Folia Parasitologica, vol. 56 (2009), issue 1

Folia Parasitologica 56[1] 29-35 (2009) | 10.14411/fp.2009.005

Two new species of Neoentobdella (Monogenea: Capsalidae: Entobdellinae) from the skin of Australian stingrays (Dasyatidae)

Ian D. Whittington1,2, Graham C. Kearn3
1 Monogenean Research Laboratory, Parasitology Section, The South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia
2 Marine Parasitology Laboratory, School of Earth and Environmental Sciences (DX 650 418), The University of Adelaide, North Terrace, Adelaide, South Australia 5005, Australia
3 School of Biological Sciences, University of East Anglia, Norwich, Norfolk, NR4 7TJ, UK

Two new species of entobdelline (capsalid) monogeneans are described from the skin of Australian dasyatid stingrays, namely Neoentobdella cribbi sp. n., a small parasite from the estuarine stingray, Dasyatis fluviorum Ogilby (Elasmobranchii: Dasyatidae) and Neoentobdella baggioi sp. n., a relatively large parasite from the porcupine ray, Urogymnus asperrimus (Bloch et Schneider) (Elasmobranchii: Dasyatidae). A striking feature of both of these new parasite species is a pad, possibly located within the genital atrium, armed with rows of closely spaced, rod-shaped microsclerites. Both species also possess a muscular papilla in the genital tract and a club-shaped structure near the common genital opening on the left lateral margin of the body. In N. cribbi, the latter feature is large and located anterior to the genital pad and in N. baggioi, it is small and located in a more posterior position. Similar embellishments in the genital area occur in N. natans Kearn et Whittington, 2005 and in N. parvitesticulata Kearn et Whittington, 2005, while other species (e.g. N. garneri Whittington et Kearn, 2009 and N. taiwanensis Whittington et Kearn, 2009) lack these features and differ also in functional aspects of the male copulatory apparatus and the haptor. Separate generic status for these two groupings is indicated, but must await a comparative and comprehensive review of all Neoentobdella spp.

Keywords: Platyhelminthes, Monogenea, entobdellines, Neoentobdella cribbi sp. n., Neoentobdella baggioi sp. n., Dasyatidae, stingrays, Dasyatis fluviorum, Urogymnus asperrimus, spermatophores

Received: September 22, 2008; Accepted: December 18, 2008; Published: March 1, 2009


References

  1. KEARN G.C. 1964: The attachment of the monogenean Entobdella soleae to the skin of the common sole. Parasitology 54: 327-335 Go to original source...
  2. KEARN G.C. 1970: The production, transfer and assimilation of spermatophores by Entobdella soleae, a monogenean skin parasite of the common sole. Parasitology 60: 301-311 Go to original source... Go to PubMed...
  3. KEARN G.C. 1988: Orientation and locomotion in the monogenean parasite Entobdella soleae on the skin of its host (Solea solea). Int. J. Parasitol. 18: 753-759 Go to original source... Go to PubMed...
  4. KEARN G.C., WHITTINGTON I.D. 1992: Diversity of reproductive behaviour in platyhelminth parasites: insemination in some benedeniine (capsalid) monogeneans. Parasitology 104: 489- 496 Go to original source...
  5. KEARN G.C., WHITTINGTON I.D. 2005: Neoentobdella gen. nov. for species of Entobdella Blainville in Lamarck, 1818 (Monogenea, Capsalidae, Entobdellinae) from stingray hosts, with descriptions of two new species. Acta Parasitol. 50: 32-48
  6. KEARN G.C., WHITTINGTON I.D., EUZET L. 2006: The handling and fate of spermatophores in Neoentobdella diadema and N. apiocolpos (Monogenea: Capsalidae: Entobdellinae). Folia Parasitol. 53: 57-62 Go to original source... Go to PubMed...
  7. KEARN G.C., WHITTINGTON I.D., EVANS -GOWING R. 1995: Use of cement for attachment in Neocalceostomoides brisbanensis, a calceostomatine monogenean from the gill chamber of the blue catfish, Arius graeffei. Int. J. Parasitol. 25: 299-306 Go to original source... Go to PubMed...
  8. KEARN G.C., WHITTINGTON I.D., EVANS -GOWING R. 2007: A revision of Entobdella Blainville in Lamarck, 1818, with special emphasis on the nominal (type) species "Entobdella hippoglossi (Mueller, 1776) Blainville, 1818" (Monogenea: Capsalidae: Entobdellinae) from teleost flatfishes, with descriptions of three new species and a new genus. Zootaxa 1659: 1-54
  9. LLEWELLYN J., EUZET L. 1964: Spermatophores in the monogenean Entobdella diadema Monticelli from the skin of sting-rays, with a note on the taxonomy of the parasite. Parasitology 54: 337- 344 Go to original source...
  10. WHITTINGTON I.D., DEVENEY M.R., WYBORN S.J. 2001: A revision of Benedenia Diesing, 1858 including a redescription of B. sciaenae (van Beneden, 1856) Odhner, 1905 and recognition of Menziesia Gibson, 1976 (Monogenea: Capsalidae). J. Nat. Hist. 35: 663-777 Go to original source...
  11. WHITTINGTON I.D., KEARN G.C. 2008: Trimusculotrema heronensis sp. nov. (Monogenea: Capsalidae) from the skin of the pink whipray Himantura fai (Elasmobranchii: Dasyatidae) from Heron Island, Queensland, Australia. Acta Parasitol. 53: 251-257 Go to original source...
  12. WHITTINGTON I.D., KEARN G.C. 2009: Two new species of entobdelline skin parasites (Monogenea, Capsalidae) from the blotched fantail ray, Taeniura meyeni, in the Pacific Ocean, with comments on spermatophores and the male copulatory apparatus. Acta Parasitol. 54: 12-21 Go to original source...