title: New species of Gieysztoria (Platyhelminthes, Rhabdocoela) from Peruvian Amazon floodplain with description of their stylet ultrastructure.
abstract: The free-living Platyhelminthes of the Amazon basin are poorly known. Presently only four turbellarian species have been mentioned from the Amazon river, a fact that confirms the lack of information on this kind of faunas in this huge basin. Three new species of Gieysztoria from Amazonian floodplain in Peru are described herein: G. chiqchi n. sp., G. kasasapa n. sp. and G. sasa n. sp. The samples were taken in the Pacaya-Samiria National Reserve (Peru) during September 2002. Besides the usual description of the stylet based on whole mounted specimens, we provide a complementary description using SEM, which allowed differentiation of the new species within the currently yet imperfect picture of the Amazonian turbellarian fauna. Although further research is desired, current findings are suggestive of high diversity of free-living Turbellaria in the surveyed region.
authors.affiliation: CONICET. División Zoología Invertebrados, Museo de La Plata (FCNyM-UNLP), La Plata, Republica Argentina. cdambor@fcnym.unlp.edu.ar
authors.forename: Cristina
authors.initials: C
authors.lastname: Damborenea
authors.forename: Francisco
authors.initials: F
authors.lastname: Brusa
authors.forename: Carolina
authors.initials: C
authors.lastname: Noreña
mesh_terms: D000825:Animal Structures / Q000033:anatomy & histology / Q000648:ultrastructure; D000818:Animals; D005260:Female; D008297:Male; D010568:Peru; D010986:Platyhelminths / Q000033:anatomy & histology* / Q000145:classification* / Q000302:isolation & purification / Q000648:ultrastructure