Tripodellus donoghuei Dzik, 2006 from the early L. styriacus Zone at Ostrówka and the P. trachytera Zone at Jabłonna in the Holy Cross Mountains - P_1,  P₂, S_3-4, and M elements.

Diagnoza

Twisted P₁ element with wide, lanceolate platform and minute larval basal cone (pit).

Porównanie

The apparatus of this species was already restored as Palmatolepis aff. Pal. gracilis. Specimens of similar morphology occur in samples with T. minutus but there is no gap in variability separating them from the modal morphology of that species. Such a gap can be identified only in samples with T. schleizius and T. lobus as associated species, although rarely juvenile specimens of T. schleizius of comparable size are associated with T. donoghuei in its early populations. The oldest sample with juveniles of T. schleizius showing a virtually straight blade have been found in Kadzielnia in sample Ka-7, where T. donoghuei is missing.

In the outline of the platform T. donoghuei resembles members of the T. gonioclymeniae lineage but it lacks the stage of ‘sinuosa’ larva with strongly asymmetric basal cone in P₁ elements. It seems to be a successor of T. minutus, which originated allopatrically in respect to T. schleizius.

Autekologia

Występowanie geograficzne

Kadzielnia, Jabłonna, Kowala, and Ostrówka.

Zasięg czasowy

Late K. crepida (with C. klapperi) to L. styriacus Zones. 

Materiały muzealne

ZPAL: 391 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.