The gonopod is extended beyond the coxae of adjacent legs and is hemispherical.
2.
The first gonopod is strongly curved, with a swollen and strongly hooked base.
3.
Form I male gonopod characteristics or collection location are required for species level identification.
4.
The first gonopod ( appendages modified into sexual organs ) of the male is stem-like.
5.
The first gonopod ( appendages modified into sexual organs ) of the male is crooked sideways with a bulging tip.
6.
The genus is very distinctive in the form of the gonopod, which is typically coiled through at least a full circle.
7.
In the former, the first gonopod has a complex hoof-shaped tip, while in the latter they are simple and curved.
8.
In the former, the first gonopod has a complex, hoof-shaped tip, while in the latter they are simple and curved.
9.
The separated gonopod remains attached to the female's epigynum for approximately 4 hours and continues to function independently, serving as a mating plug.
10.
However, " P . texana " only occurs in the Gulf of Mexico, and can be distinguished from " P . sayi " by the form of the fifth pereiopod ( last walking leg ) and that of the male gonopod.
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