blunt tellin vs Coastal Silver-stiletto

Arcopagia crassa compared with Acrosathe annulata

Key Differences

• blunt tellin is Vulnerable while Coastal Silver-stiletto is Least Concern.

Taxonomic Classification

Rank	blunt tellin	Coastal Silver-stiletto
Kingdom same	Animalia (حيوانات)	Animalia (حيوانات)
Phylum	Mollusca (رخويات)	Arthropoda (مفصليات الأرجل)
Class	Bivalvia (ذوات الصدفتين)	Insecta (حشرات)
Order	Cardiida (Cardiida)	Diptera (ذوات الجناحين)
Family	Tellinidae	Therevidae
Genus	Arcopagia	Acrosathe
Species	Arcopagia crassa	Acrosathe annulata

Evolutionary Relationship

blunt tellin and Coastal Silver-stiletto share a common ancestor at the Kingdom level: Animalia. (حيوانات)

Conservation Status

blunt tellin

VU — Vulnerable

Coastal Silver-stiletto

LC — Least Concern

Physical Characteristics

Attribute	blunt tellin	Coastal Silver-stiletto
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

blunt tellin

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Belgium, Denmark, Norway, and Sweden. Currently classified as Vulnerable on the IUCN Red List, this species faces significant conservation challenges across its range.

Coastal Silver-stiletto

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

blunt tellin

The Blunt tellin (Arcopagia crassa) is a species in the genus Arcopagia. It is currently classified as Vulnerable on the IUCN Red List. Native to Europe, inhabiting ecosystems characteristic of the region.

Coastal Silver-stiletto

Coastal silver stiletto (Acrosathe annulata) is a slender robber fly in the family Therevidae, native to northwestern Europe, including the United Kingdom, France, the Netherlands, Belgium, and Scandinavia. Adults are found on coastal sand dunes and sandy heathland, where they perch on bare sand to ambush small flying insects. Stiletto flies in the family Therevidae are characterised by a slender body, long pointed abdomen, and predatory habits; adults prey on a variety of small dipterans and other flying insects during warm, sunny periods. Larvae develop in sandy soil, where they are also predatory, feeding on other invertebrate larvae. Acrosathe annulata is a habitat specialist restricted to open, sandy coastal habitats with sparse vegetation—environments that have declined substantially across northwestern Europe due to dune stabilisation, recreational disturbance, and the cessation of traditional dune management. The IUCN lists it as Least Concern, though regional conservation bodies in the United Kingdom have flagged population declines. It is considered an indicator of high-quality coastal sand dune habitats and is monitored through national invertebrate surveys.

Shared Countries

Both species can be found in 4 countries:

🇧🇪 Belgium 🇩🇰 Denmark 🇳🇴 Norway 🇸🇪 Sweden