Acta Parasitologica

, Volume 56, Issue 4, pp 371–376

Spermatophores in Dermopristis cairae Whittington et Kearn, 2011 (Monogenea, Microbothriidae)

Authors

    • School of Biological SciencesUniversity of East Anglia
  • Ian D. Whittington
    • Monogenean Research Laboratory, Parasitology SectionThe South Australian Museum
    • Marine Parasitology Laboratory, School of Earth and Environmental Sciences (DX 650 418)The University of Adelaide
    • Australian Centre for Evolutionary Biology and BiodiversityThe University of Adelaide
  • Richard Evans-Gowing
    • School of Biological SciencesUniversity of East Anglia
Article

DOI: 10.2478/s11686-011-0078-y

Cite this article as:
Kearn, G.C., Whittington, I.D. & Evans-Gowing, R. Acta Parasit. (2011) 56: 371. doi:10.2478/s11686-011-0078-y

Abstract

Spermatophores are described in the microbothriid monogenean Dermopristis cairae from the giant shovel-nosed ray, Glaucostegus typus (Elasmobranchii, Rhinobatidae). Each spermatophore consists of a fusiform capsule containing sperm and a hollow stalk. The proximal ends of the stalks of fully formed spermatophores were open and located in a recess on the ventral surface close to, but not inside, the vagina and the male reproductive opening. Three adult parasites carried spermatophores attached externally to the ventral surface. One individual carried 3 spermatophores and 2 others a single spermatophore. In addition, in 2 adults, short lengths of what appeared to be stalk remnants were observed attached near the reproductive openings. With regard to spermatophore exchange, the evidence in support of the following 2 possibilities is discussed. (1) Adult specimens of D. cairae carrying fully formed spermatophores ventrally are recipients not donors, having received their spermatophores singly during mating events. (2) Spermatophore carrying adults are donors, their spermatophores being freshly made and on offer to a potential mate. The evidence points to the first of these alternatives as the most likely but this is not conclusive and requires observations on mating between living parasites.

Keywords

Platyhelminthes Monogenea Microbothriidae Dermopristis cairae Glaucostegus typus spermatophores

Copyright information

© © Versita Warsaw and Springer-Verlag Wien 2011