Nemerteans and Turbellaria (Phylum Plateyhelminthes): Comparison of Reproductive Systems Abstract Nemerteans and the Plateyhelminthes class turbellaria are very similar in appearance. But on closer investigation they are quite different in structure. If the reproductive systems are examined, it is found that they are different in many ways. The first major difference is that nemerteans are mostly dioecious and turbellaria are monoecious. Another difference is that external fertilization usually takes place in nemertean species and opposed …showed first 75 words of 1303 total…

…showed last 75 words of 1303 total…Free living larval stage. No free living larval stage. (except for a few groups such as the Muller’s larva) 5 Literature Cited Coe, W.R. 1931. A new species of nemertean (Lineus vegetus) with asexual reproduction. Zoology, 94: 54-60. Coe, W.R. 1943. Biology of nemerteans of the Atlantic coast of North America. Arts Sci, 35: 129-328. Gibson, Ray. 1982. British Nemerteans. Cambridge University Press, London. 212 pp. Pechenik, Jan. A. 1996. Biology of the Invertebrates. Wm. C. Brown Publishers, Toronto. 533 pp.