Dr. Fűköh Levente szerk.: Malakológiai Tájékoztató 15. (Eger, 1986.)

P. SÓLYMOS.: Ecological and biogeographical investigation of the recent mollusc fauna of Szársomlyó (S Hungary), southern side

NuCoSA 1.0* r 3 23 22 4 21 5 ID L2 14 15 16 2 11 13 17 18 19 2D 24 Fig. 1. Result of the multivariate statistical procedures (Matusita quantitative distances, Ward-Orlóci fusion method (MISSQ) and hierarchical cluster analysis). Legend: foot numbers mean the number of the soil samples (1-4: Area 1, 5-8: Area 2, 9-12: Area 3, 13-16: Area 4, 17-20: Area 5, 21-24: Area 6). (O.F. Müller, 1774) is evenly high as against the frequency of Oxychilus inopinatus (Ulin, 1887), which is evenly low on each areas. Vitrina pellucida (O.F. Müller, 1774) and Euconulus fulvus (O.F. Müller, 1774) are the most characteristic species of the transitional group. These species were taken only from the shrub areas. Euconulus fulvus is concentrated in the dense shrub on the ridge. Chondrina clienta (Westerlund, 1883) prefers rocky areas. Other species of the transitional group are Truncatellina callicratis (Scacchi, 1833), Helix pomatia Linnaeus, 1758 and Cepaea vindobonensis (Férussac, 1821). Only one specimen of Cepaea vindobonensis was found on the E end of the mount in grassland (not in samples), but this species is very common in the degraded vegetation around the hill. Laciniaria plicata (Draparnaud, 1801) and Euomphalia strigella (Draparnaud, 1801) belong to the transitional-closed group. Laciniaria plicata is dense in the wet shrub. Just a few individuals of Euomphalia strigella was found in the wet srub on the ridge, but numerous individuals of both species were taken from the two caves on the ridge. Acanthinula aculeata (O.F. Müller, 1774), Punctum pygmaeum (Draparnaud, 1801), Cochlodina laminata (Montagu, 1803) and Aegopinella minor (Stabile, 1864) belonging to the closed group were found only in these cool and wet caves. These four species were not dense in the samples taken from the caves, but in the closed forest of the N hillside these species could be denser. Truncatellina callicratis and Laciniaria plicata were dominating and Cochlicopa lubricella, Chondrina clienta, Euconulus fulvus and Cepaea vindobonensis were not found in these soil samples. Zoogeographical analyses The rate of biogeographical groups (Table 2) were examined according to the number of species and the relative frequency. The base fauna of the study area is mostly composed of Holarctic and S, SE Europe species. In the view of relative frequency N Alpine, Central Europe and S, SE Europe groups are dominating (Fig. 2.).