Myotis sp. (Kaup 1829) extant, ~6 cm long, is a typical microbat known from several dozen species. It retained an standard ungual only on the thumb. The rest were needle-like vestiges and the wing membrane extended to their tips. Half as long and derived from a sister to Icaronycteris and Rhinopoma, Myotis is a living specimen.
Distinct from Icaronycteris, the skull of Myotis is shorter, with a shorter rostrum and larger cranium. The canines are longer. Both upper and lower premolars 2 and 3 are smaller. Premolar 4 is larger. The three molars are flatter. The anterior dentary is further raised. The coronoid process is lower.
The cervicals and dorsals are shorter. The dorsal ribs are wider.
The humerus is shorter. The hand is larger. The ungual on digit 2 is a vestige.
A calcar is present and directed at the tail tip. |
