| Pisa armata | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Malacostraca |
| Order: | Decapoda |
| Suborder: | Pleocyemata |
| Infraorder: | Brachyura |
| Family: | Epialtidae |
| Genus: | Pisa |
| Species: | P. armata |
| Binomial name | |
| Pisa armata (Latreille, 1803) | |
| Synonyms [1] | |
| |
Pisa armata is a species of crab from the eastern Atlantic Ocean.
Pisa armata grows to a length of 40 millimetres (1.6 in). [2] Its carapace is roughly triangular, with two prominent rostral spines, which are parallel in males, but divergent in females. [2] The carapace is brown, but is often covered in seaweed, sponges or anemones. [2]
Pisa armata is found in the eastern Atlantic Ocean from around the Isle of Man as far south as Angola, as well as in parts of the Mediterranean Sea. [3] It lives at depths of 1–108 metres (3 ft 3 in – 354 ft 4 in). [3]
Pisa armata is parasitised by a rhizocephalan barnacle. Although initially considered to be the same species that attacks other crabs such as Carcinus maenas , experiments in the 1960s demonstrated that the two were different species, Sacculina carcini on C. maenas, and Sacculina gibbsi on P. armata. [4]