Table Of Content

Contents Preface List of participants Taxonomy and geographic distribution Tenagodrilus musculus, a new genus and species of Lumbriculidae (Clitellata) from a tempo- rary pond in Alabama, USA by M.C. Eckroth & R.O. Brinkhurst Kathrynella, a new oligochaete genus from Guyana by P. Omodeo Oligochaetes (Naididae, Tubificidae, Opistocystidae, Enchytraeidae, Sparganophilidae and Alluroididae) of Guyana by D.F. Stacey & K.A. Coates Species separation and identification in the Enchytraeidae (Oligochaeta, Annelida): combining morphology with general protein data by R.M. Schmelz Distribution, abundance and habitat types Aquatic Oligochaeta in Italy, with special reference to Naididae by A. di Chiara Paoletti & B. Sambugar The distribution of Oligochaeta on an exposed rocky shore in southeast Ireland by B. Healy Oligochaeta and Aphanoneura in ancient lakes: a review by P. Martin Distribution patterns of aquatic oligochaetes inhabiting watercourses in the Northwestern Iberian Peninsula by E. Martinez-Ansemil & R. Collado The effect of water movement on the distribution of Oligochaeta in lakes by T.D. Slepukhina Oligochaeta of Lake Taimyr: a preliminary survey Influence of grain size on the distribution of tubificid oligochaete species by G. Sauter & H. Giide Oligochaetes in the southern basin of the Venetian Lagoon: community composition, species abundance and biomass by S. Casellato 103-114 vi Population dynamics Seasonal dynamics of aufwuchs Naididae (Oligochaeta) on Phragmites australis in a eutrophic lake by B. Léhlein 115-132 Age, stage and size structure as population state variables for Tubifex tubifex (Oligochaeta, Tubificidae) by A. Pasteris, G. Bonomi & C. Bonacina 125-132 Energy budget of Oligochaeta and its relationship with the primary production of Lake Sevan, Armenia by K. Jenderedjian Production and population dynamics of Tubifex tubifex in the profundal zone of a freshwater reservoir in N. Italy by C. Bonacina, A. Pasteris, G. Di Cola & G. Bonomi Pollution studies Superficial and hyporheic oligochaete communities as indicators of pollution and water exchange in the River Moselle, France by M. Lafont, J.C. Camus & A. Rosso 147-155 Reversal of eutrophication in four Swiss lakes: evidence from oligochaete communities by C. Lang & O. Reymond 157-162 A comparison of two tubificid oligochaete species as candidates for sublethal bioassay tests relevant to subtropical and tropical regions by M.R. Marchese & R.O. Brinkhurst 163-168 Oligochaetes and eutrophication; an experiment over four years in outdoor mesocosms by P.F.M. Verdonschot 169-183 Oligochaete communities at the mouth of the Neva and their relationship to anthropogenic impact by N.P. Finogenova 185-191 Upstream-downstream movement of macrofauna (with special reference to oligochaetes) in the River Raba below a reservoir by E. Dumnicka 193-198 A comparison of reproduction, growth and acute toxicity in two populations of Tubifex tubifex (Miller, 1774) from the North American Great Lakes and Northern Spain by T.B. Reynoldson, P. Rodriguez & M.M. Madrid 199-206 Histology and ultrastructure Morphogenesis of helical fibers in haplotaxids by M. de Eguileor, R. Valvassori, G. Lanzavecchia & A. Grimaldi 207-217 Histochemical characterization of secretions in the reproductive systems of two species of branchiobdellidans (Annelida: Clitellata): a new character for the phylogenetic matrix? by S.R. Gelder 219-227 An ultrastructural investigation of Hrabeiella Piz] & Chalupsky, 1984 (Annelida). I. Chaetae and body wall organization by E. Rota & P. Lupetti 229-239 Peripheral vascular apparatus in some aquatic oligochaetes with special references to haplotaxids by R. Valvassori, G. Lanzavecchia, M. de Eguileor, A. Grimaldi & L. Colombo 241-249 Development and physiology Osmoregulation in two aquatic oligochaetes from habitats with different salinity and comparison to other annelids by O. Generlich & O. Giere 251-261 Cinematographic documentation of enchytraeid morphology and reproductive biology by W. Westheide & M.C. Miiller 263-267 The first two cleavages in Tubifex involve distinct mechanisms to generate asymmetry in mitotic apparatus by T. Shimizu 269-276 Systematics and evolution Leeches (Oligochaeta?: Euhirudinea), their phylogeny and the evolution of life-history strate- gies by M.E. Siddall & E.M. Burreson 277-285 287-295