Several bugs and arthropods might be said to resemble crabs in some way due to their morphology. Here are some that have “crab-like” appearances or are often associated with such a description:
Pseudoscorpions, also known as false scorpions or book scorpions, are tiny arachnids that somewhat resemble scorpions but are much smaller in size. They have a pair of large pincers (chelae) similar to those of scorpions, and a flat, often ovate body. However, unlike true scorpions, pseudoscorpions do not have a long, segmented tail tipped with a venomous stinger.
In terms of resemblance to crabs:
- Their chelae (pincers) might remind one of crab claws.
- Their general body shape, with a broad cephalothorax and abdomen, could be somewhat reminiscent of a crab.
However, their overall size (many are just a few millimeters long) and the absence of a tail mean they won’t be mistaken for crabs upon closer inspection. The resemblance is superficial, but if one were to think of a terrestrial arthropod with pincers, both crabs and pseudoscorpions (as well as true scorpions) might come to mind.
(Family: Thomisidae): These spiders get their name from their resemblance to crabs. They have a broad, flat body and legs that extend outward in a crab-like fashion. They also move sideways, much like crabs.
Pillbugs and Sowbugs
While these are crustaceans and not true bugs, they are often thought of as bugs because they are terrestrial. Some people think they have a somewhat crab-like appearance because of their segmented bodies and multiple legs.
This is a type of louse that infests human pubic hair (but can also be found in other coarse body hair). It gets its name from its crab-like appearance.
This is a large family of wasps. Some members of this family dig burrows and have a slightly crab-like appearance due to their robust body and the position of their legs.