Isopod vs small tortoiseshell

Porcellio dilatatus compared with Aglais urticae

Key Differences

• Isopod is Not Evaluated while small tortoiseshell is Near Threatened.

Taxonomic Classification

Rank	Isopod	small tortoiseshell
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum same	Arthropoda (Arthropods)	Arthropoda (Arthropods)
Class	Malacostraca (Crustaceans)	Insecta (Insects)
Order	Isopoda (Isopoda)	Lepidoptera (Butterflies & Moths)
Family	Porcellionidae	Nymphalidae (Brush-footed Butterflies)
Genus	Porcellio	Aglais
Species	Porcellio dilatatus	Aglais urticae

Evolutionary Relationship

Isopod and small tortoiseshell share a common ancestor at the Phylum level: Arthropoda. (Arthropods)

Conservation Status

Isopod

NE — Not Evaluated

small tortoiseshell

NT — Near Threatened

Physical Characteristics

Attribute	Isopod	small tortoiseshell
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Isopod

Habitat

Typically found in marine, freshwater, and terrestrial environments.

Range

Widely distributed across Europe (7 countries), North America (United States), and South America (Brazil).

small tortoiseshell

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Found across Europe (41 countries). Listed as Near Threatened, this species requires ongoing monitoring to prevent population decline.

small tortoiseshell

small tortoiseshell (Aglais urticae) is classified as Near Threatened (NT) on the IUCN Red List. Close to qualifying as threatened, with populations that may become vulnerable without conservation action.

Shared Countries

Both species can be found in 7 countries:

🇧🇪 Belgium 🇨🇿 Czech Republic 🇩🇰 Denmark 🇩🇪 Germany 🇳🇴 Norway 🇵🇹 Portugal 🇸🇪 Sweden