Folia Historico-Naturalia Musei Matraensis - A Mátra Múzeum Természetrajzi Közleményei 12. (1987)

Czájlik, P.: A Talpa romana ehiki n. subsp. leírása, koponya méreteinek biometriai elemzése

2.10. Multiple analyses 2.11. Searching for the most distinctive characteristic among the measurements used (i. e. wich has the highest coefficient, which gives the biggest distance between Talpa romána ehiki and Talpa europaea /Hungary/), a 4-variable analysis was carried out. In this way previous distinctive characteristics were also checked. Variables used: bj = skull width, b, = rostral width, b, = maximal diameter of maxillar M, , b

A = longest distance Between the two maxillar M, (rostral width after STEIN), у = CB (length of skull base). '* The equations obtained Talpa romána ehiki n. subsp.: Та у = -5,07a + 2,001b, - 0,45b

2 - 2,66b, + 2,19Ь

Д Ipa europaea (Hungary): У = -9,17a + 0,51Ь

Х + 0,097b

2 + 2,978b

3 + 2,79b

( The biggest differences obtained are b

r-, - b_-j • 5,638 (maximal diameter of maxillar M

1 (and b

r

, - b

eJ = 1,491 (skull"width;'. The coefficients are real, since the results of regression analysis are as follows: Talpa romána ehiki

: г = 0,931, г

2 = 0,866, F = 11,40, Talpa europaea (Hungary): г = 0,868, г* = 0,754, F = 5,369. In both cases the correlation is significant at level of 0 0,1% (n = 12-12). 2.12. To check these results a 5-variable analysis was carried out, where a

Q was eliminated. The variebles used were: b. = rostrlal width, b

2 = maximal diameter of maxiller M,, b, = mesostyle of maxillar M, (if bifid +1, if not -1), Ьд = distance between the two maxillar M,, be • skull width. The equations obtained were as follows: Talpa romána ehiki n. subsp.: у = -0,45b. - 2,67b

2 - 5,07b, + 2,19Ь

Д + 2,001b

5 Talpa europaea (Hungary): у = 0,096b, + 2,97b

2 + 9,17b, + 2,79b. + 0,509bc. The order of differences has not changed. However the. absolute difference in the mesostyle of maxillar M, (bifid or not) b , - b , = 14,77 serves as reference to judge the differences in other measuremenîs

. 0n

r

this basis I propose to regard the maximal diameter of maxillar M. (b . - b . * 5,64) as distinctive characteristic at the species level whereas skull §idth, rotsral width, together with the distance between the two maxillar M. used formely, as only so-called subspecies characteristics (b - b

r5 = 1,492; b

el - b

rl = 0,456; b

e4 - b

r4 = 0,6). 2.20. Regression of M

x on CB 2.21. As the third step, maximal diameter of maxillar M. was plotted against CB in Talpa romána terra typica, Talpa romána (S-Italy), Talpa romána stankovici

, Talpa romána ehiki and Talpa europaea (Hungary) (Fig. 4). In Figure 5 the same is shown for the Hungarian, Macedonian an Italian populations of Talpa europaea

. In thisway the relation of the populations mentioned could be studied on the basis of important distinctive characteristic. A relation between the geographical location (altitude and 1 latitude) of the respective populations and the centroids of their M. (CB sets can be recognized in the diagram of Talpa romána (Fig. 4). Concerning the distribution of the four Talpa romána populations the following can be stated: - the more southern the location, the bigger the diameter of maxillar M,. - the higher the altitude of the location, the smaller the body size (CB). As an illustration of this the average elevation of the locations and the mean body size (CB) of the four Talpa romána populations are presented: Talpa romána (Macedonia) 1,125 m 32,29 mm Talpa romána (S-Italy) 850 m 34,35 mm Talpa romána terra typica 100 m 36,13 mm Talpa romána ehiki 88 m 36,55 mm 2 The two sets of numbers are highly correlated: г = -0,97, г = 0,94, t, (P = 0,1 % in table) * 31,6 t = 31,82. This means, that there is a strong (the level of significance is 0,1 %) negative correlation between the elevation of the habitat and body size (CB) in Talpa romána

. The distribution of individual specimens of each of the four populations in the diagram suggests, that these populations are genetically isolated. On the other hand tíhe individuals of the three Talpa europ

aea populations are distribu144