The structure of the egg ribbons of a planktonic and intracapsular developing siphonariid limpet (Gastropoda: Pulmonata)

摘要: Summary Egg ribbons of two sympatric species siphonariid limpets (Siphonaria capensis and Siphonaria serrata) with different life-history strategies were studied to compare their structural biochemical differences. The structure the egg was examined by light, transmission scanning electron microscopy. organic content determined TCA soluble carbohydrate, NaOH protein total lipid estimation. In both histochemical tests showed presence mucopolysaccharides in ribbon jelly, perivitelline fluid developing embryo, whereas present only embryo. consist (proceeding inwards) an outer mucous cover, a matrix which holds capsules, inner layer terminating strand, capsules envelope surrounding fluid. composition e...