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.

Table 2. (continued) Species Char^\ acter \. P. (C) Polg atavus árdi P. (C. ) sp. Osztramos P.(C.

) crassidens holotype P. (C.) crassidens Beremend P. (C. ) townsendii X. America LPFL 0. 68(2; 0 0. 77 725) 0.72-0.81 (2; 0. 765) 0. 63 0.55-0.63 (5; 0. 594) LPFW 0. 65(2; 0 0. 72 685) 0. 68-0.72 (2; 0.700) 0. 68 0. 63-0.72 (5; 0. 652) LMOL 1. 36 1. 45-1.50 (2; 1.470) 1. 50 1. 36-1. 45 (2; 1.405) 1. 36-1. 50 (5; 1.462) LMOW 0. 95 0. 86-1.02 (2; 0.940) 1.0 0 0.86-0.90 (2; 0.880) 0.95-1.00 (5; 0.980) LMTL 1. 36 1. 36 1. 40 1. 36-1.36 (2; 1.360) 1. 36-1.45 (5; 1. 398) LMTW 0. 95 0. 88 1. 00 0.90-0.92 (2; 0.910) 0.90-0.95 (5; 0. 934) LTML 1. 33 1. 22 1. 13-1.27 (5; 1.208) LTMTR 0. 90 0. 77 0.77-0.81 (5; 0. 786) LT MTA 0. 88 0. 72 0.68-0.68 (5; 0. 680) HMUM 1. 45(3; 1 1. 68 556) 1. 50-1. 63 (3; 1.580) 1. 72 1. 54-1. 68 (2; 1. 603) 1. 36-1.50 (5; 1.432) H MB M 1. 31(2; 1 1. 50 405) 1. 45-1.59 (2; 1.520) 1. 54 1. 31-1. 45 (2; 1. 387) 1. 18-1. 40 (5; 1. 322) HCP 3. 34(2; 3 3. 56 450) 3. 10 3. 60 3. 22-3. 48 (2; 3. 350) 3. 22-3. 44 (4; 3. 330) There is a decrease in C-M/3 alveolar length and C-P/4 alveolar length from the Miocene and Pleistocene species to the recent animal, though the M/l-M/3 alveolar lengths considerably overlap in the three species (see Table 2). The basal length of P/2 of the study material greatly coincides in the Miocene and recent species, but it has greater values in P. crassidens

. The same is true for the basal width of P/2. The basal length of P/3 fully overlaps in all the study material. Its basal width, however, is the smallest - without overlap - in P. crassidens and is equal P. atavus and P. townsendii. P/4 basal length is clearly the greatest in P. atavus sp. n., intermediate in P. crassidens and smallest in P. townsendii. The widths of P/4s completely overlap in all the three species. Two roots are present in the ancestral species, incipient fusion of roots is sometimes detectable in P. crassidens, and the roots of P/4 are completely fused in P. townsendii. Here in the lower dentition also the antero-posterior chortening of the premolar row and that of P/4 are the most characteristic changes from the old ancestral forms to younger species. In many respects one can conclude from the above comparisons of features the primitiveness of P. atavus and the progressiveness of P. crassidens. Actually the species P. townsendii has retained numerous primitive features. The available material of lower molars of P. atavus is still far from sufficient for reasonable comparisons.