Rudolfina digitata Marshall 1991

Rudolfina digitata Marshall, 1991

Fig. 21A

In addition to the original type material, the following material was examined:

CANADA – Alberta • 1 ♀; Coleman; 24–26 Jul. 1980; S.A. Marshall leg.; DEBU • 1 ♀; Hailstone Butte, 60 km W of Nanton; 21–23 Jul. 1987; S.A. Marshall leg.; dung cup, under cow parsnip; DEBU. – British Columbia • 1 ♀; Kootenay Land District, Ainsworth, Woodbury Creek; 5 Jul. 1980; S.A. Marshall leg.; dung; DEBU • 1 ♂; Okanagan–Similkameen, Mount Kobau; 1760 m a.s.l.; 29 May–3 Jun. 1991; Blades and Maier leg.; DEBU • 1 ♂; Peace River Land District, Pink Mountain; 16 Jul. 1987; S.A. Marshall leg.; marmot dung, dwarf willow; DEBU. – Ontario • 1 ♀; Agnes River; Jul. 1994; A.P. Applejohn leg.; SP2, plot 18; DEBU.

MEXICO – México • 2 ♀♀; 3 mi. SW of Tenancingo, km 52¼; 2164 m a.s.l.; 31 Aug.–6 Sep. 1971; A. Newton leg.; oak–juniper, human dung; DEBU.

UNITED STATES OF AMERICA – New Hampshire • 1 ♂; Coos Co., 1 mi. NE of East Inlet Dam; 25 Jun.–9 Jul. 1986; D.S. Chandler leg.; F.I.T.; DEBU. – New York • 1 ♂; Greene Co., Cairo; 1 Jul. 1980; S.A. Marshall leg.; DEBU. – Wyoming • 2 ♂♂, 1 ♀; Sheridan Co., Antelope Butte Rec. Area, 20.3 km W of Burgess Jct.; 5–20 Aug. 1990; J.E. Swann leg.; along stream, pans, cow dung; DEBU • 1 ♂; Sheridan Co., Black Mountain, off Hwy 14; 5–20 Aug. 1990; J.E. Swann leg.; pine forest, pans, cow dung; DEBU • 2 ♂♂, 1 ♀; Sheridan Co., Black Mountain, off Hwy 14; 5–20 Aug. 1990; J.E. Swann leg.; pines, lupines, pans; DEBU • 1 ♂; Sheridan Co., Black Mountain, off Hwy 14; 5–20 Aug. 1990; J.E. Swann leg.; pines, pans, cow dung; DEBU.

See Marshall (1991).

Nearctic: Canada (AB, BC, YT, ON), U.S.A. (AK, CO, NH, NY, WY), Mexico (MEX).

Rudolfina digitata, the second species to be described in this originally Palaearctic genus, is widely distributed in western North America and also occurs in a few eastern North American sites, including Mount Washington, New Hampshire. Mount Washington is known to have other species with disjunct western Cordilleran and eastern Appalachian distributions (e.g., Oeneis melissa (Fabricius, 1775) (Lepidoptera: Nymphalidae)), and the apparently disjunct population of R. digitata there suggests it may have once had a more extensive range. The other New Hampshire locality is also one of two known localities for the rare monotypic sphaerocerid genus Volumosina Roháček & Marshall, 2017, otherwise known from one old growth forest in Ontario.

The male abdomen is most similar that of the Palaearctic R. zhangi.