Acroneuria bachma Cao & Bae

Stark, Bill P. & Sivec, Ignac, 2008, New Vietnamese Species Of Genus Acroneuria (Plecoptera: Perlidae), Illiesia 4 (16), pp. 154-160 : 158

Acroneuria bachma Cao & Bae

( Fig. 16 )

Acroneuria bachma Cao & Bae, 2007:193 .

Holotype ♂ (Seoul Women’s University Aquatic Insect Collection), Bach Ma National Park , Thua Thien‐ Hue Province, Vietnam

Material examined. Vietnam: Thua Thien‐ Hue Province , Bach Ma National Park , near junction Rhododendron and Five Lakes trails, 16° 11’ 10” N, 107° 50’ 55” E, 1200 m, 16 June 2000, B. Hubley, D.C.Darling, ROM 2000531 , 1 ♂ (pinned, ROM) . Thua Thien‐ Hue Province, Bach Ma National Park, campsite trail, edge of small stream, 1200 m, 16° 11’ 36” N, 107° 51’15” E, 2 June 2000, B. Hubley, ROM 2000502 , 2 ♀ (pinned, ROM) . Thua Thien‐ Hue Province , Bach Ma National Park, 100 m along road past Five Lakes Trail, 1200 m, 16° 11’ 37” N, 107° 51’ 19” E, 9 May 2000, B. Hubley, ROM 2000518 , 1 ♀ (pinned, IEBR) . Same site, 11 May 2001, D. Currie, B. Hubley, ROM 2001522 , 1 ♀ (pinned, ROM) . Same site, 15 June 2000, ROM 2000527 , 2 larvae ( ROM) .

Remarks. This series of specimens are in close agreement in most respects with the description of Cao & Bae (2007). They are, however, slightly darker with a general brownish body and wing coloration. In addition, the aedeagal shape and armature pattern

in the original description appear to be based on an incompletely everted specimen. We offer the following modification based on cleared and everted specimens.

Aedeagus a long, slender, membranous bag, narrowed in apical half and slightly forked at the tip; apical section armed with midventral pair of long slender patches of dark red‐ brown setal spines ( Fig. 16 ); mesoventral section armed with scattered fine setal spines; basal section armed with a continuous ring of microtrichia.

Cao & Bae (2007) based their larval association on co‐ occurrence of adult and larval specimens at Bach Ma National Park and the absence of “…other acroneuriids…found in the park area…”. We can confirm their association on the basis of dissection and eversion of the aedeagus from a pharate specimen.

Figures

Figs. 16‐19. Acroneuria structures. 16. A. bachma aedeagus, ventral, 17. A. magnifica aedeagus, ventral, 18. A. VN‐A female terminalia, ventral, 19. A. VN‐A vagina, dorsal.