brittlestar vs Brown Widow

Amphiura filiformis compared with Latrodectus geometricus

Key Differences

• brittlestar is Least Concern while Brown Widow is Not Evaluated.

Taxonomic Classification

Rank	brittlestar	Brown Widow
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Echinodermata (Echinoderms)	Arthropoda (Arthropods)
Class	Ophiuroidea (Ophiuroidea)	Arachnida (Arachnids)
Order	Amphilepidida (Amphilepidida)	Araneae (Araneae)
Family	Amphiuridae	Theridiidae
Genus	Amphiura	Latrodectus
Species	Amphiura filiformis	Latrodectus geometricus

Evolutionary Relationship

brittlestar and Brown Widow share a common ancestor at the Kingdom level: Animalia. (Animals)

Conservation Status

brittlestar

LC — Least Concern

Brown Widow

NE — Not Evaluated

Physical Characteristics

Attribute	brittlestar	Brown Widow
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

brittlestar

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Brown Widow

Habitat

Typically found in terrestrial habitats from forests to deserts.

Range

Widely distributed across Africa (South Africa), Asia (Japan), Europe (7 countries), North America (United States), and South America (Colombia, Ecuador, Peru).

brittlestar

The Brittlestar (Amphiura filiformis) is a species in the genus Amphiura. It is currently classified as Least Concern on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

Brown Widow

The Brown Widow (Latrodectus geometricus) is a species in the genus Latrodectus. Typically found in terrestrial habitats from forests to deserts. Its geographic range includes widely distributed across africa (south africa), asia (japan), europe (7 countries), north america (united states), and south america (colombia, ecuador, peru).

Shared Countries

Both species can be found in 2 countries:

🇳🇴 Norway 🇸🇪 Sweden