Apparatus composition of Urbanekodina undata

Diagnoza

Minute elements with truncated processes.

Porównanie

S elements of the apparatus of this species are superficially similar to juvenile homologous elements of the apparatus of the palmatolepidid Conditolepis, with which they co-occur. They differ in inverse angular appearance, the external process being ‘truncated’ in such a way that the first denticles are the largest in the row. The almost complete reduction of the medial process in S₀ elements is probably a paedomorphic feature. The origin of this bizarre conodont from Vogelgnathus seems likely but not proven. The alternative palmatolepidid relationship would require even deeper transformations.

Autekologia

Występowanie geograficzne

Kowala;
rare in all localities except for Miedzianka

Zasięg czasowy

Possibly in the late K. triangularis Zone;
ranging from the C. quadrantinodosa to L. styriacus Zone.

Materiały muzealne

ZPAL: 206 specimens.

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.