[4] All other species belonging to Palaeochiropterygidae are known only from isolated teeth and jaw fragments from Europe, India, Turkey, and possibly North America.

[5][6][7] At Messel, the two species of Palaeochiropteryx are hypothesized to have occupied similar niches to living hipposiderids and rhinolophids that forage close to the ground and among vegetation.

[8] The widespread distribution of Palaeochiropterygidae among the northern continents in the early and middle Eocene conflicts with the known morphology of P. tupaiodon and P. spiegeli, however, suggesting that other species of palaeochiropterygids had body plans much more suitable to long distance dispersal.

[5] Stehlinia has been previously considered to be a member of the superfamily Vespertilionoidea, possibly aligned with Natalidae or Kerivoulidae,[7][11] but is now more commonly recognized as a palaeochiropterygid.

Stehlinia, along with Lapichiropteryx and Anatolianycteris, possesses a very simple lower fourth premolar compared to other palaeochiropterygids and a close relationship between those three species has been proposed.