Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 11. 1983. (Budapest, 1983)
FRAGMENTA MINERALOGICA et PALAEONTOLOGICA 11- 1983 p. 43.54 New and rare fossil Mouse-eared Bats from the Middle Pliocene of Hungary (Mammalia, Chiroptera) By Gy. TOPÁL (Received December 1, 1982) Abstract: Results of factor analysis on rostra and upper dentition of small Myotis from the Middle Pliocene of Osztramos Localities 9 and 13 are discussed. Descriptions of Myotis janossy sp. n. , M. paradaubentoni sp. n. , M. estramosensis sp. n. are given and the first earliest European record of fossil M. blythi is reported. Discoveries of Osztramos Localities 9 and 13 were first reported and from these, among others, some interesting new taxa of insectivores and rodents were described by JANOSSY (1 973, 1974), along with a stratigraphical evaluation. JANOSSY placed their faunas between the typical Upper and Lower Pliocene faunas of Europe. These localities yielded numerous remains of bats of a typical hibernating assemblage of cave-dwelling species. The only difference observed was that the much less numerous material from Locality 13 contained no other bats than Myotis , while in Locality 9 besides hundreds of Myotis remains there were found species of Rhinolophus , Plecotus and Miniopterus too. In my previous papers (TOPÁL 1974, 1975, 1979, in press) I dealt with the rhinolophids and the comparison of mandibles of the abundant mouse-eared bats with the corresponding faunas from Germany and Poland. As fortunately some quite well preserved skulls and rostra from the small-sized Myotis are also available in the material, their description - along with those of new taxa - has become an urgent task. The only previously known Myotis species of this size-category were Myotis helleri Kowalski, 1962 (= M. insignis Heller, 1936) and M. exilis Heller, 1936 [=M. cf. exilis (KOWALSKI 1956)] . MATERIAL AND METHODS Out of several hundreds of fragments 61 rostra - including a few skulls - from Osztramos Localities 9 and 13 were used for computation in this study. Strengths of the small antero-internal cusp of P^ and paraconuli of molars were assessed by scoring on a scale of 1 to 7. The following measurements were taken by caliper and eye-piece micrometer to 0. 01 accuracy: interorbital constriction, lacrimal width, rostral width at C-C (crowns), rostral width at C-C (alveoli), rostral width at M 3-M 3 (crowns), rostral width at M 3-M 3 (alveoli), length of narial notch, width of narial notch, length of anterior palatal emargination, width of anterior palatal emargination, shortest distance between C alveolus and anterior palatal emargination, distance between M^ postero-lingual margin and posterior margin of maxillary bone, length of anteorbital bridge, height of maxillary bone
