Abstract
During taxonomic studies on the Trichobranchidae housed at the Australian Museum, Sydney morphological characters of specimens were found to serve taxonomists on four taxonomic levels – family, genus, species and specimen level. The number of neuropodial uncini per torus and abdominal segments, long considered holding information for species determination, proved to be highly variable within species. Characters found to be consistent within species were e.g., the position of nephridial papillae, shape of branchiae and chaetae, and the development of anterior segments and lateral lappets. Also, staining in methyl green resulted in a clear pattern without intraspecific variability in most cases and is since considered a helpful tool for identification of Trichobranchidae. In this study an overview of morphological characters of Trichobranchidae and their information for taxonomy is given based on the trichobranchid collection of the Australian Museum. Additionally, description of a new species Terebellides jitu sp. nov., formerly treated as a variation of Terebellides narribri, is given. The description of T. narribri is revised.References
Bremec, C.S. & Elias, R. (1999) Species of Terebellides from South Atlantic waters off Argentina and Brazil (Polychaeta: Trichobranchidae). Ophelia, 51, 177–186.
Garraffoni, A.R.S. & Lana, P.C. (2003) Species of Terebellides (Polychaeta, Terebellidae, Trichobranchinae) from the Brazilian coast. Iheringia, 93(4), 355–363.
Garraffoni, A.R.S. & Lana, P.C. (2004) Cladistic analysis of the subfamily Trichobranchinae (Polychaeta: Terebellidae). Journal of the Marine Biological Association of the United Kingdom, 84, 973–982.
Garraffoni, A.R.S., Lana, P.C. & Hutchings, P. (2005) A catalogue of the Trichobranchinae (Polychaeta: Terebellidae) of the world. Zootaxa, 1065, 1–27.
Hutchings, P.A. (2000) Family Trichobranchidae, 232–235. In: Beesley, P.L., Ross, G.J.B. & Glasby, C.J., (Eds) Polychaetes & Allies: The Southern Synthesis. Fauna of Australia. Vol. 4A Polychaeta, Myzostomida, Pogonophora, Echiura, Sipuncula. CSIRO Publishing, Melbourne xii, pp 1–465.
Hutchings, P.A. (2007) New species of deep-sea Terebellidae and Trichobranchidae (Polychaeta) (Sedentary Species III). Galathea Report, 21, 75–90.
Hutchings P.A. & Peart R. (2000) A revision of the Australian Trichobranchidae (Polychaeta). Invertebrate Taxonomy, 14(2), 225–272.
Kingston, P.F. & Mackie, A.S.Y. (1980) Octobranchus floriceps n.sp. (Polychaeta: Trichobranchidae) from the Northern North Sea with a re-examination of O. antarcticus Monro. Sarsia, 65, 249–254.
Parapar, J. & Moreira, J. (2008a) Redescription of Terebellides kerguelensis stat. nov. (Polychaeta: Trichobranchidae) from, Antarctic and subantarctic waters. Helgoland Marine Research, 62, 143–152.
Parapar, J. & Moreira, J. (2008b) Revision of three species of Terebellides (Polychaeta: Trichobranchidae) described by C. Hessle in 1917 from the Southern Ocean. Journal of Natural History, 42(17–20), 1261–1275.
Rouse, G.W. & Fauchald, K. (1997) Cladistics and polychaetes. Zoologica Scripta, 26, 139–204.
Rouse, G. & Pleijel, F. (2001) Polychaetes. London: Oxford.
Rousset, V., Rouse, G.W., Feral, J.P., Desbruyères, D. & Pleijel, F (2003) Molecular and morphological evidence of Alvinellidae relationships (Terebelliformia, Polychaeta, Annelida). Zoologica Scripta, 32, 185–197.
Sars, M. (1835) Beskrivelser og lagttagelser over nogle maerkelige eller nye I Havet ved den bergenske Kyst lavender Dyr af Polypernes, Acalephernes, Radiaternes, Annelidernes og Molluskernes classer, med en kort Oversigt over de hidtil af Forfatteren sammesteds fundne Arter og deres Forekommen. Thorstein Hallegers Forlag: Bergen.
Solis-Weiss, V., Fauchald, K., & Blankensteyn, A. (1991) Trichobranchidae (Polychaeta) from shallow warm water areas in the western Atlantic Ocean. Proceedings of the Biological Society of Washington, 104(1), 147–158.
Williams, S. J. (1984) The status of Terebellides stroemii (Polychaeta; Trichobranchidae) as a cosmopolitan species, based on a worldwide morphological survey, including description of new species. In: Hutchings, P.A. (Ed) Proceedings of the First International Polychaete Conference, Sydney, Australia, 1984. The Linnean Society of New South Wales: Sydney, 118–142.
Zhong, M., Struck, T.H. & Halanych, K.M. (2008) Phylogenetic information from three mitochondrial genomes of Terebelliformia (Annelida) worms and duplication of the methionine tRNA. Gene, 416, 11–21.