Abstract
A new species of cryptogonimid belonging to the genus Parspina Pearse, 1920 is described from the intestine of Pimelodella gracilis (Valenciennes) in the Paraná River basin, Argentina. Parspina pimelodellae n. sp. is characterised by having: (i) a body length/width ratio of 1:3.6–5.3 at the level of the ventral sucker; (ii) 21 oral spines; (iii) an oral sucker larger than the ventral sucker, with a sucker width ratio of 1:0.6–0.7; (iv) a postcaecal region of 16–19% of the body-length; (v) a compact, transversely elongate ovary, anterior to and well separated from the testes; (vi) small, branched vitelline follicles, extending from the level of the ventral sucker to the anterior margin of the ovary; and (vii) a large seminal vesicle situated posterodorsal to the ventral sucker. A key to the species of Parspina is presented.
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Acknowledgements
The authors are indebted to Dr Alicia A. Gil de Pertierra from the Universidad de Buenos Aires for fruitful comments and suggestions on earlier versions of the manuscript, to Dr Pat Pillit (USNPC) and Lic. Fabían Tricarico (MACN) for the loan of type-material, and to two anonymous referees for their valuable comments which helped to improve the manuscript. This research was supported by the Universidad de Buenos Aires (Grants UBACyT 20020090200511, 20020090200529 and 20020110100199).
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Arredondo, N.J., de Núñez, M.C.O. A new species of Parspina Pearse, 1920 (Digenea: Cryptogonimidae) from Pimelodella gracilis (Valenciennes) (Siluriformes: Heptapteridae) in the Paraná River basin, Argentina, and a key to the genus. Syst Parasitol 84, 81–87 (2013). https://doi.org/10.1007/s11230-012-9394-3
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DOI: https://doi.org/10.1007/s11230-012-9394-3