Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
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Order Isopoda - Isopods

Phylum Arthropoda - Arthropods
Subphylum Crustacea - Crustaceans
Class Malacostraca - Malacostracans
Superorder Peracarida - Marsupial Crustaceans
Order Isopoda - Isopods

Suborder Asellota - Asellotes
Superfamily Gnathostenetroidoidea
Superfamily Stenetrioidea
Superfamily Janiroidea
Family Janiridae
Genus Jaera
No Taxon albifrons complex
Species albifrons - Jaera albifrons
Genus Carpias
Species minutus - Carpias minutus
Superfamily Aselloidea - Waterslaters
Family Stenasellidae
Family Asellidae - Common Waterslaters
Genus Caecidotea
No Taxon hobbsi group
Species kenki - Potamic Springslater
No Taxon forbesi group
Species racovitzai - Caecidotea racovitzai
Subspecies australis - Caecidotea racovitzai australis 0
Subspecies racovitzai - Caecidotea racovitzai racovitzai
Species communis - Caecidotea communis
Species tomalensis - Caecidotea tomalensis
Genus Lirceolus
Genus Asellus
No Taxon Arctasellus
No Taxon Asellus
Genus Lirceus
Suborder Microcerberidea
No Taxon Scutocoxifera
Suborder Cymothoida - Predatory and Parasitic Isopods
Family Cirolanidae
Genus Bathynomus - Giant Isopods
Genus Cirolanides
Species texensis - Cirolanides texensis
Genus Excirolana
Species chiltoni - Excirolana chiltoni
Genus Cirolana
Family Aegidae
Infraorder Epicaridea - Crustacean-parasitic Isopods
Family Cymothoidae
Genus Anilocra
Species acuta - Anilocra acuta
Genus Elthusa
Species californica - Elthusa californica
Suborder Oniscidea - Woodlice
Infraorder Holoverticata
No Taxon Orthogonopoda
No Taxon Crinocheta
Family Alloniscidae
Genus Alloniscus
Species mirabilis - Alloniscus mirabilis
Species perconvexus - Alloniscus perconvexus
Family Armadillidae - Tropical and Southern Pillbugs
Genus Cubaris
Species benitensis - Cubaris benitensis
Species murina - Little Sea Pillbug
Genus Gabunillo - Gabunillo 0
Genus Venezillo
Species microphthalmus - Venezillo microphthalmus
Species arizonicus - Venezillo arizonicus
Species parvus - Venezillo parvus
Species pisum - Venezillo pisum 0
Family Armadillidiidae - European Pillbugs
Genus Armadillidium
Species nasatum - Nosy Pillbug
Species vulgare - Common Pillbug
Family Cylisticidae
Genus Cylisticus
Species convexus - Curly Woodlouse
Family Detonidae
Genus Detonella
Species papillicornis - Detonella papillicornis
Genus Armadilloniscus
Species coronacapitalis - Armadilloniscus coronacapitalis
Species holmesi - Armadilloniscus holmesi
Species lindahli - Armadilloniscus lindahli
Species ellipticus - Armadilloniscus ellipticus
Family Eubelidae
Genus Elumoides
Family Oniscidae - Sowbugs
Genus Oniscus
Species asellus - European Sowbug
Family Philosciidae
Genus Atlantoscia
Species floridana - Florida Fast Woodlouse
Genus Floridoscia
Species fusca - Florida Rufous Woodlouse
Genus Chaetophiloscia
Species sicula - Chaetophiloscia sicula
Genus Littorophiloscia
Species richardsonae - Littorophiloscia richardsonae
Species vittata - Littorophiloscia vittata
Genus Philoscia
Species muscorum - Philoscia muscorum
Family Platyarthridae
Genus Niambia
Species capensis - Niambia capensis
Genus Platyarthrus - Ant Woodlice
Species aiasensis - Platyarthrus aiasensis
Species hoffmannseggii - Ant woodlouse
Family Porcellionidae
Genus Acaeroplastes
Genus Porcellio
Species dilatatus - Giant Canyon Woodlouse
Species laevis - Swift Woodlouse
Species scaber - Common Rough Woodlouse
Species spinicornis - Brickwork Woodlouse
Genus Porcellionides
Species floria - Porcellionides floria
Species pruinosus - Plum Woodlouse
Species virgatus - Porcellionides virgatus
Genus Proporcellio
Species vulcanius - Proporcellio vulcanius
Family Trachelipodidae
Genus Trachelipus
Species rathkii - Rathke's Woodlouse
Genus Nagurus
Species cristatus - Dwarf Gray Striped Isopod
Family Rhyscotidae
Genus Rhyscotus
Species texensis - Rhyscotus texensis
No Taxon Synocheta
Family Styloniscidae
Genus Cordioniscus
Species stebbingi - Cordioniscus stebbingi
Family Trichoniscidae
Genus Androniscus
Species dentiger - Androniscus dentiger
Genus Brackenridgia
Species heroldi - Brackenridgia heroldi
Genus Haplophthalmus
Species danicus - Spurred Ridgeback
Genus Hyloniscus
Species riparius - Hyloniscus riparius
Genus Miktoniscus
Species spinosus - Miktoniscus spinosus 0
Species medcofi - Miktoniscus medcofi
Genus Trichoniscus
Species pygmaeus - Trichoniscus pygmaeus
No Taxon Tylida
Family Tylidae
Genus Tylos
Species punctatus - Tylos punctatus
Species niveus - Tylos niveus
Infraorder Diplocheta
Family Ligiidae - Seaslaters and Rockslaters
Genus Ligia - Seaslaters
Species baudiniana - Ligia baudiniana
Species exotica - Wharf Roach
Species occidentalis - Western Seaslater
Species oceanica - European Seaslater
Species pallasii - Ligia pallasii
Genus Ligidium
Species blueridgensis - Ligidium blueridgensis
Species elrodii - Ligidium elrodii
Species gracile - Ligidium gracile
Species kofoidi - Ligidium kofoidi
Species lapetum - Ligidium lapetum
Species latum - Ligidium latum
Suborder Valvifera - Valve-tailed Isopods
Family Chaetiliidae
Genus Chiridotea
Species coeca - sand isopod
Genus Saduria
Species entomon - Saduria entomon
Family Idoteidae
Genus Idotea
Species urotoma - Idotea urotoma
Species phosphorea - Idotea phosphorea
Species metallica - Idotea metallica
Species balthica - Idotea balthica
Genus Pentidotea
Species aculeata - Pentidotea aculeata
Species montereyensis - Pentidotea montereyensis
Species resecata - Eelgrass Isopod
Species wosnesenskii - Rockweed Isopod
Suborder Sphaeromatidea - Seapills and allies
Superfamily Seroloidea
Superfamily Sphaeromatoidea - Seapills
Family Sphaeromatidae - Typical Seapills
Genus Cassidinidea
Species ovalis - Cassidinidea ovalis
Genus Dynamenella
Genus Exosphaeroma
Species inornata - Exosphaeroma inornata
Species diminutum - "Exosphaeroma" diminutum
Genus Gnorimosphaeroma
Species noblei - Gnorimosphaeroma noblei
Species oregonense - Gnorimosphaeroma oregonense
Genus Paracerceis
Genus Sphaeroma
Species papillae - Sphaeroma papillae
Species quadridentatum - Sphaeroma quadridentatum
Genus Thermosphaeroma - Spring-Seapills
Species thermophilum - Socorro Isopod
Family Tecticipitidae
Family Ancinidae
Suborder Limnoriidea - Gribbles and Allies