Diagnoza

Small passerine primarily characterized by the spina externa of the sternum that is rod-like and not bifurcated as in extant passerines; approximately the size of the dipper Cinclus cinclus or skylark Alauda arvensis;  differs from all extant Passeriformes in the sternum with short processus craniolateralis; coracoid with a rounded and not hooked processus acrocoracoideus; very stout humerus with elongated crista deltopectoralis that reaches about onethird of the total length of the bone; carpometacarpus with very stout os metacarpale majus, and phalanx proximalis digiti majoris that widens a little craniocaudally toward its distal end.

Porównanie

From the early Oligocene Wieslochia weissi differs in the sternum with the spina externa rod-like and not bifurcated and the carpometacarpus with broad distal end of the os metacarpale minus that protrudes far distally; from members of the family Zygodactylidae differs in having seven caudal vertebrae, the processus lateralis (of coracoid) is short and rounded, the sternum bearing only a single pair of the incisurae in its caudal part, the ulna bearing a prominent olecranon that projects far proximally and tapers

Autekologia

The straight, moderately long, thrush-like beak suggests a frugivorous or insectivorous diet; short and broad pelvis and sternum have made a stocky trunk suggests living on the forest floor; short and rounded tail is typical for strongly flying birds that live in shrubs and forests; long legs suggest that the bird spent much time on the ground, probably hopping or walking when foraging among trees like modern thrushes or wrens

Występowanie geograficzne

Only type locality

Zasięg czasowy

Early Oligocene, Rupelian

Materiały muzealne

Only the type specimen

Literatura

Bocheński Z.M., Tomek T., Bujoczek M., Wertz K. 2011. A new passerine bird from the early Oligocene of Poland. Journal of Ornithology 152(4): 1045–1053.

Mayr G. 2022. Paleogene fossil birds. Second edition. Heidelberg: Springer.