Within the Notostraca, and even within species, there is variation in the mode of reproduction, with some populations reproducing sexually, some showing self-fertilisation of females, and some showing a mix of the two.
The frequency of males in populations is therefore highly variable.
In sexual populations, the sperm leave the male's body through simple pores, there being no penis.
The eggs are released by the female and then held in the cup-like brood pouch.
The eggs are retained by the female only for a short time before being laid, and the larvae develop directly, without passing through a metamorphosis.
Within the Notostraca, and even within species, there is variation in the mode of reproduction, with some populations reproducing sexually, some showing self-fertilisation of females, and some showing a mix of the two. The frequency of males in populations is therefore highly variable. In sexual populations, the sperm leave the male's body through simple pores, there being no penis. The eggs are released by the female and then held in the cup-like brood pouch. The eggs are retained by the female only for a short time before being laid, and the larvae develop directly, without passing through a metamorphosis.
Notostraca