Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 10. 1981. (Budapest, 1981)

FRAGMENTA MINERALOGICA ET PALAEONTOLOGICA 10. 1931 p

. 59.54 New fossil Mouse-eared Bat, Myotis kretzoii sp. n., from the Middle Pleistocene of Hungary (Mammalia: Chiroptera) By GY. TOPÁL (Received November 30, 1980) Abstract: Description of Myotis kretzoii sp.n. from the Middle Pleistocene of Ördöglyuk Cave of Solymár is given. Among the very rich - unfortunately partly unidentified and still unpublished - fossil bat remains of Ördöglyuk Cave (Devil's Cave) of Solymár an interesting and common Mouse-eared Bat deserves special attention because of its characters and probable Importance in the stratigraphy of the Late Middle and Early Upper Pleistocene horizons. Derlvatlo nominis . The species is dedicated to Dr. Miklós KRETZOI, who conducted the first scientific study on the fossil bat fauna collected from the Ördöglyuk Cave of Solymár in the thirties. His study material was mainly destroyed during World War II and his manuscript remained incomplete and unpublished. Stratum typicum and locus typlcus. Solymár Horizon of the Middle Pleistocene, Ördöglyuk Cave of Solymár, near Budapest, Hungary. Diagnosis. A medium-sized Myotis related to M. nattererl Kuhl, with absolutely broader rostrum, absolutely longer molar-rows and relatively shortened premolar rows. Holotype. Fully preserved left mandible with slightly injured angular process and full dentition, except P2. Deposited in the Collection of the Palaeontological Department, Hungarian Natural History Museum, Budapest. No. V. 81.2. Measurements of the holotype: Length of mandible 12.3 mm, C-M3 length 7.1, C-P4 2.72, P4-M3 5.08, M

1-M

3 4.27, P

4 length 0.95, P4 width 0.77, Mj length 1.45, M

2 length 1.45, M

g length 1.33, M3 talonid width 0.81, height of mandibular body under Mi 1.68, height of mandibular body behind M3 1.72, height of coronoid process 3.56 mm. Other material and selected paratype. A good number of skulls, rostral fragments, mandibles and extremity bones not included in this study except some of their measurements and a selected skull with injured zygomatic arches, with P

4-M

3 teeth and missing auditory bones, also deposited in the Collection of the Palaeontological Department, Hungarian Natural History Museum, Budapest. No. V. 81.3. Its measurements are as follows: Total length 16.2 mm, condylobasal length 15.5, zygomatic width (partly estimated) 10.2, mastoid width 8.4, width of braincase 8.1, interorbital constriction 4.25, outer width of rostrum at M

3-M^ 7.3, inner distance between M

2-M

2 3.18, outer width at C-C (partly estimated) 4.5, C-M

3 6.6. C-P

4 2.86, P

4-M

3 4.72, M

1-M

3 3.99, M

1 length 1.63, M

2 length 1.68, M

3 length 0.86, M width 2.23, M

2 width 2.36, M

3 width 2.03, anteorbital bridge 0.81 mm. Measurements: (those of M. nattererl - including a curiously great-sized specimen in parentheses). Total length of skull 16.2-16.6 (14.6-16.85) mm,condylobasal length 15.25-15.5 (13.4-15.8), zygomatic width 10.2-10.35 (9.1-10.55), mastoid width 8.1-8.4 (7.5-8.25), width of braincase 7.85-8.1 (7.3-8.2), interorbltal constriction 3.9-4.25 (3.7-4.1), outer width of rostrum at M

3-M

3 6.9-7.4 (5.8-6.7), inner distance between M

2-M

2 3.00-3.22 (2.59-3.28), outher width at C-C 4.45-4.75 (3.4-4.3), C-M

3 6.2-6.9 (5.55-6.45), C-P

4 2.68-3.14 (2.54-2.95), P

4-M

3 4.72-5.1 (4.15-4.6), M

x-M

3 3.82-4.05 (3.30-3.75), upper C length 1.0 (0.88-1.00), upper C width