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Upcoming Events

National Moth Week photos of insects and people. Here's how to add your images.

Photos of insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Photos of insects and people from the 2011 gathering in Iowa


Order Isopoda - Isopods

Bug - Porcellionides pruinosus Rockweed Isopod - Pentidotea wosnesenskii Woodlouse - Atlantoscia floridana Crustacean  Idotea wosnesenskii - Pentidotea wosnesenskii Cylisticus convexus Woodlouse - Porcellionides European Sowbug? - Oniscus asellus Woodlice - Armadillidium vulgare
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Crustacea (Crustaceans)
Class Malacostraca (Malacostracans)
Superorder Peracarida (Peracarida (Amphipods and Isopods))
Order Isopoda (Isopods)
Other Common Names
cressbug, pillbug, sowbug, woodlouse, rock slater, roly-poly
>10,200 spp. worldwide(1)
2 to >300 mm (Bathynomus, a deep sea genus)
key to OH spp. in(2)
Worldwide, from the deep sea to terrestrial habitats.
Pillbugs and sowbugs, being crustaceans, breathe by means of gills. This is why they need moisture, but they will drown if submerged
Internet References
Coastal Isopods of California (Brusca et al. 2001)
Taxon profile (Brusca 1997)