Observations on the embryonic development of Thenus orientalis

The embryonic development of 7bans orientalis can be devided into nine stages: cleavage, blastula, gastrula, egg-nauplius, embryo with 5 pairs of appendage rudiments, embryo with thoracic appendages (or appendage rudiments, embryo with compound eye pigments forming, embryo nearly ready to hatch and the stage of hatch. The size of pigmental spots of embryonic compound eyes increase with the embryonic development. The lst maxilliped can' t be observed during the period of embryonic development in T. orientalis.