Vogelgnathus unicus (Klapper et all., 2004) in co-occurrence with K. rhomboidea from Kowala and Łagów in the Holy Cross Mountains.

Apparatus composition of Vogelgnathus unicus

Diagnoza

Short denticles of P₁ elements, merging together into a blade with undulated margin in adult specimens; M elements with short processes of subequal length.

Porównanie

The type series of P₁ elements of Mehlina? unica Klapper et al., 2004 is characteristic enough in the pattern of denticulation to make identification of this species rather safe, even if the rest of its apparatus was not identified by Klapper et al.. The similarity of P₁ elements to geologically older Mehlina robustidentata sp. n. may be accidental but a possibility cannot be excluded that V. unicus and V. variabilis independently paedomorphically developed from closely related species classified here in Mehlina. If truly this was the case, as suggested by the sympatric occurrence of these species of Vogelgnathus, the range of the genus should be enlarged to preserve its monophyly.

Autekologia

Występowanie geograficzne

Jabłonna;
Łagów, Miedzianka, and Kowala.

Zasięg czasowy

The K. crepida Zone;
the C. quadrantinodosa to P. trachytera Zones. 

Materiały muzealne

ZPAL: 1,801 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.