Latericriodus (or Antognathus) rarus sp. n.; left P₁ (holotype) and P₂ elements from the L. styriacus Zone at Ostrówka (sample Ost-5); specimens ZPAL cXVI /1797-1798.

Diagnoza

Icrion of P₁ element with additional denticle lateral to the cusp.

Porównanie

The specimens from Ostrówka and Kowala may represent the first stage in development of an additional process characterizing species of Antognathus (see Sandberg and Dreesen 1984). Taking the P₁ element alone, it seems likely that the process developed de novo and is not homologous with the differently oriented process in Latericriodus sp. However, the association of a surprisingly primitive, denticulated P₂ element of seemingly Early Devonian morphology suggests that this is rather a kind of late Devonian ‘living fossil’. 

Autekologia

Występowanie geograficzne

The late L. styriacus Zone at Kowala and Ostrówka.

Zasięg czasowy

Materiały muzealne

4 specimens ZPAL

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.