Nemerteans and Plateyhelminthes
Title: Nemerteans and Plateyhelminthes
Category: Science & Technology | Words: 1341 | Pages: 5.7 (approximately 235 words/page)
Nemerteans and Plateyhelminthes
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 …
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showed last 75 words of 1341 total…female gonopores.
Free living larval stage. No free living larval stage. (except for a few groups such as the Muller’s larva)
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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.
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