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

Table 2 Classification of molluscan data according to ecological and biogeographical groups. Legend: *=not used in quantitative analysis. Name group Ecological groups Biogeographical groups Cochlicopa lubricella Open Holarctic Truncatellina cylindrica Open South, Southeast Europe Truncatellina callicratis Transitional Mediterrane Granaria frumentum Open North Alpine Chondrina clienta Transitional East Alpine Pupilla triplicata Open East Alpine Vallonia costata Open Holarctic Vallonia pulchella Open Holarctic Acanthinula aculeata* Closed West Palearctic Zebrina detrita Open Transitional Punctum pygmaeum* Closed Holarctic Vitrina pellucida Transitional Holarctic Aegopinella minor* Closed Central Oxychilus inopinatus Open Transitional Euconulus fidvus Transitional Holarctic Coch lodina laminata * Closed Europe Laciniaria plicata Transitional Closed Helicella obvia Open South Euomphalia strigella Transitional Closed Cepaea vindobonensis* Transitional South Helix pomatia Transitional South The results from statistical procedures (Fig. 1.) show the separation of open (Areas 1, 2, 6) and mosaic-like transitional areas (Areas 3, 4). Indirectly, the diversity of the flora and the fauna (species number (14 species) and evenness (Fig. 3.) here are the highest) may cause the segregation of Area 5. Most species belongs to the open group (Table 2). Granaria frumentum (Draparnaud, 1801) and Truncatellina cylindrica (Férussac, 1807) prefer the extremely dry and sparse Area 2, Helicella obvia (Menke, 1828) and Vallonia pulchella (O.F. Müller, 1774) prefer grasslands like Area 1 and 6. Vallonia costata (O.F. Müller, 1774), Pupilla triplicata (Studer, 1820) and Cochlicopa lubricella (Porro, 1838) are the characteristic species of the E rocky grassland and the shrub-grassland mosaic on the E ridge. Only fossil or subfossil individuals of Chondrula tridens (O.F. Müller, 1774) were found from loess, despite previous works (Gebhardt, 1958, Kovács, Gy.-Richnovszky, A. 1989) mentioned the xerophilous species from Szársomlyó. Two species belong to the open-transitional group. The relative frequency of Zebrina detrita