Megaleuctra kincaidi Frison, 1942

Baumann, Richard W. & Stark, Bill P., 2013, The Genus Megaleuctra Neave (Plecoptera: Leuctridae) In North America, Illiesia 9 (6), pp. 65-93 : 77-78

publication ID

https://doi.org/ 10.5281/zenodo.4760872

publication LSID

lsid:zoobank.org:pub:6FA6F27D-DBC8-4F39-8063-8BA3C5508155

DOI

https://doi.org/10.5281/zenodo.4765119

persistent identifier

https://treatment.plazi.org/id/03BFB10D-FF81-FFB1-FE90-1B9C32D0FDA2

treatment provided by

Felipe

scientific name

Megaleuctra kincaidi Frison
status

 

Megaleuctra kincaidi Frison View in CoL

( Figs. 35-53 View Figs View Figs View Figs )

Megaleuctra kincaidi Frison 1942:15 View in CoL .

Holotype ♂ ( INHS). Type locality: Fryingpan Creek, Mount Rainier National Park (Pierce Co.), Washington, examined

Material examined. IDAHO: Clearwater Co. Lolo Pass, 30 June 1964, W.F. Barr, 1♂, 1♀ ( BYUC). GoogleMaps Idaho Co., Cow Creek, New Elk Summit Road , 27 May 1972, D.S. Potter, R.A. Haick, L. Lockwood, 1♀ ( BYUC). GoogleMaps Latah Co. , Big Sand Creek , Saint Joe National Forest , 2880’, 21 May 1975, J.H. Baker, 1♂, 1♀ ( USNM). GoogleMaps MONTANA: Missoula Co. , Seep , Granite Creek , tributary Lolo Creek , 46.74° N 114.59° W, 25 June 2013, Z.J. Crete, 1♀ ( ZCSC). GoogleMaps Ravalli Co. , Inlet to Bryan Lake , 6800’, 17 July 1995, A.L. Sheldon, 1♀ ( BYUC). GoogleMaps Left intermittent tributary Lick Creek , 4760’, 25 May 1996, A.L. Sheldon, 1♂ ( BYUC). GoogleMaps Intermittent right fork, left tributary Lick Creek , 4800’, 25 May 1996, A.L. Sheldon, 2♂, 2♀ ( BYUC). GoogleMaps Roaring Lion Creek , at road head, 18 March 1996, A.L. Sheldon, 2♂, 2♀ ( BYUC). GoogleMaps OREGON: Clackamas Co. , Seep, Still Creek , Still Creek Campground, Mount Hood National Forest , 5 June 1991, R.W. Baumann, B.P. Stark, C. Henderson, 7♂, 2♀, 3 larvae ( BPSC, BYUC). GoogleMaps Same site, 2 June 2000, B.P. Stark, I. Sivec, M.C. Zúñiga, 3♂, 1♀ ( BPSC, BYUC). GoogleMaps Clatsop Co. , East Fork Humbug Creek , 3 May 1964, S.G. Jewett, Jr., 1♂ ( CASC). GoogleMaps WASHINGTON: Kittatis Co. , Bell Creek , Cle Elum Lake , 22 May 1946, S.G. Jewett, Jr., 1♂ ( OSUC). GoogleMaps Pierce Co. , Fryingpan Creek , Mount Rainier National Park , 5000’, 23 July 1937, W.E. Ricker, 1♂, Holotype ( CUIC). GoogleMaps Ghost Lake , 1 km. N jct. Hwys 123 & 410, 46°52’25” N 121°32’23” W, 6 July 2004, M. Grove, 1♂ ( CSUC). GoogleMaps

In addition, Frison (1942) lists two male paratypes from the following localities that were not examined by us: Oregon, between St. Helens and Veronia, 17 April 1937, Gray and Schuh, 1♂, and Washington, Seattle, 14 April 1932, unknown collector, listed by Hoppe (1938) as M. stigmata .

Male. Macropterous. Length of forewing 12-15 mm; body length 12-14 mm. General color brown. Wings hyaline, with dark pigment occupying less than half the costal space beyond the cord. Radial sector of forewing usually with two or three branches. Tergum 9 with a pair of long thin lobes, narrowing to a pointed tip, without basal forked process ( Figs. 35, 36 View Figs , 38, 42, 48); subgenital plate tongue-like, apex narrowly rounded ( Fig. 44 View Figs ); ventral lobe at base sternum 9 in lateral view subparallel, apex rounded. Tergum 10 with ventrobasal expansion short, sclerotized, bearing paired narrowly pointed processes ( Figs. 36 View Figs , 40, 51). Epiproct broadly triangular dorsally when expanded, formed into two sclerotized plates lateral of middorsal groove ( Figs. 35 View Figs , 38, 39), when basal, divided into two plates, each ending in pointed apical processes ( Figs. 46, 50 View Figs ). Subanal probe directed upward fitting in middorsal groove of epiproct, tip expanded with subapical notch in lateral view, forming two lobes: upper lobe broader at base and narrowing to apex, bearing tube, lower lobe terminating in broad, rounded groove, which surrounds the tube ( Figs. 38-43 View Figs , 47- 49 View Figs ), cerci formed into an elongate single segment ( Figs. 36 View Figs , 42).

Female. Macropterous. Length of forewing 16-18 mm; body length 19-20 mm. Coloration similar to male. Radial sector of forewing with two branches. Sternum 8 with subgenital plate extending past tip of abdomen 1.5-2.0 mm, narrowing gradually to tip, round in cross section ( Fig. 37 View Figs ). Sternum 9 a developed ovipositor ( Fig. 52 View Figs ); cerci inconspicuous ( Fig. 37 View Figs ).

Larva. Described by Stewart and Stark (2002) from unassociated material.

Egg. Undescribed.

Diagnosis. Males of M. kincaidi can be distinguished from M. complicata and M. stigmata by the shape of the paired processes on tergum 9. They are narrow and very thin, ending in a pointed tip in M. kincaidi ( Figs. 42 View Figs , 48 View Figs ) while in M. complicata ( Figs. 3 View Figs , 6 View Figs , 13 View Figs ) and M. stigmata Figs. 54, 55 View Figs , 61, 67, 69) they are broader basally and terminate in a rounded or slanted tip. In addition, the epiproct is triangular dorsally and bears small pointed processes on each side in M. kincaidi ( Figs. 36 View Figs , 38, 40, 46), while it is elongate and broad with large paired backward directed hooks apically in M. complicata ( Figs. 3 View Figs , 6-9 View Figs , 13, 15, 17 View Figs ) and in M. stigmata it is parallel and even more elongate, bearing ornamented lateral fringes terminally, and sharp, angular, backward directed prongs apically ( Figs. 57, 58, 61, 62 View Figs , 65, 67 View Figs ). The female of M. kincaidi may be provisionally distinguished from M. complicata by the presence in the forewing of usually only 2 radial sector branches (typically 3 in M. complicata and 5 in M. stigmata , however, all three species are variable in this character). Associated males should be examined to confirm identifications.

USNM

Smithsonian Institution, National Museum of Natural History

OSUC

Oregon State University

CUIC

Cornell University Insect Collection

CSUC

California State University, Chico, Vertebrate Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Plecoptera

Family

Leuctridae

Genus

Megaleuctra

Loc

Megaleuctra kincaidi Frison

Baumann, Richard W. & Stark, Bill P. 2013
2013
Loc

Megaleuctra kincaidi

Frison, T. H. 1942: 15
1942
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