Anacroneuria vagante, Stark & Baumann, 2011

Stark, Bill P. & Baumann, Richard W., 2011, Records Of Anacroneuria (Plecoptera: Perlidae) From Bolivia And Paraguay With Descriptions Of Three New Species, Illiesia 7 (19), pp. 182-191 : 185-191

Anacroneuria vagante sp. n.

( Figs. 6-10 )

Material examined. Holotype ♂, BOLIVIA: La Paz Department, Province Nor Yungas, Rio Vagante, Vagante , 16 ° 11’ S, 67 ° 41’ W, 3650’, 12 November 2009, S.M. Clark, H.R. Hinkson ( USNM).

Adult habitus. General color brown, patterned with areas of dark brown and pale brown or yellow. Head with a large area of dark pigment covering ocellar region and extending forward and laterad over much of frons ( Fig. 6 ); lappets dark brown and occiput with area of dark pigment outlining a pair of triangles with pale centers; antennae and palpi brown. Mid and fore femora banded with dark pigment in apical third, tibiae uniformly dark brown (hind legs missing). Wings membranes brown, veins dark brown.

Male. Forewing length 8.5 mm. Hammer thimble shaped ( Fig. 7 ). Aedeagal apex simple, scoop shaped ( Figs. 8-10 ), but with heavily sclerotized lateral margins, a prominent dorsal keel which forms an Xpattern ( Fig. 10 ), and a pair of prominent membranous ventral lobes; lateral margins in dorsal aspect somewhat scalloped. Hooks slightly wider than in most species.

Female. Unknown.

Larva. Unknown.

Etymology. The species name, used as a noun in apposition, is based on the type locality of Rio Vagante.

Diagnosis. The aedeagus of A. vagante is most similar to that of A. karina Stark , known from Venezuela (Stark 1999), however that species lacks the distinctive head and pronotal pattern of A. vagante ; in addition the bases of the aedeagal hooks in A. karina are more swollen, the dorsal keel is shorter, and the ventral membranous lobes smaller in that species than in A. vagante . The aedeagus of the new species is also generally similar to that of A. manauensis Ribeiro-Ferreira , described from Brazil (Ribeiro-Ferreira & Froehlich 2001), A. puna Stark , described from Ecuador ( Stark 2001), and A. taylori Stark , described from Bolivia ( Stark 2004). The new species differs from the latter two in having a much broader area of dark pigment on the frons, but also differs from the former two species in having a prominent pair of membranous lobes on the aedeagal apex. It differs from the latter species in lacking subchelate aedeagal hooks and in having larger membranous lobes on the aedeagal apex.

Anacroneuria vagante sp. n. La Paz

Figures

Figs. 6-10. Anacroneuria vagante structures. 6. Head and pronotum. 7. Male sternum 9. 8. Aedeagus, ventral. 9. Aedeagus, lateral. 10. Aedeagus, dorsal.