Larvas de digenea en Melanoides tuberculata (Gastropoda: Thiaridae) en Medellín, Colombia

Abstract

RESUMEN: Se describen las larvas de digeneos que se obtuvieron en Melanoides tuberculata (Gastropoda: Thiaridae), molusco dulceacuícola del que se colectaron 125 especíme-nes en el lago del Jardín Botánico Joaquín Antonio Uribe de Medellín. En el laboratoriose individualizaron y se estimuló la emisión cercariana con una fuente luminosa. El 9,6% de los caracoles emitió cercarias. Los moluscos emisores se sacrificaron para obtenerlos demás estadios larvarios. Las larvas se montaron al microscopio, se midieron y luegose dibujaron. Los caracteres morfológicos permitieron establecer la presencia deCentrocestus formosanus (Heterophyidae) y de dos Philophthalmidae. Uno de estos es pri-mer registro para Colombia. Se confirma la sensibilidad de M. tuberculataa Infecciones por digeneos, así como la especificidad de los filoftálmidos por moluscos hospedadoresde la superfamilia Cerithioidea.

ABSTRACT: 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 wasplaced alone and stimulated with light in order to have cercaria emission. 9.6% of thesnails released cercariae. These were separated in three morphologies. From each on, 15 individuals were measured and drawn. Photographs were taken. Based on Theirmorphological 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. tuberculatato infections by digeneans, and the specificity of the family Philophthalmidae to mollusk hosts of the superfamily Cerithioidea are confirmed.