Recent Advances in Nemertean Biology: Proceedings of the Second International Meeting on Nemertean Biology, Tjarno Marine Biological Laboratory, August 11 – 15, 1986

The nemerteans are a fascinating, common and often locally abundant group of invertebrates, yet for long have attracted the attention of only a handful of scientists. In recent years, however, increasing numbers of people have developed diverse research interests in the group with the result that our knowledge of these worms has rapidly advanced. Clearly there is a need for a regular series of international meetings where individuals working on these animals can meet to exchange ideas, review developments concerning nemertean biology and freely discuss future proposals. The first such meeting was held in Philadelphia during December 1983. Twenty-seven scientists from eight countries participated in the Second International Meeting on Nemertean Biology, held at the Tjarno Marine Biological Laboratory, Sweden, 11-15 August 1986. The meeting was divid­ ed into five sessions: two dealt with ecological studies, two with nemertean taxonomy, and the final session covered aspects of general biology. A total of 26 papers was presented; four, by N. Anadem, G. Berg, 1. Bierne, and 1.M. TurbeviIIe, were for different reasons not submitted for inclusion in this volume. Three additional presentations were made on behalf of B. Kulikova, E. N. WiIImer, and Z. Yin, all of whom were unable to participate in the meeting. Front Matter....Pages I-XII The role of hoplonemerteans in the ecology of seagrass communities....Pages 1-11 Ecological implications of the reproductive biology of symbiotic nemerteans....Pages 13-22 Diversity among nemertean egg predators of decapod crustaceans....Pages 23-30 Temporal variation in abundance of the egg predator Carcinonemertes epialti (Nemertea) and its effect on egg mortality of its host, the shore crab, Hemigrapsus oregonensis ....Pages 31-38 Impact of the nemertean Lineus viridis on its polychaete prey on an intertidal sandflat....Pages 39-46 Food and feeding behavior of the hoplonemertean Oerstedia dorsalis ....Pages 47-51 Neuroendocrine control of gonadogenesis in regenerating Lineus lacteus (Heteronemertea)....Pages 53-60 Evolutionary relationships between mono- and polystiliferous hoplonemerteans: Nipponnemertes (Cratenemertidae), a “ missing link ” genus ?....Pages 61-74 Marine relatives of terrestrial nemerteans: The genus Prosadenoporus Bürger, 1890 (Hoplonemertea)....Pages 75-86 Remarks on marine interstitial nemertines and key to the species....Pages 87-92 Polymorphism in Oerstedia dorsalis (Abilgaard, 1806) revisited....Pages 93-98 Hubrecht, Macfarlane, Jensen and Willmer: On the nature and testability of four versions of the nemertean theory of vertebrate origins....Pages 99-104 On the anatomy and taxonomy of Cerebratulus hepaticus Hubrecht, 1879 (Nemertini) from the Mediterranean (Banyuls-sur-Mer)....Pages 105-113 On the hoplonemertean Sagaminemertes nagaiensis (Iwata, 1957), with consideration of its systematics....Pages 115-124 Notogaeanemertes folzae gen. n., sp. n., an additional ecologically restricted hoplonemertean from New Zealand....Pages 125-133 Heavy metals in marine nemerteans....Pages 135-143 Pyridine alkaloid distribution in the hoplonemertines....Pages 145-151 Ecdysteroids in nemerteans: Presence and physiological role ....Pages 153-160 Water and solute regulation in Procephalothrix spiralis Coe and Clitellio arenarius (Müller) III. Long-term acclimation to diluted seawaters and effect of putative neuroendocrine structures....Pages 161-173 No direct contact between the excretory system and the circulatory system in Prostomatella arenicola Friedrich (Hoplonemertini)....Pages 175-181 The colour Pattern of Lineus atrocaeruleus (Nemertea)....Pages 183-189 Oxytalan fibres in the epidermal basement membrane of Lineus atrocaeruleus (Nemertea)....Pages 191-197 Back Matter....Pages 199-207 The nemerteans are a fascinating, common and often locally abundant group of invertebrates, yet for long have attracted the attention of only a handful of scientists. In recent years, however, increasing numbers of people have developed diverse research interests in the group with the result that our knowledge of these worms has rapidly advanced. Clearly there is a need for a regular series of international meetings where individuals working on these animals can meet to exchange ideas, review developments concerning nemertean biology and freely discuss future proposals. The first such meeting was held in Philadelphia during December 1983. Twenty-seven scientists from eight countries participated in the Second International Meeting on Nemertean Biology, held at the Tjarno Marine Biological Laboratory, Sweden, 11-15 August 1986. The meeting was dividƯ ed into five sessions: two dealt with ecological studies, two with nemertean taxonomy, and the final session covered aspects of general biology. A total of 26 papers was presented; four, by N. Anadem, G. Berg, 1. Bierne, and 1.M. TurbeviIIe, were for different reasons not submitted for inclusion in this volume. Three additional presentations were made on behalf of B. Kulikova, E.N. WiIImer, and Z. Yin, all of whom were unable to participate in the meeting