Strombus

1-6

Authors: Fontoura-da-Silva, V.; Carneiro, J.B.; Caetano, C.H.S.

In this investigation, we present data on composition, frequency of occurrence, volume and weight of the epibiotic community on the snail Tegula viridula (Gmelin, 1791) from Flexeiras beach, Itacuruçá Island, Rio de Janeiro, Brazil. Epibionts found were algae, bryozoans, barnacles, polyplacophorans, polichaete worm tubes, and oysters. Epibionts were found on 82.17% of T. viridula individuals examined, barnacles being the most frequent (64%), followed by polychaetes, algae and oysters. The months of June (2010) and January (2011) had the highest percentages of epibioses recorded: 95.35% and 93.68%, respectively. The percentage of epibionts was positively correlated to the length of the shell. Types of epibionts changed according to length variation of shells. Epibionts also significantly increased the weight and volume of shells.

10-12

Authors: Dornellas, A.P.S. & Simone, L.R.L.

Five prodissoconchs of Lamellibranchia bivalves was found in stomach contents of Calliostoma coppingeri. This is the first findings of bivalves in the stomach of a Calliostoma species. In a consensus, the feeding behavior of Calliostoma was predominantly herbivorous or detritivorous. However, several papers have reported many species as carnivorous, which is discussed. The presence of innermost marginal teeth in the Calliostomatinae radulae seems to be associated with carnivory.