Bent-stem Hook-moss vs Coastal Silver-stiletto

Cratoneuron curvicaule compared with Acrosathe annulata

Key Differences

Bent-stem Hook-moss is Not Evaluated while Coastal Silver-stiletto is Least Concern.

Taxonomic Classification

Rank	Bent-stem Hook-moss	Coastal Silver-stiletto
Kingdom	Plantae (Plants)	Animalia (Animals)
Phylum	Bryophyta	Arthropoda (Arthropods)
Class	Bryopsida (Bryopsida)	Insecta (Insects)
Order	Hypnales (Hypnales)	Diptera (Diptera)
Family	Amblystegiaceae	Therevidae
Genus	Cratoneuron	Acrosathe
Species	Cratoneuron curvicaule	Acrosathe annulata

Conservation Status

Bent-stem Hook-moss

NE — Not Evaluated

Coastal Silver-stiletto

LC — Least Concern

Physical Characteristics

Attribute	Bent-stem Hook-moss	Coastal Silver-stiletto
Diet	—	—
Average Lifespan	—	—
Average Length	—	—
Average Weight	—	—

Habitat & Geographic Range

Bent-stem Hook-moss

Habitat

Native to Europe, inhabiting ecosystems characteristic of the region.

Range

Distributed across Norway and Sweden.

Coastal Silver-stiletto

Habitat

Typically found in virtually all terrestrial and freshwater habitats.

Range

Distributed across Belgium, Denmark, Norway, and Sweden.

Bent-stem Hook-moss

The Bent-stem Hook-moss (Cratoneuron curvicaule) is a species in the genus Cratoneuron. Native to Europe, inhabiting ecosystems characteristic of the region.

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.