MASISTYLUM Brauer & Bergenstamm, 1893: 37 (also 1894: 125). Type species: Pachystylum arcuatum Mik, 1863, by monotypy [Palearctic].
stenommatum Wood, 1974.– British Columbia (Wood, 1974a), Yukon (CNC).
– Masistylum stenommatum Wood, 1974a: 178. Type data: holotype female (CNC). Type locality: Canada, British Columbia, Mile 392 of Alaska Highway, Summit Lake, 4700 feet.