Advances in the Biology of Turbellarians and Related Platyhelminthes: Proceedings of the Fourth International Symposium on the Turbellaria held at Fredericton, New Brunswick, Canada, August 5–10, 1984

Front Matter....Pages I-XVII
Comments on a phylogenetic system of the Platyhelminthes....Pages 1-12
Is the Turbellaria polyphyletic....Pages 13-21
The major parasitic platyhelminth classes — progressive or regressive evolution....Pages 23-29
Initial morphological diversity as a criterion in deciphering turbellarian phylogen....Pages 31-33
Asexual reproduction and the turbellarian archetype....Pages 35-45
Ultrastructure of the frontal organ in Convoluta and Macrostomum spp.: significance for models of the turbellarian archetype....Pages 47-52
The phylogenetic significance of sperm morphology in the Platyhelminthes....Pages 53-58
Phylogenetic relationships of the Temnocephaloidea (Platyhelminthes)....Pages 59-67
An ultrastructural and cytochemical study of the digestive system in Oxyposthia praedator (Turbellaria, Acoela)....Pages 69-70
Frontal organs in the Acoelomorpha (Turbellaria): Ultrastructure and phylogenetic significance....Pages 71-78
On the evolution of central nervous systems: Implications from polyclad turbellarian neurobiology....Pages 79-87
Comparative characterization of the nervous system of the Turbellaria....Pages 89-92
Neuropeptides in free-living and parasitic flatworms (Platyhelminthes). An immunocytochemical study....Pages 93-99
Aspects of photoreceptor structure and phototactic behavior in Platyhelminthes, with particular reference to the symbiotic turbellarian Paravortex ....Pages 101-104
Embryology of the Turbellaria and its phylogenetic significance....Pages 105-115
Experimental evidence for the origins of determinative development in the polyclad turbellarians....Pages 117-119
Electron microscopic study of larval eye development in Turbellaria Polycladid....Pages 121-126
Eggshell formation in polyclads (Turbellaria)....Pages 127-135
Fine-structural characteristics of female and male germ cells in Proseriata Otoplanidae (Platyhelminthes)....Pages 137-144
Ultrastructural features of oogenesis in some marine neoophoran turbellarians....Pages 145-150
Ultrastructural investigations on the differentiation of genital hard structures in free-living platyhelminths and their phylogenetic significance....Pages 151-156
Ultrastructure of the copulatory stylet and accessory spines in Haplopharynx quadristimu- lus (Turbellaria)....Pages 157-163
Comparative ultrastructure of copulatory organs having a stylet in the Proseriata (Turbellaria)....Pages 165-173
Development of the reproductive apparatus of the land planarian Rhynchodemus sylvaticus (Turbellaria: Tricladida) and its significance for classification in the genus....Pages 175-180
Cell migration and differentiation during wound healing and regeneration in Microstomum lineare (Turbellaria)....Pages 181-188
Physiological regeneration of the digestive parenchyma in Convoluta convoluta and Oxyposthia praedator (Turbellaria, Acoela)....Pages 189-193
Asexual reproduction, regeneration, and somatic embryogenesis in the planarian Dugesia tigrina (Turbellaria)....Pages 195-200
Positional information and gonadal differentiation in the planarian Dugesia lugubris (Turbellaria)....Pages 201-206
On the origin of neoblasts in freshwater planarians (Turbellaria)....Pages 207-216
Ultrastructural observations on gastrodermal regeneration in the planarian Dugesia japonica (Turbellaria)....Pages 217-222
Protein phosphorylation and the role of Ca 2+ in planarian turbellarian regeneratio....Pages 223-227
Biology of long slender land planarians (Turbellaria) in Tokyo and environs....Pages 229-232
Karyology of a marine population of Gyratrix hermaphroditus (Turbellaria, Rhab- docoela) and chromosomal evolution in this species complex....Pages 233-238
Chromosomal evolution in marine triclads and polyclads (Turbellaria)....Pages 239-242
Variation in karyotypes of Dugesia japonica japonica (Turbellaria) from Ôsaka Prefecture, Central Japan....Pages 243-249
On the karyology of Dugesia gonocephala s.l. (Turbellaria, Tricladida) from Montpellier, France....Pages 251-256
Taxonomic studies on marine triclads (Turbellaria, Tricladida, Maricola)....Pages 257-262
Ontogenetic patterns and phylogenetic trends in freshwater flatworms (Tricladida); constraint or selection?....Pages 263-272
Reproductive ecology of Dendrocoelum lacteum (Turbellaria) in a rapid stream in southern Sweden and comparisons with a lake population....Pages 273-277
Salinity-temperature tolerance of two closely related triclad species, Dugesia lugubris and D. polychroa (Turbellaria), in relation to their distribution in The Netherlands....Pages 279-286
Distribution, abundance, and size of rhabdoids in Dugesia polychroa (Turbellaria: Tricladida)....Pages 287-293
The importance of turbellarians in the marine meiobenthos: a review....Pages 295-303
An overview of surface specializations in the digenetic trematodes....Pages 305-310
Occurrence of symbiotic turbellarians in the oyster, Crassostrea virginica ....Pages 311-315
History of the study of Turbellaria in China. Part 1: Ages of Materia Medica and of early expeditions by westerners....Pages 317-322
Back Matter....Pages 323-357