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- Castro-Vazquez, Alfredo, et al. Show all 4 Authors
- Invertebrate biology 2009 v.128 no.3 pp. 223-231
- Annelida; Pomacea canaliculata; chromatin; evolution; flagellum; head; snails; spermatozoa; spermiogenesis
- ... Pomacea canaliculata is an internally fertilizing gastropod that produces, besides fertilizing sperm (=eusperm), a large number of unfertile sperm (=parasperm) that have no chromatin, are fusiform, and have three to five flagella. Here, we report that this snail also produces another type of parasperm, which results from a peculiar spermiogenesis including an anterior cytoplasmic migration. The ma ...