Diagnoza

Small passerine bird, approximately the size of the great tit Parus major; differs from all extant Passeriformes in the unique combination of characters covering coracoid with a rounded and not hooked processus acrocoracoideus and enlarged processus procoracoideus, very stout humerus with broad proximal epiphysis, carpometacarpus proportionally short with the distal end of the os metacarpale minus protruding only a little farther distally than the os metacarpale majus and phalanx proximalis digiti majoris is cleaver-shaped and widens considerably cranio-caudally towards its distal end.

Porównanie

Differs from the early Oligocene Wieslochia weissi in ulna with proximodistally long cotyla dorsalis; and carpometacarpus proportionally shorter; the early Oligocene Jamna szybiaki has a coracoid with enlarged processus procoracoideus, the early Oligocene Resoviaornis jamrozi differs in coracoid with a rounded and not hooked processus acrocoracoideus and enlarged processus procoracoideus; from members of the extinct family Zygodactylidae differs in clearly longer ulna (in relation to the humerus) and with elongated and tapered olecranon; from extinct and extant Coraciiformes differs in the presence of processus dentiformis (of carpometacarpus) and coracoid with elongated processus acrocoracoideus and somewhat enlarged but clearly smaller processus procoracoideus and carpometacarpus with processus intermetacarpalis reaching to the os metacarpale minus.

Autekologia

The humerus to ulna ratio it suggests the "passerine-type flight", with flapping phases and pauses; small size of carpometacarpus may have been compensated for by the long primaries .

Występowanie geograficzne

Only in the type locality.

Zasięg czasowy

Early Oligocene, Rupelian.

Materiały muzealne

Only the type specimen.

Literatura

Bocheński, Z.M., Tomek, T., Wertz, K., Happ, J., Bujoczek, M. and Świdnicka, E. 2018. Articulated avian remains from the early Oligocene of Poland adds to our understanding of Passerine evolution. Palaeontologia Electronica 21 (2): 21.2.32A.