Anacroneuria

Stark, Bill P., 2012, Anacroneuria Pakaraima And A. Wokomung, Two New Stonefly Species From Guyana (Plecoptera: Perlidae), Illiesia 8 (10), pp. 114-118 : 117-118

Provisional key for male Anacroneuria known for Guyana

(Male A. wapishana Stark 1999 unknown)

1 Forewing patterned with a longitudinal amber band, narrow at the base and expanded around an unpigmented circular area beyond cord ( Fig. 7 ), pattern obscure in some specimens.….…….…. 2

1’ Forewing pattern not as above …………………. 3

2 Hammer width greater than height ( Fig. 8 ); aedeagal apex somewhat circular in lateral aspect ( Fig. 10 ); dorsal keel line short and reaching apex ( Fig. 11 ) …………………...…………. A. wokomung

2’ Hammer laterally compressed, height greater than width ( Fig. 1 ); aedeagal apex curved ventrad but flattened across ventroapical margin ( Fig. 4 ); dorsal keel line obscure, but weak arms diverge near tip ( Fig. 5 ) ……………………… A. pakaraima

3 Apical aedeagal section with a prominent pair of membranous lobes ( Fig. 9 in Stark, 1999) …….. 4

3’ Apical aedeagal section without membranous lobes ( Fig. 3 in Stark, 2000) …………………….. 6

4 Aedeagal hooks stout (Fig. 29 in Stark, 1999); body of aedeagus with a dorsomesal, transverse, arcuate process (Fig. 31 in Stark, 1999) …..…………….……………….……..… A. makushi

4’ Aedeagal hooks relatively slender ( Figs. 9 , 45 in Stark, 1999); body of aedeagus without dorsomesal, transverse, arcuate process …..…… 5

5 Apex of aedeagus gradually narrowed from hooks to tip ( Fig. 9 in Stark, 1999); inner margins of hooks smooth …………………...…… A. arawak

5’ Apex of aedeagus flared subapically (Fig. 45 in Stark, 1999); inner margins of hooks irregularly scalloped …….………………………. A. phantoma

6 Dorsal aedeagal keel a basally directed triangular process (Fig. 52 in Stark, 1999); R-vein of forewing conspicuously darker than others (Fig. 53 in Stark, 1999) …………………….……………… A. pictipes

6’ Dorsal aedeagal keel consists of a pair of narrowly separated ridges ( Fig. 5 in Stark, 2000); R-vein similarly pigmented to other forewing veins ……………………………………………….. 7

7 Hooks almost straight and crossing near aedeagal midlength (Fig. 91 in Stark, 1995).….….. A. cruza

7’ Hooks evenly curved and crossing at base of aedeagal apex ( Fig. 3 in Stark, 2000) ….……….. 8

8 Aedeagal apex truncate, width of aedeagal base ca. 2.6 times width of aedeagal apex ( Fig. 2 in Stark, 2000) ……………………………… A. takutu

8’ Aedeagal apex rounded, width of aedeagal base ca. 6.5 times width of aedeagal apex (Fig. 109 in Stark, 1995) ……………………..…………. A. llana

Figures

Figs. 6-13. Anacroneuria wokomung structures. 6. Head and pronotum. 7. Forewing. 8. Male sternum 9. 9. Male aedeagus, ventral. 10. Male aedeagus, lateral. 11. Male aedeagus, dorsal. 12. Egg outline. 13. Female abdominal sterna 8-9.

Figs. 1-5. Anacroneuria pakaraima structures. 1. Male sternum 9. 2. Female abdominal sterna 8-9. 3. Male aedeagus, ventral. 4. Male aedeagus, lateral. 5. Male aedeagus, dorsal.