The name Reptantia means "those that walk", and contains those 十足目s whose primary mode of locomotion is to walk along a surface using the pereiopods rather than swimming through the water with the pleopods(英语:pleopods). Despite this, many reptants are able to propel themselves through the water, and many non-reptants can and will walk.
Systematics
The 支序图 below shows Reptantia under the sub-order 抱卵亞目 within the larger order十足目, from analysis by Wolfe et al., 2019.[2]