Dr. Nagy I. Zoltán szerk.: Fragmenta Mineralogica Et Palaentologica 6. 1975. (Budapest, 1975)

Fragra. Min. et Pal. 6. 1975. A new Fossil Horseshoe Bat (Rhinolophus variabilis n. sp.J from the Pliocene Sediments of the Osztramos Hill, NE Hungary (Mammalia: Chiroptera) György TOPÁL Hungarian Natural History Museum, Budapest ABSTRACT: A description of Rhinolophus variabilis n.s

p. from the Pliocene of Osztramos Hill, NE Hungary is given. The localities No. 1 and No. 9 of Osztramos Hill rendered fossil faunas of great importance from the Middle Pliocence of Europe

. The mammalian remains other than bats were studied and published by JÄNOSSY (1971, 1974) and some of the bats investigated by TOPÁL (1974). The sediments of these Pliocene localities contained numerous remains of a small horseshoe bat. This fossil species was similar in size to Rh. hippo- sideros, however, with certain different characters, and it showed primitive features. Because of its importance, it merits description before the full treatment of the whole bat faunas

. Derivatio nominis

. The name refers to the extensive variability of the dental characters observed. Stratum typicum and locus typicus

. Middle Pliocene (Estramontian), locality No. 9 of Osztramos Hill at Tornaszentandrás, NE Hungary. 4 Diagnosis

. Size of Rhinolophus hipposideros, or somewhat greater, with longer C-P and C-P4 rows in the total toothrow lengths, and with other ancestral dental characters. Holotype

. Left mandible (Inventary No. V. 75-95, deposited in the collection of the Palaeontological Department of the Hungarian Natural History Museum) with missing ascending ramus and with full dentition except el and P , and with a badly injured M (Plate m. fig. 1.) Other material. All are in the Palaeontological Department of the Hungarian Natural History Museum. From loc. No. 1 F: left upper M

1 (Inventary No. V.75. 93), left mandibular fragment with M-^-Mß, right mandibular ramus with P2-M3, right mandible with I

2-M

2

, right mandibular fragment with M

2 (Inventary Nos. V.75.

89, V.

75.90, V.75. 91) . Loc.No. 1 C: Right upper C (Inventary No. V.75.

87). Loc. No. 1 E: Right upper C (with abnormally doubled tip), left M

3

, right maxillary fragment without teeth (Inventary No. V.75.

88). Loc. No. IF: 2 distal portions of right humeri (Inventary No. V.75. 92) . Total number of pieces from locality No. 1 = 11. From locality No. 9: Skull and upper dentition. Full rostrum with P

4-M

3

, 2 rostral fragments; nasal swelling, etc. (Inventary No

. V.75.

110. and V. 75.109). Praemaxillae. 4 right ones, lieft side one;