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Hydrobiologia

, Volume 619, Issue 1, pp 145–154 | Cite as

Myzostoma fuscomaculatum (Myzostomida), a new myzostome species from False Bay, South Africa

  • Déborah Lanterbecq
  • Tessa Hempson
  • Charles Griffiths
  • Igor Eeckhaut
Primary research paper
  • 104 Downloads

Abstract

A new myzostome species, described here as Myzostoma fuscomaculatum n. sp. was collected on Tropiometra carinata in False Bay (South Africa), during a survey of symbionts associated with comatulid crinoid species. M. fuscomaculatum n. sp. occurred only on T. carinata and not on the more common crinoid, Comanthus wahlbergi. It infested 61.7% of the 120 host specimens collected, of which 64.9% (48 specimens) hosted more than one individual (maximum of 32). M. fuscomaculatum n. sp. was always located on the host’s arms and pinnules and was cryptically coloured, closely matching the colour pattern of the host. This is the first record of myzostomes from the cool temperate waters of South Africa’s Atlantic coast. The new species is morphologically close to M. gopalai Subramaniam, 1938, collected on T. encrinus in Madras Harbour. M. fuscomaculatum n. sp. differs from M. gopalai in lacking marginal cirri at the adult stage, the presence of three pairs of digestive diverticula, by the position of its lateral organs and by the shape of the manubrium. Molecular phylogenetic analyses based on 18S and 16S rDNA placed M. fuscomaculatum n. sp. into a clade including Hypomyzostoma, Myzostoma and Mesomyzostoma species.

Keywords

Myzostomida Annelida Taxonomy South Africa Atlantic Ocean Phylogenetic analysis 

Notes

Acknowledgements

We thank G. Jones and S. Albert for the first photograph of M. fuscomaculatum n. sp., and P. Southwood and G. Zsilavecz of the Southern Underwater Research Group (SURG) for their assistance in the collection of specimens. Many thanks are also expressed to R. Boshoff and the South African National Parks Marine Unit for diving assistance and the use of their boat. Thanks are due to M. Todesco and B. Joly for assistance in the sequencing and histological sections. The authors thank Mark J. Grygier for his courtesy in giving the authorization to publish some of his personal notes, and the two reviewers for helpful comments on the manuscript. The National Fund for Scientific Research, Belgium (FRFC) provided financial support for histological sections, SEM and molecular analyses. Tessa Hempson and Charles Griffiths were supported by a grant from the SEAChange Programme of the South African National Research Foundation. Déborah Lanterbecq was supported by a Postdoctoral Research Associate grant from the ‘Fonds de la recherche scientifique’ (FNRS).

References

  1. Bleidorn, C., I. Eeckhaut, L. Podsiadlowski, N. Schult, D. McHugh, K. M. Halanych, M. C. Milinkovitch & R. Tiedemann, 2007. Mitochondrial genome and nuclear sequence data support Myzostomida as part of the annelid radiation. Molecular Biology and Evolution 24: 1690–1701.PubMedCrossRefGoogle Scholar
  2. Branch, G. M., C. L. Griffiths, M. L. Branch & L. E. Beckley, 1994. Two Oceans, A Guide to the Marine Life of Southern Africa. David Philip, Cape Town.Google Scholar
  3. Brusca, R. C. & G. J. Brusca, 1990. Invertebrates. Sinauer Associates, Sunderland, MA.Google Scholar
  4. Clark, A. H. & F. W. E. Rowe, 1971. Monograph of Shallow Water Indo-West Pacific Echinoderms. British Museum (Natural History), London.Google Scholar
  5. Dunn, C. W., A. Hejnol, D. Q. Matus, K. Pang, W. E. Browne, S. A. Smith, E. Seaver, G. W. Rouse, M. Obst, G. D. Edgecombe, M. V. Sørensen, S. H. D. Haddock, A. Schmidt Rhaesa, A. Okusu, R. M. Kristensen, W. C. Wheeler, M. Q. Martindale & G. Giribet, 2008. Broad phylogenomic sampling improves resolution of the animal tree of life. Nature 452: 745–749.PubMedCrossRefGoogle Scholar
  6. Eeckhaut, I., M. J. Grygier & D. Deheyn, 1998. Myzostomes from Papua New Guinea, with related Indo-West Pacific distribution records and description of five new species. Bulletin of Marine Science 62: 841–886.Google Scholar
  7. Eeckhaut, I. & D. Lanterbecq, 2005 Myzostomida: a review of their ultrastructure and phylogeny. In Bartholomaeus, T. & G. Purschke (eds), Morphology, Molecules and Evolution of the Polychaeta and Related Taxa. Hydrobiologia 535536:253–275Google Scholar
  8. Eeckhaut, I., D. McHugh, P. Mardulyn, R. Tiedemann, D. Monteyne, M. Jangoux & M. C. Milinkovitch, 2000. Myzostomida: a link between trochozoans and flatworms? Proceedings of the Royal Society of London B 267: 1383–1392.CrossRefGoogle Scholar
  9. Felsenstein, J., 1985. Phylogenies and the comparative method. The American Naturalist 125: 1–15.CrossRefGoogle Scholar
  10. Gabe, M., 1968. Techniques Histologiques. Masson et Cie, Paris.Google Scholar
  11. Gilbert, D. G., 1996. SeqPup version 0.6. Published electronically on the Internet, available via anonymous ftp to ftp.bio.indiana.edu.Google Scholar
  12. Graff, L., 1877. Das Genus Myzostoma (F.S. Leuckart). Wilhelm Engelmann, Leipzig.Google Scholar
  13. Grygier, M. J., 1990. Distribution of Indo-Pacific Myzostoma and host specificity of comatulid-associated Myzostomida. Bulletin of Marine Science 47: 182–191.Google Scholar
  14. Grygier M. J., 1992. Hong Kong Myzostomida and their Indo-Pacific distributions. In Morton, B. (ed.), The Marine Flora and Fauna of Hong Kong and Southern China, III. Proceedings of the 4th International Marine Biology Workshop, Hong Kong University Press, Hong Kong: 131–147.Google Scholar
  15. Grygier, M. J., 2000. Class Myzostomida. In Beesley, P. L., G. J. B. Ross & Glasby (eds), Polychaetes and Allies: The Southern Synthesis, Fauna of Australia, Vol. 4A. Polychaeta, Myzostomida, Pogonophora, Echiura, Sipuncula. CSIRO Publishing, Melbourne: 297–330.Google Scholar
  16. Lanterbecq, D., G. W. Rouse, M. C. Milinkovitch & I. Eeckhaut, 2006. Molecular phylogenetic analyses indicate multiple independent emergences of parasitism in Myzostomida (Protostomia). Systematic Biology 55(2): 208–227.PubMedCrossRefGoogle Scholar
  17. Nylander, J. A. A., 2002. MrModeltest, version 1.1b. Available from the authors at: http://www.ebc.uu.se/systzoo/staff/nylander.html.
  18. Passamaneck, Y. & K. M. Halanych, 2006. Lophotrochozoan phylogeny assessed with LSU and SSU data: evidence of lophophorate polyphyly. Molecular Phylogenetics and Evolution 40: 20–28.PubMedCrossRefGoogle Scholar
  19. Perrier, E., 1897. Philocrinida. Traité de Zoologie, Vol. IV. Masson, Paris.Google Scholar
  20. Rambaut, A., 1996. SE-AL: Sequence alignment Editor, version 2.0a11. Oxford University. Available at http://evolve.zoo.ox.ac.uk/software.php.
  21. Rao, K. H. & R. Sowbhagyavathi, 1972. Observations on the associates of crinoids at Waltair Coast with special reference to myzostomes. Proceedings of the Indian National Science Academy, B, Biological sciences 38(5, 6): 360–366.Google Scholar
  22. Ronquist, F. & J. P. Huelsenbeck, 2003. MRBAYES 3: Bayesian phylogenetic inference under mixed models. Bioinformatics 19: 1572–1574.PubMedCrossRefGoogle Scholar
  23. Rouse, G. W. & K. Fauchald, 1997. Cladistics and polychaetes. Zoologica Scripta 26: 139–204.CrossRefGoogle Scholar
  24. Ruppert, E. E. & R. D. Barnes, 1994. Invertebrate Zoology. Saunders College Publishing, New York.Google Scholar
  25. Subramaniam, M. K., 1938. On Myzostoma gopalai species nova from the Madras harbour. Proceedings of the Indian Academy of Sciences, B 7: 270–276.Google Scholar
  26. Swofford D., 1998. PAUP*: phylogenetic analysis using parsimony (*and other methods). Beta version 4.0.b1, Sinauer, Sunderland.Google Scholar
  27. Thompson, J. D., T. J. Gibson, F. Plewniak, F. Jeanmougin & D. G. Higgins, 1997. The CLUSTAL X windows interface: flexible strategies for multiple sequence alignment aided by quality analysis tools. Nucleic Acids Research 24: 4876–4882.CrossRefGoogle Scholar
  28. Zrzavy, J., V. Hypsa & D. F. Tietz, 2001. Myzostomida are not Annelids: molecular and morphological support for a clade of animals with anterior sperm flagella. Cladistics 17: 170–198.Google Scholar

Copyright information

© Springer Science+Business Media B.V. 2008

Authors and Affiliations

  • Déborah Lanterbecq
    • 1
  • Tessa Hempson
    • 2
  • Charles Griffiths
    • 2
  • Igor Eeckhaut
    • 1
  1. 1.Laboratoire de Biologie MarineUniversité de Mons-HainautMonsBelgium
  2. 2.Marine Biology Research Centre and Zoology DepartmentUniversity of Cape TownRondeboschSouth Africa

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