (shared with Archegosaurus ).

(15) Basal plate of the parasphenoid with a central, ovoid and elevated patch covered by denticles (shared with Archegosaurus ).

R e m a r k. Although we only know the unique species

Intasuchus silvicola KONZHUKOVA, 1956 within Intasuchus

up to now, the new diagnosis of the genus proposed here is based on the most important differences when compared to related genera. This diagnosis will be adapted by the possible discovery of other species.