The thorax or pereon is smooth or slightly sculptured and sometimes spinose or rugose, with a flexion between it and the abdomen or pleon, so that from a lateral view, the front part of the animal is arched up.
The thorax or pereon is smooth or slightly sculptured and sometimes spinose or rugose. This is with a flexion between it. This is with a flexion between the abdomen or pleon. The front part of the animal is arched up. This is from a lateral view.