Petrolisthes eriomerus
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Malacostraca |
| Order: | Decapoda |
| Suborder: | Pleocyemata |
| Infraorder: | Anomura |
| Family: | Porcellanidae |
| Genus: | Petrolisthes |
| Species: | P. eriomerus
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| Binomial name | |
| Petrolisthes eriomerus | |
Petrolisthes eriomerus is a species of marine porcelain crab found in the eastern Pacific Ocean. It is commonly known as the flattop crab. It is a flattened, rounded animal, with a carapace up to 20 mm (0.8 in) across. It is a filter feeder, and also sweeps food from rocks.
- ^ Masayuki Osawa (2010). "Petrolisthes eriomerus Stimpson, 1871". World Register of Marine Species. Retrieved August 2, 2011.