Diagnoza

Moderately evolute conch with internal shell thickenings parallel to the aperture.

Porównanie

In the original description of the species the drawing of suture was reversed and this was probably the main basis to erect the genus Borkowia and compare it with Kiaclymenia. The morphologically closest species of Pachyclymenia seems to be P. intermedia Bogoslovsky, 1977  which differs in a somewhat more involute conch with oblique internal thickenings. In the distribution of thickenings, P. kozlowskii resembles the more involute and discoidal P. sinuconstricta Bogoslovsky, 1977 from the Clymenia-Gonioclymenia Zone of the southern Urals. It seems that P. kozlowskii is the least derived of all species of the genus. Its ancestry is apparently within Uraloclymenia from the late Prolobites-Platyclymenia Zone of the southern Urals, which has the umbonal saddle restricted to the umbilicus. In fact this is hardly a generic level distinction.

Autekologia

Występowanie geograficzne

Jabłonna.

Zasięg czasowy

Probably the earliest P. styriacus Zone. 

Materiały muzealne

Literatura

Dzik, J. 2006. The Famennian "Golden Age" of conodonts and ammonoids in the Polish part of the Variscan sea. Palaeontologia Polonica 63, 1-359.