Rilaena triangularis
This record describes Rilaena triangularis (species). Recorded family: Phalangiidae. Recorded order: Opiliones.
Identification and Appearance
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Class
- Arachnida
- Order
- Opiliones (Harvestmen)
- Suborder
- Eupnoi
- Superfamily
- Phalangioidea
- Family
- Phalangiidae
- Genus
- Rilaena
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Geographic Range
Introduced from Europe to the Pacific Northwest. (Our voucher specimen came from Quebec, so it may have been introduced elsewhere.)
Additional species information
Species notes from the sources
Etymology: (Herbst, 1799)
About Harvestmen: the wider group
Order-level background for Opiliones, the group containing Rilaena triangularis. Species-specific details appear above.
Group overview
Opiliones (harvestmen/daddy longlegs) includes ~6,650 described species. Despite common myths, harvestmen are NOT spiders - they have a single fused body (not two segments), no venom glands, and no silk. They are completely harmless.
Ecological role of the group
Some harvestmen species practice paternal care - males guard eggs, a rare behavior among arachnids. Many species can detach their legs when caught by predators (autotomy), and the detached leg continues twitching to distract the predator.
Economic and practical significance of the group
Harvestmen have minimal economic impact. They are primarily beneficial as predators of small arthropods and as decomposers of organic matter in forest and garden ecosystems.
Recorded sources for this group: Arachnology research. Imported estimates may describe particular regions or reporting periods.
Photos of Rilaena triangularis (5)
Photo credits: Contributed by Mandy Howe; Additional contributions by Beatriz Moisset , mhedin