Phylum Rotifera (rotifers) 2009.pdf

Phylum Rotifera (rotifers) 2009.pdf

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Rotifera (= wheel bearers) Head bears ciliated crown called corona 1. Pseudocoelomate 2. Muscular pharynx called mastax containing trophi 3. Head, trunk & foot w/ pedal glands 4. Microscopic 5. Dioecious, some species parthenogenetic 6. Mostly freshwater; planktonic or benthic 7. Classes of Rotifera Seisonidea Epizoic on gills of a marine crustacean Paired gonads Reproduce sexually Bdelloidea Paired gonads Parthenogenetic Swimming or crawling like a leech Monogononta 1 gonad Alternating amictic (parthenogenetic) and sexual (mictic) reproduction Monogonont Life Cycle Pasted from < http://www.d.umn.edu/biology/courses/bio3701/images/rotiferlifecycle.JPG > Seison (Seisonidea) Pasted from < http://users.unimi.it/ricci/html/seison.htm
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