Dr. Fűköh Levente szerk.: Malakológiai Tájékoztató 16. (Eger, 1997.)

DÁVID, Á.: Predation by Muricid Gastropods on Late-Oligocene (Egerian) Molluscs Collected from Wind Brickyard, Eger, Hungary

Cerithium egerense GÁBOR 1 1/0/0 Diastoma grateloupi turritoappenninica SACCO 5 6/0/0 m Drepanocheilus speciosus (SCHLOTHEIM) s.str. 1 1/0/0 Polinices josephinia olla (DE SERRES) 1 0/0/1 Globularia gibberosa sanctistephani (COS SM ANN et PEYROT) 2 2/0/0 Ampullina crassatina (LAMARCK) 2 2/0/0 Cassidaria depressa BUCH 1 1/0/0 Charonia tarbelliana transiens BÁLDI 1 0/0/1 Murex paucispinatus T.-ROTH 1 0/0/1 Hadriana egerensis (GÁBOR) 3 1/1/1 Babylonia eburnoides umbilicosiformis (T.-ROTH) 4 2/0/2 Galeodes basilica (BELLARDI) 1 1/0/0 Bullia hungarica (GÁBOR) 2 2/0/0 Athleta rarispina (LAMARCK) 9 7/0/2 Bonellitia evulsa (SOLANDER in BRANDER) 1 0/0/1 Turricula reguláris (KÖNINCK) 12 10/0/4 m Terebra simplex T.-ROTH 6 12/0/0 m Cylichna cylindracea raulini (COSSMANN et PEYROT) I 1/0/0 There are more successful borings than unsuccessful and unfinished. Occurrence of multiplied borings /m/ can be traced on a bivalve shell and on tests of five gastropod species. Drillholes of Muricids can be observed on the shells of seventeen epibenthonic and ten inbenthonic species. Distribution of the molluscs in the examined material is the following: scavengers are dominant among the species. While regarding the number of individuals suspensionfeeders are the firsts. There are no parasites in the collected material. Among the species bearing borings of Muricids the order is the following according to feeding habits: scavangers, suspensionfeeders, herbivores. 3. 4. "c" layer 710 specimens of 19 species have been examined. Their distribution according to molluscan classes is the following: Bivalves 9 species 570 species Gastropods 10 species 140 species Occurrences of Muricid borings have been observed on the shells of Ostrea cyathula LAMARCK and Theodoxus buekkensis (T.-ROTH). In the case of Ostrea cyathula 19 borings have been found on the shells of seventeen specimens. There are seven successful, two unsuccessful and eleven unfinished borings occures on the valves. There are two specimens bearing multiplied borings, (1/1/0; 2/0/0). Sign of successful prédation have been found on the test of Theodoxus buekkensis. Both