Megarcys signata

• Published in: Deep Sea Research
• Main Authors: Stewart, Kenneth W., Kondratieff, Boris C.
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2012
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Plecoptera; Perlodidae; Megarcys; Megarcys signata; Watson Lake; Whitehorse; Alaska; Yukon
• Online Access: https://doi.org/10.5281/zenodo.4762539; http://treatment.plazi.org/id/C250BC3DFFBCFF9FFE86385AFAEF43F5

Megarcys signata (Hagen 1874) (Figs. 2-11, 13, 18, 19, 25, 31, 37, 43, 50, 61, 71, 80, 85 a-b, Table 1) Distribution. Rocky Mountains, New Mexico- Nevada northward to British Columbia and Alaska. Material examined. Colorado: Boulder Co., South Boulder Creek, 3.2 km west of Tolland, 7-VII-1991, B. Kondratieff, R. Durfee, 11♂ (both macropterous and brachypterous), 6♀, 11♀ larvae, 2♂ exuviae; Middle St. Vrain Creek, FR 14 west of Peaceful Valley, 17- VII-1993, B. Kondratieff, B. Painter, 1♂, 2♀ larvae; Gunnison Co., Mosquito Creek/confluence Quartz Creek, Colorado Rd. 76 north of Pitkin, 9-VII-2008, K. Stewart, reared series: 2 reared ♂ with exuviae, 1 reared ♀ with exuvium, 8♂ larvae, 14♀ larvae; Larimer Co., outlet stream of Chasm Lake, Rocky Mountain National Park, El. 3536m, 16-VII-1994, B. Kondratieff, R. Durfee, 2 brachypterous ♂ larvae, 1♀ brachypterous larva. Montana: Gallatin Co., 5.63 km off Trail Creek Rd., 10-6-1987, B. Kondratieff, 2♂, 2♂ larvae, 3♀ larvae, 3♂ exuviae, 2♀ exuviae. Wyoming: Teton Co., Granite Creek, Granite Falls, 8-VII-2001, B. VanWieren, 1♀, 2♀ larvae. Yukon Territory: Alaska Hwy., stream crossing between Watson Lake and Whitehorse, V-1997, P. Niblett, 4♂ larvae, 3♀ larvae. Characters. Head capsule width ♂ 3.24-3.48mm, ♀ 4.14-4.20mm; pronotal width ♂ 2.64-2.76mm, ♀ 3.36- 3.90mm; body length ♂ 16.2-18.5mm, ♀ 25-26mm (Table 1). Color and pigmentation (Figs. 2, 3, 13, 19, 25, 43, 50), lacinia (Fig. 21), and dorsomesal band of erect silky white hairs (Figs. 18, 19) typical of genus and as described by Stewart & Stark (1988, 2002). Wingpads of ♂ and ♀ (Figs. 2, 25) macropterous (or brachypterous in high elevation streams). Gill number and arrangement typical of genus (Fig. 61). Submental gill length ♂ 0.36-0.48mm, ♀ 0.54- 0.60mm; anterior supracoxal gill length ♂ 0.36- 0.42mm, ♀ 0.45-0.0.60mm (shorter in high elevation Chasm Lake outlet stream in Rocky Mountain National Park) (Table 1). Legs (Figs. 6, 31) with setation typical of genus as described by Stewart & Stark (2002).Y-arms ...