A new species of Kritskyia (Dactylogyridae, Ancyrocephalinae), parasite of urinary bladder and ureters of Leporinus lacustris (Characiformes, Anostomidae) from Brazil - DOI: 10.4025/actascibiolsci.v25i2.2010

Abstract

This paper describes a new species of Kritskyia, K. eirasi n. sp., from the urinary bladder and ureters of Leporinus lacustris, “corró”, an anostomid fish collected in the Upper Paraná River floodplain, Brazil. The new species was included in this genus because of the infection site, the absence of anchor, bar and 4A hooks and the sinistral vaginal aperture. It differs from the type species, K. moraveci and from the other known species of the genus, mainly by the shape of the copulatory complex. The accessory piece is distally complex, serving as a cirrus guide. The base of male copulatory organ, like in congeneric species, is adorned with a sclerotized fringe; however K. eirasi n. sp. presents an elongate projection of this fringe. It also differs from K. boegeri because of the lacking of sclerotized disk in vaginal aperture; and from K. annakohnae due to the absence of keel-like projection in the body's left margin.