Alloperla natchez Surdick & Stark

Willett, Michele R. & Stark, Bill P., 2009, The Alloperla Leonarda Group Of Eastern North America, With Sem Images Of Four Out-Group Species (Plecoptera: Chloroperlidae), Illiesia 5 (11), pp. 108-127 : 112

Alloperla natchez Surdick & Stark

( Figs. 25-30 )

Alloperla natchez Surdick & Stark, 1980:71 .

Holotype ♂ (United States National Museum), Little Sand Creek , Natchez Trace Parkway , Claiborne Co., Mississippi

Alloperla natchez: Brown & Stark, 1995:122 . Description of nymph and egg

Alloperla natchez: Hardy et al., 1994:368 . Distribution Alloperla natchez: Surdick, 2004:18 . Redescription

Material examined. MS: Claiborne Co., Ragsdale Creek , Regan Rd, 17 April 1993, B. Stark, 9 ♂, 7 ♀ ( BPS) . Franklin Co., Mill Branch , Homochitto National Forest, 14 May 1993, N. Phiefer, 2 ♂, 19 ♀ ( BPS) . Franklin Co., tributary of Porter Creek , 13 April 1993, C. Hardy, C. Boll, 9 ♂, 6 ♀ ( BPS) . Smith Co., Clear Creek , 3 mi SW Mize, 24 April 1991, B. Stark, D. Tanner, 1 ♂, 5 ♀ ( BPS) .

Epiproct. Length from base to fork, ca. 101 μm. Greatest pre-apical width, ca. 28 μm; apical width, ca. 27 μm. Cowl reaching almost to base of epiproct fork ( Figs. 25-26 ). Epiproct dorsum completely bare ( Figs. 27, 30 ), but apical third armed with irregular lateral rows of large, ventrolaterally directed setae ( Figs. 26- 29 ). Width relatively uniform from base to beyond midlength, but gradually narrowed in apical third to base of fork ( Figs. 26-27 ). Arms of fork project downward in lateral and frontal aspects ( Figs. 28-29 ).

Figures

Figs. 25-30. Alloperla natchez epiproct structures, Porter Creek, Franklin Co., MS. 25. Male terminalia, dorsal aspect. 26. Epiproct and cowl, dorsal aspect. 27. Apical half of epiproct, dorsal aspect. 28. Epiproct and cowl, dorsolateral aspect. 29. Epiproct apex, frontal aspect. 30. Detail of basal epiproct surface.