Szekessy Vilmos (szerk.): A Magyar Természettudományi Múzeum évkönyve 55. (Budapest 1963)

Topál, Gy.: The bats of a Lower Pleistocene site from Mt. Kövesvárad near Répáshuta, Hungary

146 gy. top

ai. The findings assigned by me to this taxon belong indubitably to the subgenus Selysius of the genus Myotis, their measurements agreeing with those of M. mystacinus. The root of the slender canine is laterally slightly flattened. The anterio-interior apex of P

4 is weakly developed. There is no protuncule on Al

2, the commissure connecting the bases of hypocone and metacone is evanescent. The foramen mentale of the mandible is large, situated very low. M

x and M

2 are slender. Their trigonids, as compared to the talonids, are strikingly narrow, with a strong exterior constriction between the talonid and the trigonid. The small numbers of the remains are insufficient for any further deductions and a more exact systematic allegation. We do not know, up to now, of any bat belonging to the size of M. mystacinus from the Lower Pleistocene of the Carpathian Basin. Myotis beehsteini robustus ssp.n. Six right maxillar fragments, with teeth C

—M

3, and rows P

4

—M

2 and M

1

—M

3, separate upper C 8 exemplars; P

4, M

1, M

2 3 ex.; M

3 3 ex.; left maxillar fragment 10 ex., with teeth I—M

3: rows C— M

2 I

2—-P- P

2—P

3 P

4—M

3 M

1

—M

2 M

1—M

3, separate upper C 3 ex.; P

4. M

2 2 ex. M

3 6 ex.; fragments of skulls and maxillae 6 ex., M

1 and M

2 fragments 4 ex. Right mandibles and mandibular fragments 13 exemplars with teeth C—P„ and P

4—M

3: C—P. P

4— M

3 M

x—M

a M

t—M

3 rows, lower C 5 ex., M„; left mandibles and mandibular fragments 11 exemplars, with C—M

3 teeth: C—Mj P

2—P

3 M

t—M

2 M

t—M

3 M

x—M, rows, lower C 3 ex., P

4. M, 2 ex., M

2 2 ex., M

3; different fragments of M

t M

2 M

3 7 ex. Proximal portion of right femur, left fragmentary cochlea 4 ex., broken manubrium sterni, clavicular fragments 6 ex. A total of 112 different, mainly skull and mandible, fragments, belonging to at least 13 specimens. The significant measurements taken from the findings, and compared with those of recent specimens, are given on a graph (fig.

17). H o 1 o t y p e : right mandible with injured C; then P

2 and M

x

—M

3, and alveoli of other teeth. Processes absent. Length of C

—M

3 7,8 mm, P

2

—M

3 6,9 mm, Mj

—M

3 4,5 nun, M

x 1,56 mm, M

2 1,60 mm, M

3 1,44 mm; in the Coll. Hungarian Natural History Museum, No. V 63/346. Horizon : Bihar fauna of Lower Pleistocene. Type locality: Répáshuta. Mts. Bükk, North Hungary. Myotis beehsteini and its nearly allied forms are everywhere frequent during the whole Ice Age, hence the great number of the remains in the Répáshuta locality is not striking. As against the recent comparative material available, the findings do not show morphological differences, being generally more robust, and of larger sizes. Of the 22 different measurements, there are 12, including those of the teeth, which show some deviations from the recent ones (cf. fig. 17). In the upper row of teeth, I found decided differences in M

1

—M

3 and also in the lengths of M

1

—M

2. Here the recent and fossil readings disagree, and the differences of the means are also well marked. Accordingly, there is but a slight agreement in the length (and even less in the width) of M

2. The longitudinal and latitudinal measurements of M

3 agree with those of the recent teeth. These data are wholly conforming in the two groups, though some of the recent teeth show minimum values. In the mandibular row. the length of C

—M

3 begins at the upper limit of the recent measurements. Within the row. there are considerable differences between the fossil and the recent ones concerning the length of P

2

—M

3, but that of Mj

—M

3 does not deviate as sharply. The inference is easily drawn that the anterior portion of the dentition of the fossil subspecies is more elongated. This might be caused, as discernible on the available P

2 P

3 teeth, by their