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Simpósio de Biologia Marinha - CEBIMar/USP Traditionally, Oligochaeta and Hirudinea were combined into Clitellata which was considered as a sister group to Polychaeta; both Clitellata and Polychaeta constituted the phylum Annelida, while Echiura and Pogonophora were treated as separate phyla. Thus the posterior relocation of the brain, which is inferred as having occurred in the phylogeny of the Clitellata, was demonstrated. Consequently, position of the supraoesophageal ganglion (brain) in the Clitellata, far behind the prostomium, was regarded as a secondary structural adaptation to a life spent burrowing through relatively firm terrestrial substrates. www.usp.br /cbm/novo_site/simposio/simp_xviii/resumos/palestra_007.html   (744 words)

Phylogeny of the Annelida and allies   (Site not responding. Last check: 2007-11-03) As is discussed, the probability of a loss of the nuchal organs in Clitellata is higher, which favours the second hypothesis: that nuchal organs are part of the ground pattern of the Annelida and very likely are an autapomorphy of this group. In the former, the absence of nuchal organs in the Clitellata is regarded as a secondary character, in the latter as primary. Since most Clitellata are either limnetic or terrestrial, we must ask which characters are plesiomorphies, taken from their marine stem species without changes. bill.srnr.arizona.edu /classes/182/AnnelidRefs.htm   (5393 words)

AOGSMNP.LitCit An assessment of the phylogeny of the Branchiobdellida (Annelida: Clitellata), using PAUP. Jamieson, B G.M. Phylogenetic and phenetic systematics of the opisthoporous Oligochaeta (Annelida: Clitellata). Taxonomy, systematics, and ecology of aquatic Oligochaeta and Branchiobdellidae (Annelida, Clitellata) of North America, with emphasis on the fauna occurring in Florida. www.inhs.uiuc.edu /~mjwetzel/AOGSMNP.litcit.html   (2657 words)

World bibliography on subterranean Annelida, Clitellata (Aphanoneura - Oligochaeta) Oligochaete worms as biological describers of the interactions between surface and groundwaters: a frist synthesis. World bibliography on subterranean Annelida, Clitellata (Aphanoneura - Oligochaeta). Bibliographie mondiale des Annelida, Clitellata (Aphanoneura - Oligochaeta) souterrains. members.aol.com /blspecies/oligochaeta.htm   (3572 words)

University of Maine at PRESQUE ISLE Sharon Lavoie, a junior biology major from St. David, recently attended the 9th International Symposium on Aquatic Oligochaetes held in Wageningen, The Netherlands. Dr. Gelder and Sharon presented a joint paper entitled, "The identification of species groups in the Branchiobdellida (Clitellata: Annelida), or crayfish worms, using jaw morphology." The results were obtained during Sharon's research project under a Research Methods in Science course taken in fall 2002. Dr. Gelder presented a second paper entitled, "Autochthonous Branchiobdellidans (Annelida: Clitellata) on the Major Commercial Species of North America Crayfish (Crustacea: Astacoidea) with Information on the Ectosymbionts' Introduction into Eurasia." North American crayfishes have been commercially introduced into many countries around the world except Australia, which bars them. www.umpi.maine.edu /flash/news/10-31-03d.html   (259 words)

BOTW Directory - Science > Biology > Plants and Animals > Animalia > Annelida > Clitellata Comments on the Classification of the Clitellata - Presents abstract of the article by Perry C. Holt. Phylogenetic Position of the Clitellata and the Echiura - Presents a study by G. Purschke, et. Phylogenetics of Clitellata - Presents online discussion by Martin P. Rapidly Evolving Lineages Impede the Resolution of Phylogenetic Relationships Among Clitellata - Presents summary of the study by Martin P, et. botw.org /top/Science/Biology/Plants_and_Animals/Animalia/Annelida/Clitellata   (187 words)

Adrian Pinder   (Site not responding. Last check: 2007-11-03) Pinder, A.M. New species and records of Phreodrilidae (Annelida: Clitellata) from Western Australia. Pinder, A.M. and Halse, S.A. Two new species of Ainudrilus (Clitellata: Tubificidae) from south-western Australia, with notes on Ainudrilos nharna Pinder and Brinkhurst. Pinder, A.M. and Erséus, C. New Phreodrilidae (Annelida: Clitellata) from Tasmanian estuaries. science.calm.wa.gov.au /people/?sid=95   (1268 words)

NABS - Classified ad- PhD STUDENTSHIP in Systematics of Clitellata (Annelida) - Göteborg University, Göteborg, Sweden NABS - Classified ad- PhD STUDENTSHIP in Systematics of Clitellata (Annelida) - Göteborg University, Göteborg, Sweden PhD STUDENTSHIP in Systematics of Clitellata (Annelida) - Göteborg University, Göteborg, Sweden Applications are invited for a 4-year PhD studentship starting in January 2005 or sooner if possible. www.benthos.org /classified/index.cfm/task/Display/AdID/1392   (223 words)

CiteULike: First report of the aberrant association of branchiobdellidans (Annelida: Clitellata) on blue crabs ...   (Site not responding. Last check: 2007-11-03) CiteULike: First report of the aberrant association of branchiobdellidans (Annelida: Clitellata) on blue crabs (Crustacea: Decapoda) in Chesapeake Bay, Maryland, USA First report of the aberrant association of branchiobdellidans (Annelida: Clitellata) on blue crabs (Crustacea: Decapoda) in Chesapeake Bay, Maryland, USA Note: You or your institution must have access rights to this article. www.citeulike.org /article/580035   (76 words)

Aquatic Oligochaete Biology VIII: Proceedings of the 8th International Symposium on Aquatic Oligochaeta, Held in ... Descriptions of three Pristina species (Naididae, Clitellata) from Amazonian forest soils, including P. marcusi sp. Mysterious ``crystals'': found attached to the epidermal peritoneum of marine tubificid (Annelida: Clitellata) species Pattern formation in embryos of the oligochaete annelid Tubifex: cellular basis for segmentation and specification of segmental identity www.ecampus.com /bk_detail.asp?isbn=1402000901   (523 words)

Leech (Clitellata) - WM on Flickr - Photo Sharing! Leech (Clitellata) - WM on Flickr - Photo Sharing! Leech (Clitellata) - WM To take full advantage of Flickr, you should use a JavaScript-enabled browser and Sign up for a free account, or sign in (if you're already a member). flickr.com /photos/catcoon/100875757   (96 words)

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