Anacroneuria cushueme Stark & Gill, 2012

Stark, Bill P., Kondratieff, Boris C. & Gill, Brian, 2012, New Species And Records Of Anacroneuria (Plecoptera: Perlidae) From Ecuador And Paraguay, Illiesia 8 (6), pp. 78-93 : 82

Anacroneuria cushueme Stark & Gill sp. n.

( Figs. 6-10 )

Material examined. Holotype ♂ and 1♂ paratype, Ecuador, Pastaza, Rio Cushueme, Cushueme , 150 km SE Puyo, 320 m, 15-30 May 1971, B. Malkin ( CASC).

Adult habitus. General color pale yellow patterned with pale brown. Head pattern indistinct, almost entirely yellow with only slightly darkened lappets ( Fig. 6 ). Pronotum with sublateral pale brown bands; area adjacent to median suture and anterolateral margins pale. Femora pale brown, tibiae slightly darker at apex and base. Wings transparent, veins pale amber.

Male. Forewing length 9 mm. Apical section of aedeagus with median, projecting lobe narrowed slightly from base and truncate at tip ( Fig. 8 ). Shoulders strongly sclerotized, bulging laterad; body of aedeagus wider proximal to shoulder bases. Dorsal keel consists of two long, divergent ridges and two pairs of shorter ones near base of longer median keel lines ( Fig. 10 ). Hooks relatively wide and acute. Lateral lobes on apical section project away from aedeagal body, one pair lunate and the other almost quadrate ( Fig. 9 ). Hammer thimble shaped ( Fig. 7 ).

Female. Unknown.

Larva. Unknown.

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

Diagnosis. Based on aedeagal morphology, this species is related to the A. yameo Stark & Sivec 1998 group of species, which also includes A. pakitza Stark & Sivec 1998 , A. pinza Stark 1995 , and A. zunigae Stark 2001 . The new species bears a greater similarity in aedeagal structure to A. yameo and A. pakitza but in these species the shoulder region bulges toward the aedeagal apex creating an apically trilobed structure; this is quite distinct in the dorsal aspect and differs from the comparable structures in A. cushueme which bulge more laterad. In A. cushueme the mesal projection of the aedeagal apex is truncate at the tip and broad at the base which also differs from both related species.

Figures

Figs. 6-10. Anacroneuria cushueme male structures. 6. Head and pronotum. 7. Abdominal sternum 9. 8. Aedeagus, ventral. 9. Aedeagus, lateral. 10. Aedeagus, dorsal.