Advertisement

Systematic Parasitology

, 71:145 | Cite as

Two new species of Pseudorhabdosynochus Yamaguti, 1958 (Monogenea: Diplectanidae) from the deep-sea grouper Epinephelus morrhua (Val.) (Perciformes: Serranidae) off New Caledonia

  • Jean-Lou Justine
Article

Abstract

Three species of monogeneans were collected from Epinephelus morrhua, a deep-sea grouper from the external slope of the coral reef, off New Caledonia, South Pacific, and are the first parasites recorded from this fish species. Pseudorhabdosynochus morrhua n. sp. is characterised by: a sclerotised vagina with small sclerotised chambers and a short secondary canal; squamodiscs with central rows of rodlets which form closed ovals; and a scaly tegument. P. variabilis n. sp. has: a male quadriloculate organ with a characteristic structure; a sclerotised vagina in which the primary canal, secondary canal and accessory structure are very long and the different parts have various arrangements in different specimens; its squamodiscs have central rows of rodlets which form closed circles; and a smooth tegument. A prominent vaginal structure, comparable to that of P. variabilis, has been found only in P. dolicocolpos Neifar & Euzet, 2007, but the species can be distinguished by details of the vagina and other structures. A species of Haliotrema Johnson & Tiegs, 1922 (Ancyrocephalidae) is reported but not described. Specimens of each of the three species were present in similar numbers.

Keywords

Outer Slope Outer Length Vitelline Field Primary Canal Secondary Canal 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Résumé

Trois espèces de monogènes ont été récoltées d’Epinephelus morrhua, un mérou de profondeur de la pente externe du récif corallien au large de la Nouvelle-Calédonie, Pacifique Sud, et sont les premiers parasites mentionnés de cette espèce de poisson. Pseudorhabdosynochus morrhua n. sp. est caractérisé par un vagin sclérifié avec des petits chambres sclérifiées et un canal secondaire court, des squamodisques avec des ovales fermés au centre, et un tégument écailleux. P. variabilis n. sp. a un organe tétraloculé mâle avec une structure caractéristique, un vagin sclérifié dans lequel le canal primaire, le canal secondaire et la structure accessoire sont très longs et dont les différentes parties sont disposées de manière variable selon les spécimens. Ses squamodisques ont des cercles fermés au centre et son tégument est lisse. Une structure vaginale originale comparable à celle de P. variabilis a été trouvée seulement chez P. dolicocolpos Neifar & Euzet, 2007, mais les espèces peuvent être distinguées par des détails du vagin et d’autres structures. Une espèce d’Haliotrema Johnson & Tiegs, 1922 (Ancyrocephalidae) est mentionnée mais non décrite. Les spécimens de chacune des trois espèces étaient en nombre similaire.

Notes

Acknowledgements

Sophie Olivier, student, participated in the fishing operations and parasitological survey and in the preparation of slides. Andreas Wallberg (Uppsala University, Sweden) participated in one fishing cruise. Sam Tereua (IRD) provided safe navigation and excellent fishing skills on board the R/V ‘Coris’. Identification of the hosts was kindly confirmed (from photographs) by John E. Randall (Bishop Museum, Hawai’i). Angelo di Matteo provided technical help.

References

  1. Beverley-Burton, M., & Suriano, D. M. (1981). A revision of Cycloplectanum Oliver, 1968 (Monogenea: Diplectanidae) and descriptions of C. hongkongensis n. sp. and C. lantauensis n. sp. from Epinephelus spp. (Serranidae) in the South China Sea. Canadian Journal of Zoology, 59, 1276–1285.CrossRefGoogle Scholar
  2. Craig, M. T., & Hastings, P. A. (2007). A molecular phylogeny of the groupers of the subfamily Epinephelinae (Serranidae) with a revised classification of the Epinephelini. Ichthyological Research, 54, 1–17.CrossRefGoogle Scholar
  3. Gibson, D. I., Bray, R. A., & Harris, E. A. (2005). Host-parasite database of the natural history museum, London. http://www.nhm.ac.uk/research-curation/projects/host-parasites/
  4. Heemstra, P. C., & Randall, J. E. (1993). FAO Species Catalogue. Groupers of the world (Family Serranidae, Subfamily Epinephelinae). An annotated and illustrated catalogue of the grouper, rockcod, hind, coral grouper and lyretail species known to date (Vol. 16, 382 pp). Rome: FAO. FAO Fisheries Synopsis, No. 125.Google Scholar
  5. Journo, C., & Justine, J.-L. (2006). Laticola dae n. sp (Monogenea: Diplectanidae) from Epinephelus maculatus (Perciformes: Serranidae) off New Caledonia. Systematic Parasitology, 64, 173–180.PubMedCrossRefGoogle Scholar
  6. Justine, J.-L. (2005a). Species of Pseudorhabdosynochus Yamaguti, 1958 (Monogenea: Diplectanidae) from Epinephelus fasciatus and E. merra (Perciformes: Serranidae) off New Caledonia and other parts of the Indo-Pacific Ocean, with a comparison of measurements of specimens prepared using different methods, and a description of P. caledonicus n. sp. Systematic Parasitology, 62, 1–37.PubMedCrossRefGoogle Scholar
  7. Justine, J.-L. (2005b). Pseudorhabdosynochus hirundineus n. sp. (Monogenea: Diplectanidae) from Variola louti (Perciformes: Serranidae) off New Caledonia. Systematic Parasitology, 62, 39–45.PubMedCrossRefGoogle Scholar
  8. Justine, J.-L. (2007a). Parasite biodiversity in a coral reef fish: twelve species of monogeneans on the gills of the grouper Epinephelus maculatus (Perciformes: Serranidae) off New Caledonia, with a description of eight new species of Pseudorhabdosynochus (Monogenea: Diplectanidae). Systematic Parasitology, 66, 81–129.PubMedCrossRefGoogle Scholar
  9. Justine, J.-L. (2007b). Pseudorhabdosynochus argus n. sp. (Monogenea: Diplectanidae) from Cephalopholis argus, P. minutus n. sp. and Diplectanum nanus n. sp. from C. sonnerati and other monogeneans from Cephalopholis spp. (Perciformes: Serranidae) off Australia and New Caledonia. Systematic Parasitology, 68, 195–215.PubMedCrossRefGoogle Scholar
  10. Justine, J.-L. (2008). Diplectanum parvus sp. nov. (Monogenea, Diplectanidae) from Cephalopholis urodeta (Perciformes, Serranidae) off New Caledonia. Acta Parasitologica, 53, 127–132.CrossRefGoogle Scholar
  11. Justine, J.-L., & Sigura, A. (2007). Monogeneans of the malabar grouper Epinephelus malabaricus (Perciformes, Serranidae) off New Caledonia, with a description of six new species of Pseudorhabdosynochus (Monogenea: Diplectanidae). Zootaxa, 1543, 1–44.Google Scholar
  12. Kritsky, D. C., & Beverley-Burton, M. (1986). The status of Pseudorhabdosynochus Yamaguti, 1958, and Cycloplectanum Oliver, 1968 (Monogenea: Diplectanidae). Proceedings of the Biological Society of Washington, 99, 17–20.Google Scholar
  13. Laboute, P., & Grandperrin, R. (2000). Poissons de Nouvelle-Calédonie. Nouméa (520 pp). New Caledonia: Éditions Catherine Ledru.Google Scholar
  14. Malmberg, G. (1957). Om förekomsten av Gyrodactylus på svenska fiskar (In Swedish.) Skrifter Utgivna av Södra Sveriges Fiskeriförening, Årsskrift, 1956, 19–76.Google Scholar
  15. Neifar, L., & Euzet, L. (2007). Five new species of Pseudorhabdosynochus (Monogenea: Diplectanidae) from the gills of Epinephelus costae (Teleostei: Serranidae). Folia Parasitologica, 54, 117–128.PubMedGoogle Scholar
  16. Poulin, R., & Justine, J. L. (2008). Linking species abundance distributions and body size in monogenean communities. Parasitology Research, 103, 187–193.CrossRefPubMedGoogle Scholar
  17. Sigura, A., & Justine, J.-L. (2008). Monogeneans of the speckled blue grouper Epinephelus cyanopodus (Perciformes, Serranidae) off New Caledonia, with a description of four new species of Pseudorhabdosynochus and one new species of Laticola (Monogenea: Diplectanidae), with evidence of monogenean faunal changes according to the size of fish. Zootaxa, 1695, 1–44.Google Scholar
  18. Yamaguti, S. (1938). Studies on the helminth fauna of Japan. Part 24. Trematodes of fishes, V. Japanese Journal of Zoology, 8, 15–74.Google Scholar
  19. Yamaguti, S. (1958). Studies on the helminth fauna of Japan. Part 53. Trematodes of fishes, XII. Publications of the Seto Marine Biological Laboratory, 7, 53–88.Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  1. 1.Équipe Biogéographie Marine TropicaleUnité Systématique, Adaptation, Évolution (CNRS, UPMC, MNHN, IRD), Institut de Recherche pour le DéveloppementNoumea CedexNew Caledonia

Personalised recommendations