Abstract

VERGARA, DANIELA  and  VELASQUEZ, LUZ ELENA. Larval stages of digenea from Melanoides tuberculata (Gastropoda: Thiaridae) in Medellín, Colombia. Acta biol.Colomb. [online]. 2009, vol.14, n.1, pp.135-142. ISSN 0120-548X.

The larvae of two trematodes found in the freshwater mollusk Melanoides tuberculata (Gastropoda: Thiaridae) are described. 125 snails from the Medellin’s Botanical Garden Joaquín Antonio Uribe were collected. In the laboratory, each individual was placed alone and stimulated with light in order to have cercaria emission. 9.6% of the snails released cercariae. These were separated in three morphologies. From each one, 15 individuals were measured and drawn. Photographs were taken. Based on their morphological characteritics the presence of Centrocestus formosanus (Heterophyidae) was determined. The other two morphologies were classified in the family Philophthalmidae. One of them constitutes the first register for Colombia. The sensibility of M. tuberculata to infections by digeneans, and the specificity of the family Philophthalmidae to mollusk hosts of the superfamily Cerithioidea are confirmed

Keywords : Cercariae; Digenea; Melanoides tuberculata; Philophthalmidae; Rediae.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )