Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 11. 1983. (Budapest, 1983)

Description and comparisons

: Myotis janossyi sp. n. is related to M. brandti, as evidenced by its rather flattened skull with no pronounced sinus or curvature dorsally in lateral view. Its interorbital constriction is narrower than in the recent animal. This character along with a more pronounced shortening of the rostrum makes the supraorbital margins of the rostrum more diverging towards the lacrimalia in dorsal view. The anteorbital foramen is highly similar in both the recent and fossil species. The narial notch is slightly smaller in the fossil, or equal. Dorsal surface of rostrum is with evenly flattened depression on both sides, so the supraorbital portion is more intensively ridged than in brandti

. The median groove is shallower and shorter than in the recent form, and anteriorly at the narial notch there is an ill-defined knob that is missing in the recent species. The portion of palate projecting beyond the toothrows is narrower and not parallel-sided as in brandti

, but constricted at the base of alae, or slightly narrowing posteriorly. Anterior palatal emargination is similar, though relatively narrower than in the recent species. Canine stronger and with wider basal cross-section than in brandti

. P

3 has greater crown, so it is less reduced th^an in the recent species. P

3 cusp reaches well beyond the small anterointernal cusp of P , thus shows just the opposite picture as the one seen in brandti

. Parastylar lobe of P

4 less projecting anteriorly. The tooth itself is certainly shorter anteroposteriorly and smaller in cross-section than that of brandti

. M and M

3 with rounded-off lingual portion, due to the weak hypocone. The posteroprotocrista - premetaconule wing ridge is medium high, centrocrista weak but present, paraconuli are slight or medium. M

3 is even shorter than in the recent form. Its mandible is with medium high coronoid process, which is not with a strongly cut-off upper margin as in brandti

. Their dentition are very similar. The 1^ is with 4 cusps, the posteriormost being the smallest as in brandti

. The second incisor with 3 cusps. The posteriormost fourth one is just a slight knob in the outer row of cusps, practically absent in the recent species. I3 are equal in the two species. The position of all the incisors is the same in both animals. The fossil canine is somewhat stronger, both small premolars are greater in janossyi sp. n. P4 is more rectangular in the fossil, while anteriorly narrowing in brandti

, its buccal cingulum is less divided into two lobes in the fossil, however, its general picture is the same, sloping-down posteriorly in both. Paraconid - metaconid distance as compared to the metaconid - entoconid distance is relatively greater in all molars, especially in M

2 of the fossil species. Width of talonid related to trigonid of the fossil M

3 is greater than that of brandti

. A comparison with M. exilis shows as follows. Generally, both species have very similar measurements. _M_. exilis has somewhat greater condylobasal length. One of the best differences is the size of interorbital constriction. M. exilis certainly has smaller and janossyi sp. n. has greater values in this character. On the contrary, the new animal is with narrower palatal projection beyond the toothrows. The basicranium between the cochleae is decidedly wider, with more extended and elongated basial pits than those of exilis. Rostral width at M -M

3 crowns is slightly smaller in janossyi sp. n. One of the best distinguishing characters is the flatness of skull and braincase with almost no trace of sagittal crest in janossyi sp. n.

, compared to the inflated and rising, relatively narrower and higher braincase of exilis with strong sagittal crist. The braincase width/height ratio is 0.70 in janossyi instead of 0. 73-0. 76 in exilis

. The deep and relatively narrow anterior palatal emargination is well contrasted to the shallow and wide emargination of exilis

. While the M

3 width/length ratio seems to agree in both species, the width multiplied by length value shows about 1.0 or less in janossyi sp. n. and 1.1-1.3 exilis, so, the last upper molar is shorter and actually smaller than that of exilis

. M* an M^ have rounded lingual margin and this character is certainly different from that of the molars of exilis with very strong hypocone and angular inner margin. In the mandible the differences are slighter. Coronoid process in janossyi sp. n. is higher and less straightly cutoff. Incisors are definitely larger than in exilis where 1^ is three-cusped instead of being four-cusped as in janossyi sp. n. C is with elongated basal cross-section and not with a laterally widened circular one as in exilis

. All premolars are antero-posteriorly elongated as compared with those of exilis. The one-rooted premolars are greater and comparatively loosely set. P4 is elongated, just slightly narrowed anteriorly and with a forwardly projecting paraconid area, instead of a posteriorly strongly widened and lingually exceedingly convex tooth with an especially reduced and backwards withdrawn paraconid area. Anterior margin of Mj closes a smaller angle with the main axis of the tooth,