O. Gy. Dely szerk.: Vertebrata Hungarica 23. (Budapest, 1989)

Topál, Gy.: Tertiary and Early Quaternary remains of Corynorhinus and Plecotus from Hungary (Mammalia, Chiroptera) 33-55. o.

as well as most of P. auritus (except some small specimens). Width of intermaxillary notch of the rostrum exceeds that of recent P. auritus including ones from Asia, but equals that of P. austriacus. The depth of intermaxillary notch is shorter than even that of the smallest value of P. auritus, thus, the whole study material of recent specimens. The width of the anterior palatal emargination agrees well with that of P. austriacus, being greater than that of any auritus. Its depth, however, coincides with that of the smallest P. auritus. The length of the lacrimal crista is equal in P. pliocaenicus and in P. austriacus, however, its surface is not so sharp as in P. austriacus

. Amongst the upper tooth-row and tooth measurements, the only available C-M3/ length in P. pliocaenicus falls between the ranges of P. auritus and P. austriacus, but equals that of the Mongolian P. auritus (see Tables 3, 4). P4/-M3/ length, P4/-M3/ alveolar length and M1/-M3/ length partly agree with those of (probably male) P. austriacus, being greater, without overlap, than that of any P. auritus studied. C-P4/ lengths coincide with those of P. austriacus, do not overlap with the European P. au ritus, but do so with the Korean and Mongolian specimens. Upper C basal length without overlap falls between the recent P. auritus and P. austriacus

, somewhat closer to the latter. The upper C basal width is equal to the smaller values of P. austriacus. The basal width of P2/ of the two available specimens is appreciably greater than that of any P. auritus and there is marginal overlap but with the maximum value of P. austriacus, the other specimen being greater than those in the P. austriacus studied. Basal lengths of P4/ of the seven studied specimens partly exceed the maximum values in P. austriacus, but the range includes the values of the Korean and Mongolian specimens of P. auritus. The width of P4/ is intermediate between that of P. auritus and P. austriacus, but to some extent the range overlaps both. This is also true for Ml/ length, Ml/ width and M2/ width. M2/ length, however, fits well into the range of P. austriacus and is thus greater than that of P. auritus. As concerning the lower dentition, the only measurement of C-M/3 alveolar length of Plecotus pliocaenicus agrees with the smallest specimen of P. austriacus and practically with that of the Korean P. auritus. P/4-M/3 length, C-P/4 length, M/l-M/3 length and M/l-M/3 alveolar length of P. pliocaenicus all fall into the range of the same measurement in P. austriacus, thus it is greater than in P. auritus and even in the Asiatic P. auritus (see Tables 5, 6). The lower C basal length agrees with that of P. austriacus and evidently with that of the Asiatic P. auritus. The basal length of P/2 equals that of P. austria cus and P. 'auritus from Mongolia. The basal width of P/2 overlaps but with the maximum value of P. austriacus and it is even greater. A very similar case is with P/3 basal width. So these small premolars are as bulky as those of P. austriacus

, thus greater than in P. au- ritus. Moreover, these fossil teeth are antero-posteriorly somewhat longer than in the evidently more advanced P. austriacus (see Plate II, Figs 7, 8, 9). This is especially true for P/3 basal length, also in Asiatic specimens of P. auritus. P/2 has a well-developed anterointernal cingulum-cusp both in P. pliocaenicus and in P. austriacus. Such a cusp is missing in P. auritus. There is no actual difference in the dimensions of P/4, however, the basal cross-sectional outline is angular in P. pliocaenicus and antero-posteriorly more elongated than in P. austriacus and its outer anterior margin is not obliquely cut as in P. auritus. The M/l length and the width of P. pliocaenicus equal those of P. austria cus and Korean and Mongolian P. auritus. M/2 lengths equal to and its width exceeds, however, (one case for each) the maximum values of P. austriacus. The trigonid width of M/3 of P. pliocaenicus seems to be greatest in the present study material. Finally, the heigth of the coronoid process of the new animal exceeds those of the European and Korean P. auritus, though it is lower than that of P. austriacus and Mongolian P. auritus. A comparison of P. pliocaenicus on the one hand and P. abeli and P. cf. abeli on the other is as follows: value of depth of intermaxillary notch of P. pliocaenicus being smaller than in any recent specimens falls into the observed range of P. abeli from PLATE I; Figs 1-8 dorsal, occlusal and lateral views of rostra and maxillae of Plecotus (Corynorhinus) species. Figs 1-3 rostrum of No. 58. 74. 1. P. (C. ) townsendii pallescens: 1= dorsal view, 2= occlusal view, 3= left lateral view. Figs 4-6 No. V. 86. 19 rostrum of P. (C. ) crassidens: 4= dorsal view, 5= occlusal view, 6= left lateral view. Figs 7-8 No. V. 15228 (VT. 138) maxilla, holotype of P. C.) atavus

: 7= occlusal view, 8= right lateral view