Saccocoelioides kirchneri n. sp. (Digenea: Haploporidae) from the killifish Cnesterodon decemmaculatus (Cyprinodontiformes: Poeciliidae) from Argentina, morphological and molecular description.

MARTORELLI SERGIO R.; MONTES, MARTIN MIGUEL; BARNECHE JORGE; REIG CARDARELLA GERMAN FLAVIO; STEVE S. CURRAN

JOURNAL OF HELMINTHOLOGY

CAMBRIDGE UNIV PRESS

Lugar: Cambridge; Año: 2022

0022-149X

This paper presents a new haploporid digenean that expands the number of species of Saccoccoelioides to 27. The new species, Saccocoelioides kirchneri n. sp. was collected from the intestine of Cnesterodon decemmaculatus (Poeciliidae, Cyprinodontiformes) from Lago del Bosque, La Plata, Argentina. The new species possesses the diagnostic features for Saccocoelioides: a sac like ceca; the vitellarium confined in two irregular groups of follicles distributed between the ventral sucker and the anterior margin of the testis; and a uterus confined largely in the hindbody, but encroaching into the range of ventral sucker. The new species is differentiated from the 26 congeners by the body size, pharynx size, ventral sucker size, posterior extent of ceca, posterior extent of uterus, and egg size. Saccocoelioides kirchneri n. sp. also is supported by the molecular analysis.