Blackthorn Rust vs Coastal Silver-stiletto

Tranzschelia pruni-spinosae compared with Acrosathe annulata

Key Differences

Blackthorn Rust is Not Evaluated while Coastal Silver-stiletto is Least Concern.

Taxonomic Classification

Rank	Blackthorn Rust	Coastal Silver-stiletto
Kingdom	Fungi (Fungi)	Animalia (Animals)
Phylum	Basidiomycota (Club Fungi)	Arthropoda (Arthropods)
Class	Pucciniomycetes (Pucciniomycetes)	Insecta (Insects)
Order	Pucciniales (Pucciniales)	Diptera (Diptera)
Family	Tranzscheliaceae	Therevidae
Genus	Tranzschelia	Acrosathe
Species	Tranzschelia pruni-spinosae	Acrosathe annulata

Conservation Status

Blackthorn Rust

NE — Not Evaluated

Coastal Silver-stiletto

LC — Least Concern

Physical Characteristics

Attribute	Blackthorn Rust	Coastal Silver-stiletto
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Blackthorn Rust

Habitat

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

Range

Found across Asia (Taiwan) and Europe (5 countries).

Coastal Silver-stiletto

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Blackthorn Rust

The Blackthorn Rust (Tranzschelia pruni-spinosae) is a species in the genus Tranzschelia. Found across Asia (Taiwan) and Europe (5 countries).

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.