European Sheetweb Spider

Pronunciation

How to pronounce Linyphia triangularis: //lɪˈnɪfiə traɪˌæŋɡjəˈlɛərɪs//

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Summary

Linyphia triangularis is a small European spider species from the family Linyphiidae, characterized by its unique abdominal markings and horizontal sheet-web construction. It is known for its role in local ecosystems as a predator of small insects and has recently been introduced to parts of North America.

Physical Characteristics

Grows up to 6 mm long. Carapace is pale brown with darker markings along the edges and down the center line. The opisthosoma has a coarsely serrate brown band against a white background, with further brown markings along the sides. Legs are greyish brown and bear many long spines.

Identification Tips

Compare the side patterning of the abdomen with Pityohyphantes species; Linyphia triangularis has distinctive tuning-fork markings on the carapace that do not extend to the posterior eye row unlike Pityohyphantes spp. A poor shot of the epigynum can also aid identification due to the distinctive spoon-shaped scape of Pityohyphantes.

Habitat

Found among low bushes and vegetation, spins a horizontal sheet-web in its habitat.

Distribution

Abundant throughout Europe; introduced to Maine, USA, first reported there on August 28, 1983, and established in at least 15 of the 16 counties, now abundant in Acadia National Park and other coastal regions of Maine.

Diet

Preys on insects caught in its web, which are killed by Linyphia triangularis but not wrapped in silk.

Ecosystem Role

Plays a role in controlling insect populations as a predator.

Similar Taxa

• Pityohyphantes

Tags

• Linyphia triangularis
• European Sheetweb Spider
• Linyphiidae
• spider