Linyphia triangularis is a European species of spider in the family Linyphiidae first described by Carl Alexander Clerck in his 1758 Svenska Spindlar.

[1] It has been introduced to the U.S. state of Maine, having been first reported there on 28 August 1983 at Stover Corner.

[3][4] Linyphia triangularis lives in a wide range of habitats, where it may be found among low bushes and vegetation.

It spins a horizontal sheet-web, and rests on the underside of the web for its prey.

[1][5] The prey are snared by "barrage lines" above the web, and fall onto the horizontal sheet, where they are killed by L. triangularis, but are not wrapped in silk.