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Phylum Gastrotricha. In: Zhang, Z.-Q. (Ed.) Animal Biodiversity: An Outline of Higher-level Classification and Survey of Taxonomic Richness (Addenda 2013)



An updated classification of the two orders of the phylum is provided up to family level, and numbers of genera and species described so far are specified. The phylum is composed of two orders: Macrodasyida, with, 9 families, 33 genera (+1 genus incertae sedis) and 338 species (+1 species incertae sedis), and Chaetonotida, with 8 families, 30 genera and 454 species. Current taxonomy is relatively stable for the order Macrodasyida, except for the presence of a monotypic genus which cannot yet be assigned with certainty to any of the existing families. On the contrary, the taxonomy of the order Chaetonotida has been repeatedly revised in the last decades and is still unstable. An integrate taxonomical approach on morphological and molecular bases appears necessary in order to revise the current classification according to phylogenetic relationships.



Gastrotricha, classification, diversity

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Appeltans, W., Ahyong, S.T., Anderson, G., Angel, M.V., Artois, T., Bailly, N., Bamber, R., Barber, A., Bartsch, I., Berta, A., Błaz_ewicz-Paszkowycz, M., Bock, P., Boxshall, G., Boyko, C.B., Nunes Branda˜o, S., Bray, R.A., Bruce, N.L., Cairns, S.D., Chan, T.Y., Cheng, L., Collins, A.G., Cribb, T., Curini-Galletti, M., Dahdouh-Guebas, F., Davie, P.J.F., Dawson, M.N., De Clerck, O., Decock, W., De Grave, S., de Voogd, N.J., Domning, D.P., Emig, C.C., Erse´us, C., Eschmeyer, W., Fauchald, K., Fautin, D.G., Feist, S.W., Fransen, C.H.J.M., Furuya, H., Garcia-Alvarez, O., Gerken, S., Gibson, D., Gittenberger, A., Gofas, S., Go´ mez-Daglio, L., Gordon, D.P., Guiry, M.D., Hernandez, F., Hoeksema, B.W., Hopcroft, R.R., Jaume, D., Kirk, P., Koedam, N., Koenemann, S., Kolb, J.B., Kristensen, R.M., Kroh, A., Lambert, G., Lazarus, D.B., Lemaitre, R., Longshaw, M., Lowry, J., Macpherson, E., Madin, L.P., Mah, C., Mapstone, G., McLaughlin, P.A., Mees, J., Meland, K., Messing, C.G., Mills, C.E., Molodtsova, T.N., Mooi, R., Neuhaus, B., Ng, P.K.L., Nielsen, C., Norenburg, J., Opresko, D.M., Osawa, M., Paulay, G., Perrin, W., Pilger, J.F., Poore, G.C.B., Pugh, P., Read, G.B., Reimer, J.D., Rius, M., Rocha, R.M., Saiz-Salinas, J.I., Scarabino, V., Schierwater, B., Schmidt-Rhaesa, A., Schnabel, K.E., Schotte, M., Schuchert, P., Schwabe E., Segers, H., Self-Sullivan, C., Shenkar, N., Siegel, V., Sterrer, W., Stö hr, S., Swalla, B., Tasker, M.L., Thuesen, E.V., Timm, T., Todaro, M.A., Turon, X., Tyler, S., Uetz, P., van der Land, J., Vanhoorne, B., van Ofwegen, L.P., van Soest, R.W.M., Vanaverbeke, J., Walker-Smith, G., Walter T.C., Warren, A., Williams, G.C., Wilson, S.P. & Costello, M.J. (2012) The magnitude of global marine species diversity. Current Biology, 22 (23), 2189–2202.

Artois, T., Fontaneto, D., Hummon, W.D., McInnes, S.J., Todaro, M.A., Sørensen, M.V. & Zullini, A. (2011). Ubiquity of microscopical animals? Evidence from the morphological approach in species identification. In: Fontaneto D., Biogeography of Microscopic Organisms: Is Everything Small Everywhere? The Systematics Association, Cambridge Univ. Press, N.Y., pp 244–283.

Balsamo, M., d’Hondt, J.L., Kisielewski, J. & Pierboni, L. (2008) Global diversity of gastrotrichs (Gastrotricha) in fresh waters. Hydrobiologia, 595, 85–91.

Balsamo, M., d'Hondt, J.L., Pierboni, L. & Grilli, P. (2009) Taxonomic and nomenclatural notes on freshwater Gastrotricha. Zootaxa, 2158, 1–19.

Giere, O. (2009) Meiobenthology. The Microscopic Motile Fauna of Aquatic Sediments. Springer Verlag, Berlin, 527 pp.

Hummon, W.D. (2008) Gastrotricha of the North Atlantic Ocean: 1. Twenty four new and two redescribed species of Macrodasyida. Meiofauna Marina, 16, 117–174.

Hummon, W.D. (2009) (revision of 2001, 2004, 2007) Global database for marine Gastrotricha (Taxonomic, Geographic Bibliographic and Video). Available from: or (accessed 17 July 2012).

Hummon, W.D. & Todaro, M.A. (2010) Analytic taxonomy and notes on marine, brackish-water and estuarine Gastrotricha. Zootaxa, 2392, 1–32.

Hyman, L.H. (1951) The Invertebrates, Vol. III Acanthocephala, Aschelminthes and Ectoprocta. McGraw-Hill, New York, 573 pp.

Kieneke, A., Arbizu, P.M. & Fontaneto, D. (2012)Spatially structured populations with a low level of cryptic diversity in European marine Gastrotricha. Molecular Ecology, 21(5), 1239–1254.

Kisielewski, J. (1991) Inland-water Gastrotricha from Brazil. Annales Zoologici (Warsaw), 43 (Suppl. 2), 1–168.

Kisielewski, J. (1997) On the subgeneric division of the Genus Chaetonotus Ehrenberg. Annales Zoologici (Warsaw), 46, 145–151.

Kisielewski, J. (1998) Brzuchorzeski (Gastrotricha). Fauna Slodkowodna Polskie, 31, 1–156.

Rao, G.C. & Clausen, C. (1970) Planodasys marginalis gen. et sp. nov. and Planodasyidae fam. nov. (Gastrotricha Macrodasyoidea). Sarsia, 42, 73–82.

Remane, A. (1925) Organisation und systematische Stellung der aberranten Gastrotrichen. Verhandlungen der Deutschen Zoologischen Gesellschaft, 30, 121–128.

Remane, A. (1936) Gastrotricha, In: H.G. Bronns (Ed.), Klassen Ordnungen des Tierreichs, Band 4, Abteilung II, Buch I, Teil 2, Liefrungen 1–2. Akademie Verlagsgesellschaft, Berlin, pp. 1–142.

Schwank, P. (1990) Gastrotricha. In: J. Schwoerbel & P. Zwick, (Eds.), Süßwasserfauna von Mitteleuropa. Gustav Fischer, Stuttgart, pp. 1–252.

Zelinka, C. (1889) Die Gastrotrichen. Eine Monographische Darstellung ihrer Anatomie, Biologie und Systematik. Zeitschrift für Wissenschaftliche Zoologie, 49, 209–384.


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