Conditolepis lobicornis (Schülke, 1995) from the late K. triangularis Zone atJabłonna and Wietrznia in Holy Cross Mountains - P₁, P₂, S₁, S_3-4  and M elements.

Diagnoza

Smooth P₁ element with a narrow extension of the posterior lobe and gently bent P₂ element with incipient platform and denticles of almost uniform height and size.

Porównanie

Conditolepis lobicornis is the first member of the branch of palmatolepidids with reduced additional processes in S₀ elements, indicating also its proximity to K. linguiloba sp. n. representing a continuation of its lineage. Klapperilepis subperlobata (Branson et Mehl, 1934 sensu Schülke 1999) is ancestral to C. lobicornis. Its relationship to, and possible identity with, K. triangularis remains to be clarified.

The shape of the platform of P₁ elements is very variable in each of the studied samples, with end-members of transition series approaching Palmatolepis initialis Dzik, 2006. , C. tenuipunctata , and C. linguiloba Dzik, 2006. This apparent similarity is the result of a phylogenetic proximity to all these species, in the first case the shared features of the apparatus morphology are plesiomorphic, in two others these could be considered apomorphic for the genus. There is a clear morphologic gap between the ranges of the platform shape variability of the type populations of C. lobicornis, C. linguiloba sp. n., and C. tenuipunctata.

Autekologia

Występowanie geograficzne

Płucki, Wietrznia, and Jabłonna.

Zasięg czasowy

K. triangularis Zone. 

Materiały muzealne

ZPAL: 403 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.