By Ralph O. Brinkhurst (auth.), Giuliano Bonomi, Christer Erséus (eds.)
At the 1st overseas Symposium on Aquatic Oligochaete Biology in Sidney, B. C. , the recommendation used to be made to carry the second one in Pallanza, on Lake Maggiore, on the C. N. R. -Istituto Italiano di Idrobiologia. even as it was once determined that there may be a symposium each 3rd 12 months. The association of the symposium was once made significantly more straightforward through the Senior Editor's having been in own touch with numerous Russian colleagues (courtesy of a type invitation from the U. S. S. R. Academy of Sciences), the 'Hamburg crew' and the Junior Editor. Correspondence with a number of scholars of Oligochaeta additionally supplied many helpful feedback. the second one overseas Symposium on Aquatic Oligochaete Biology was once consequently held in Pallanza in overdue September 1982 and was once attended via fifty three scientists from sixteen nations in Europe, North the US, Asia and Australia. No evaluation papers have been officially invited as this had already been performed on the first symposium: all of the papers have been therefore disbursed an analogous time for oral presentation. those lawsuits include all papers Hrabe and Slepukhina, that have been given in absentia, because it provided on the symposium, together with these by way of was once most unlikely for the authors to hitch the crowd. the most subject matters have been taxonomy and evolution of Oligo chaeta, life-cyle and inhabitants experiences, the position of Oligo chaeta in assessing water pollutants, physiolog ical stories, neighborhood and distribution reviews. exact taxonomic workshops came about within the evenings.
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Extra resources for Aquatic Oligochaeta: Proceedings of the Second International Symposium on Aquatic Obligochaete Biology, held in Pallanza, Italy, September 21–24, 1982
Timm for the many exchanges of correspondence in regard to this and other issues, and trust I have quoted his views accurately in the following account. IV Fig. I). The segmental position of the gonads varies but this is a secondary condition, not necessarily derived from a multigonadal ancestor. Eleven of the 18 living haplotaxid species have all eight gonads whereas this condition is only found in two relatively primitive species of the Lumbricida. The male and female gonoducts of the earliest oligochaete may be supposed to have been very similar, just as they are in the haplotaxids.
III, is evidence that at least one living haplotaxid shows some signs of the development of the opisthopore condition. The direct ancestor of the opisthopores would have had a different gonadal reduction sequence though as the ovary of H. IV as it is in the Lumbricida. Traces of a prosopore state can be seen in haplotaxids like H. smithii, H. hologynous, and H. I1 if not in G.!. While many college texts refer to the similarity of oligochaete and polychaete setae, there has been very little careful comparison of them.
Can. J. Zoo!. 57: 1553-1569. Brinkhurst, R. O. & W. Fulton, 1979. Some aquatic Oligochaeta from Tasmania. Rec. Queen Vict. Mus. 64: \-8. Brinkhurst, R. O. & B. G. M. Jamieson, 1971. Aquatic Oligochaeta of the world. Oliver & Boyd, Edinburgh. 860 pp. Cook, D. G. & J. K. Hiltunen, 1975. Phallodrilus hallae, a new tubificid oligochaete from the St. Lawrence Great Lakes. Can. J. Zoo!. 53: 934-941. , 1979. Taxonomic revision of the marine genus Bathydrilus Cook and Macroseta Erseus (Oligochaeta, Tubificidae), with descriptions of six new species and SUbspecies.