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Species Armadillidium vulgare - Common Pill Bug

Pillbug - Armadillidium vulgare Pillbug - Armadillidium vulgare Isopod of some type.. - Armadillidium vulgare Isopoda - Armadillidium vulgare Armadillidium - Armadillidium vulgare Armadillidiidae? - Armadillidium vulgare pillbug - Armadillidium vulgare porcellio scaber? - Armadillidium vulgare
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Crustacea (Crustaceans)
Class Malacostraca (Malacostracans)
Superorder Peracarida (Peracarida (Amphipods and Isopods))
Order Isopoda (Isopods)
Suborder Oniscidea (Woodlice)
Infraorder Holoverticata
No Taxon (Orthogonopoda)
No Taxon (Crinocheta)
Family Armadillidiidae (Pillbugs)
Genus Armadillidium
Species vulgare (Common Pill Bug)
Other Common Names
Common Pill Woodlouse, Roly-Poly, Doodle Bug, Potato Bug, Carpenter
Synonyms and other taxonomic changes
Armadillidium affine
Armadillidium armeniense
Armadillidium brevicaudatum
Armadillidium cinereum Zenker
Armadillidium commutattum
Armadillidium decipiens
Armadillidium marmoreum
Armadillidium nitidulum
Armadillidium oliveti
Armadillidium pilulare Stuxberg
Armadillidium schellenbergi
Armadillidium sorattinum
Armadillidium subdentatum
Armadillidium triviale
Armadillidium variegatum
Armadillo ater
Armadillo convexus
Armadillo marmoreus
Armadillo pilularis Say
Armadillo pustulatus
Armadillo trivialis
Armadillo variegatus
Armadillo vulgare
Explanation of Names
Armadillidium vulgare Latreille, 1804
Some identification marks mentioned by Ferenc Vilisics in his comment on this picture:

the trapezoidal shape of the telson
coloration (dark grey color with yellow patches), margins are never white
the head has no significant middle lobe (compared with e.g. A. nasatum).

Additional information is available at Discover Life.
An introduced species widely distributed in our area
Humid places under stones, bricks, or logs.
Introduced worldwide from Europe.
It has been shown to modify the top soil layer (increased pH, P, K and NO3 - in the mineral layer and increased removal of C from leaf litter layer).
Internet References
Florida Entomological Society. Frouz et al. Effects of the Exotic Crustacean, Armadillidium vulgare (Isopoda), and Other Macrofauna on Organic Matter Dynamics in Soil Microcosms in a Hardwood Forest in Central Florida