[Evolution of the Y organs in certain Sphaeromatidae (Crustacea, Isopoda, Flagellifera)].
After having completed their puberty (terminal) molt, males of Sphaeroma serratum, Sphaeroma hookeri and Cymodoce truncata present a degeneration of their Y organs. The degenerative process lasts 1 to 1,5 months in reared animals: it results in a reducing length of Y organs, while nucleus become less numerous and cellular fragments appear. On the contrary, in females of these species, Y organs seem to remain up to death. These facts are perhaps a general characteristic of the family Sphaeromatidae.
D000367:Age Factors; D000818:Animals; D003445:Crustacea / Q000033:anatomy & histology* / Q000254:growth & development / Q000502:physiology; D008297:Male; D012737:Sex Factors
Evolution des organes Y chez certains Sphaeromatidae (Crustacea, Isopoda, Flabellifera)