Their fossil bones have been recovered from the Late Cretaceous (Maastrichtian, c. 70.6 – 66 mya) Lecho Formation at estancia El Brete, Argentina.

The presently only known fossil bones (PVL-4021-1) are mostly of the left tibiotarsus (lower leg) and tarsometatarsus (upper foot) of a single individual.

This structure serves to attach and arrest the posterior cruciate ligament, which in turn prevents the lower and upper leg from shifting out of position during walking.

It was a rather advanced species of enantiornithine and possibly quite closely related to Enantiornis and Avisaurus, but more likely closer to other Euenantiornithes (Sanz et al. 1995).

Its habitat was a richly vegetated coastal area that was dotted by – possibly brackish – lakes or small rivers (Chiappe 1993), and it might thus be that the present species represents a case of parallel evolution with waders and similar semi-aquatic forms, or even a running bird similar to an oversized courser, and quite unlike anything living today.