Moselia infuscata (Claassen)

Stark, Bill P. & Harrison, Audrey B., 2016, The Banded-Wing Moselia (Plecoptera: Leuctridae) Revisited, Illiesia 12 (9), pp. 42-58 : 51-57

Moselia infuscata (Claassen)

Hairy Needlefly

( Figs. 1 , 41 , 43-52 )

http://lsid.speciesfile.org/urn:lsid: Plecoptera .speciesfile.org: TaxonName:4315

Leuctra infuscata Claassen, 1923:262 .

Holotype ♂ (Cornell University Collection), Seattle , Washington ( Fig. 13 holotype ♂, Fig. 14 ♀)

Leuctra infuscata: Needham & Claassen, 1925:230 , (Plate 43, Figs. 3, 5 holotype ♂, Fig 4 ♀)

Leuctra (Moselia) infuscata: Ricker, 1943:81

Moselia infuscata: Illies, 1966:112

Material examined. CALIFORNIA: Sierra Co., Big Spring, Hwy 49, near Bassetts, 21 June 2009, B. Stark, A.B. Harrison, K.C. Nye, 5♂, 2♀ ( BPSC), 1♂ SEM . OREGON: Benton Co., Parker Creek , Mary’s Peak, 1.5 mile W FR 3010, 18 May 1982, B. Stark, D. Ziegler, 5♂, 3♀ ( BPSC), 1♂ SEM. Same site, 26 June 1985, B. Stark, 10♂, 5♀ ( BPSC), 1♂ SEM. Yew Creek , Mary’s Peak Rd, 1 June 2000, B. Stark, I. Sivec, M.C. Zúñiga, 2♂ ( BPSC), 1♂ SEM. Clackamas Co., Still Creek Campground , off Hwy 26, 45° 18.024’ N, 121° 44.101’ W, 2 June 2000, B. Stark, I. Sivec, M.C. Zúñiga, 1 ♂ ( BPSC). Same site, 17 May 2014, B. Stark, A.B. Harrison, 14♂, 7♀ ( BPSC), 1♂ SEM. Deschutes Co. , Tumalo Falls springs, 11 June 2004, B. Stark, R.W. Baumann , 32♂, 12♀ ( BPSC) , 4♂ SEM. Black Pine Spring, off FR 16, 8 miles SW Sisters , 11 June 2004, B. Stark , R.W. Baumann , 16♂, 15♀ ( BPSC) , 1♂, 1♀ SEM. Douglas Co., Muir Creek, Hwy 230, 19 May 1982, B. Stark, D. Ziegler, 2♂ ( BPSC) , 1♂ SEM. Jackson Co., Whiskey Springs, Whiskey Springs Campground , W of Mt. McLoughlin, 9 June 2004, B. Stark , R.W. Baumann , 15♂, 11♀ ( BPSC) , 1♂, 1♀ SEM. Jefferson Co., Headwater spring of Metolius River , 12 June 2004, B. Stark , R.W. Baumann , 1♂ ( BPSC) , 1♂ SEM. Klamath Co., springs on Seven Mile Creek , 12 June 1964, J. Schuh, 71♂, 10♀ ( BYUC) , 2♂ SEM. Lane Co., Alder Springs, Alder Springs Campground , Hwy 242, 12 June 2004, B. Stark , R.W. Baumann , 30♂, 7♀ ( BPSC) , 1♂ SEM. Linn Co., small tributary North Santiam River, 0.5 miles W Bruno Mountain Rd, Hwy 22, 44° 41.439’ N, 121° 59.667’ W, 18 May 2014, B. Stark, 3♂, 7♀ ( BPSC) , 2♂ SEM. Willis Creek seeps, Marion Forks Rd , FR 2255, 44° 35.902’ N, 121° 56.031’ W, 18 May 2014, B. Stark, 11♂, 13♀ ( BPSC) , 1♂ SEM. Multnomah Co., Wahkeena Creek , 29 March 1984, G . R. Fiala , 4♂ ( BYUC) , 1♂ ( SEM) . WASHINGTON: Chelan Co., seep at White Pine Campground, Hwy 2, 14 June 2004, B. Stark , R.W. Baumann , 2♂, 5♀ ( BPSC) , 1♂, 1♀ SEM. Minotaur Creek , 11 mi W Wenatchee Lake, 19 June 1976, J . R. Wood , 4♂, 1♀ ( BYUC) , 1♂ SEM. Clallam Co., Unnamed creek, Hurricane Ridge , Heart of Hills Rd , 47.98729 N, 123.43860 W, 28 May 2014, J.J. Lee, 16♂, 8♀ ( JJLC) , 2♂ SEM. Cowlitz Co., Alder Creek, tributary North Fork Toutle River , 24 March 1987, G . R. Fiala , 4♂, 1♀ ( BYUC) , 2♂ SEM. Kittitas Co., creek entering Keechelus Lake, Hwy 10, 1 mile S Gold Creek , 7 June 1969 , R.W. Baumann , 1♂ ( BYUC) , 1♂ SEM. Okanogan Co., Doe Creek , FR 150, 16 miles N Winthrop, 19 June 1995, G. MacKenzie, 1♂, 2♀ ( BYUC) , 1♂ SEM. Pierce Co., St. Andrews Creek, Westside Rd , Mt. Rainier National Park , 28 June 1985, B. Stark, 1♂ ( BPSC) , 1♂ SEM. Same site, 13 July 1979, B. Stark, K.W. Stewart, 1♂ ( BPSC) , 1♂ SEM. Mt. Rainier National Park , 29 June 1981, K.W. Stewart, W.D. Shepard, 1♂, 4♀ ( BYUC) , 1♂ SEM. Mt. Rainier National Park , 17 June 2004, B.C. Kondratieff, Schmidt, 1♂ ( CSUC) , 1♂ SEM. Snohomish Co., unnamed creek, 1.6 miles off FR 23 on FR 29, 11 miles SE Darrington , 9 June 1994, G. MacKenzie, 1♂, 4♀ ( BYUC) , 1♂ SEM. Whatcom Co., Boulder Creek, Maple Falls , 17 April 1968, 7♂, 4♀ ( BYUC) , 2♂ SEM. Heislers Creek, North Fork Rd , 28 April 1995, G. MacKenzie, 6♂, 3♀ ( BYUC) , 1♂ SEM. Thunder Creek , 9 miles E Newhalem, 27 May 1994, G. Kraft, 2♂ ( BYUC) , 1♂ SEM. Yakima Co., South Fork Clear Creek, White Pass , Hwy 12, 15 June 2004, B. Stark , R.W. Baumann , 1♂, 2♀ ( BPSC) , 1♂ SEM.

Adult habitus. Male forewing length 6.0- 6.5 mm (n = 16), female 6.5-7.0 mm (n = 8). General body color dark brown, head brown on occiput and frons, but with a pale transverse band extending between compound eyes behind ocelli. Pronotum mostly pale brown, but with sutures dark brown, and with a large brown rugose area on either side of median suture ( Fig. 43 ). Wings brown with conspicuous pale humeral and stigmatic markings, but subapical transverse pale band absent ( Fig. 1 ). Tibiae almost entirely dark brown and without bands.

Male genitalia (n = 35). Typical of the genus but paraprocts long and slender with fin poorly developed and mostly sclerotized ( Figs. 41 , 44 , 46- 51 ). Paraproct body extending from base to fin apex 425-475 μm in length; greatest paraproct height across fin apex 94-125 μm. The apical digit on the paraprocts ranges from 138-154 μm in length.

Female subgenital plate (n = 2). Median lobe small, parabolic and poorly sclerotized. Large, heavily sclerotized lateral lobes triangular and broadly joined to posterolateral area of sternum 8 forming a continuous sclerotized margin. Median field of plate unsclerotized along a longitudinal stripe. Sternum 9 unsclerotized in a small area posterior to projecting subgenital plate ( Fig. 45 ).

Egg. Unknown.

Larva. Described by Ricker (1943) and Stewart & Stark (1988, 2002).

Diagnosis. This species lacks the pale wing bands found in most M. zonata and males have longer and narrower paraprocts than other Moselia . All specimens examined from Oregon (except Curry, Josephine and most of Jackson counties) and Washington represent this species ( Fig. 52 ). See additional discussion above. Females of the two species overlap in subgenital plate structure and cannot be reliably distinguished without the pale wing band character.

Figures

Figs. 1-2. Adult Moselia habitus. 1. M. infuscata, Oregon, Clackamas Co., Still Creek Campground. 2. M. zonata, Oregon, Jackson Co., Sheep Creek, Wagner Gap Road.

Figs. 39-42. Moselia right paraprocts from four populations studied by Gill et al. (2015). The same group designations used by Gill et al. are used here. 39. Group 1, Split Rock Creek, Jackson Co., Oregon, specimens with banded wings. 40. Group 2, Big Springs, Mt. Shasta City Park, Siskiyou Co., California, specimens without banded wings. 41. Group 3, Big Springs, Hwy 49, Sierra Co., California, specimens without banded wings. 42. Group 4, Butte Creek, Butte Co., California, specimens without banded wings. Group 1, group 2 and group 4 specimens each have large fins and a mean genetic distance of 0.03 from the other two groups, and each of these three groups have a mean genetic distance of 0.06 from small fin specimens of group 3. Specimens in groups 1, 2 and 4 are placed as M. zonata sp. n. and those in group 3 are placed as M. infuscata.

Figs. 43-45. Moselia infuscata structures, Oregon, Deschutes Co., Black Pine Spring, 8 miles SW Sisters. 43. Adult pronotum. 44. Right male paraproct, lateral aspect. 45. Female abdominal sterna 8-9.

Figs. 46-51. Moselia infuscata right paraproct, lateral aspect. 46. Washington, Chelan Co., White Pine Campground. 47. Washington, Chelan Co., White Pine Campground. 48. Oregon, Benton Co., Yew Creek. 49. Oregon, Deschutes Co., Black Pine Spring. 50. Oregon, Lane Co., Alder Spring. 51. Oregon, Linn Co., Willis Creek seeps.

Fig. 52. Distribution of Moselia species in the Pacific Northwest. Published records of M. infuscata from British Columbia were not included because no specimens were available for this study.

Figs. 9-14. Moselia zonata right paraproct, lateral aspect. 9. Big Springs, Mt. Shasta, California. 10. Big Springs, Mt. Shasta, Siskiyou Co., California. 11. Black Butte Spring, Siskiyou Co., California. 12. Domingo Springs, Plumas Co., California. 13. Old Boundary Spring, Shasta Co., California. 14. Tributary Big Chico Creek, Butte Co., California.

Figs. 3-8. Moselia zonata structures, 3-5, California, Humboldt Co., 0.5 miles E Cedar Creek, Hwy 299. 3. Adult pronotum. 4. Right male paraproct, lateral aspect (d = digit, f = fin, h = hook). 5. Female abdominal sterna 8-9. 6-8, California, Plumas Co., Domingo Springs. 6. Adult pronotum. 7. Right male paraproct, lateral aspect. 8. Female abdominal sterna 8-9.