Sperm Formation in Archaeomysis kokuboi li (Mysidae, Crustacea)
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The development of sperm formation in the seminal vesicles of <I>Archaeomysis kokuboi</I> Ii (Mysidacea, Gastrosaccinae) is described on the materials collected from the sandy shore at Nesaki-cho Hakodate, Hokkaido from June to November in 1997. The malformed sperms with bifurcate tail were observed liberating from the seminal vesicle of a male obtained in late November. The metaphase nuclei in the seminal vesicles proved to have chromosome number of 2n=40 at mitosis, and n=20 at Meiosis I. Metaphase nuclei at Meiosis I in the seminal vesicles from a male obtained in late November showed usually to have one heterogeneous chromosome which behaves isolately from the others.
CYTOLOGIA 64(1), 51-54, 1999-03
Japan Mendel Society, International Society of Cytology