Table 1 Summary of the stages by histological changes in sexual induction
Test food | Ovary | Copulatory apparatus | Testis | Yolk gland | Stage of sexual induction | |
|---|---|---|---|---|---|---|
Species | Fraction | |||||
Dugesia ryukyuensis | Fr. M10 | mature oocyte | primordium | primordium | primordium | Stage 3 |
Bdellocephala brunnea | Fr. M10 | mature oocyte | primordium | spermatid | mature tissue | Stage 4 |
Bipalium nobile | Fr. M0 | mature oocyte | differentiated | elongating spermatid | mature tissue | Stage 5 |
Thysanozoon brocchii | Fr. M10 | immature oocyte | – | – | – | Stage 2 |
Ambigolimax valentianus | Fr. M0 | primordium | – | – | – | Stage 1 |