Blackhead worm vs brittlestar

Aporrectodea longa compared with Amphiura filiformis

Key Differences

• Blackhead worm is Not Evaluated while brittlestar is Least Concern.

Taxonomic Classification

Rank	Blackhead worm	brittlestar
Kingdom same	Animalia (Animals)	Animalia (Animals)
Phylum	Annelida (Segmented Worms)	Echinodermata (Echinoderms)
Class	Clitellata (Clitellata)	Ophiuroidea (Ophiuroidea)
Order	Crassiclitellata (Crassiclitellata)	Amphilepidida (Amphilepidida)
Family	Lumbricidae	Amphiuridae
Genus	Aporrectodea	Amphiura
Species	Aporrectodea longa	Amphiura filiformis

Evolutionary Relationship

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

Conservation Status

Blackhead worm

NE — Not Evaluated

brittlestar

LC — Least Concern

Physical Characteristics

Attribute	Blackhead worm	brittlestar
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blackhead worm

Habitat

Native to Europe and North America, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, Sweden, and United States.

brittlestar

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Denmark, Norway, and Sweden.

Blackhead worm

The Blackhead worm (Aporrectodea longa) is a species in the genus Aporrectodea. Native to Europe and North America, inhabiting ecosystems characteristic of the region. Distributed across Belgium, Denmark, Norway, Sweden, and United States.

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.

Shared Countries

Both species can be found in 3 countries:

🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden