Anacroneuria singela,

Duarte, Tácio & Lecci, Lucas Silveira, 2016, New species and records of Anacroneuria (Plecoptera: Perlidae) from the northeastern semi-arid region of Brazil, Zootaxa 4079 (2): 297-299

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Anacroneuria singela

n. sp.

Anacroneuria singela  n. sp.

( Figs. 4A –CView FIGURES 4 and Figs. 5A –DView FIGURES 5) Type material. Holotype, male: BR, BA: Itatim, Rio Paraguaçu, 26.iii.2012, light trap. Paratypes: BA, Lençóis, Chapada Diamantina, Rio Santo Antônio, 12°29'579''S, 41°19'752''W, 340m, light pan trap, 26.x.2008, ARC, RM & SM, 1 male, 3 females; BA, Iaçu, Rio Paraguaçu, 24.iii.2012, by hand, TD & IG, 1 male.

Description. A median sized species. Holotype, male: forewing length, 14 mm. Paratypes, males (n= 2): forewing length, 13.5–14 mm; females (n= 3): forewing length, 17–17.5 mm.

General color light brown to yellowish. Head yellowish, frons yellowish; clypeus and occiput ochraceous to yellowish ( Figs. 4A, BView FIGURES 4). Antennae with scape ochraceous; pedicel and flagellum ochraceous. Palpi yellowish. Pronotum light brown, darker laterally and with lighter median strip. Membrane and veins of wings pale yellowish ( Fig. 4CView FIGURES 4). Legs light brown to ochraceous with dark strip in distal part of the femur. Cerci ochraceous.

Male. Sternum IX with dark posterior strip. Hammer a truncate cone shaped ( Fig. 5AView FIGURES 5). Penial armature with pair of small distal vesicles. Dorsally terminal tube open in a small gonopore, slightly sclerotized, distal border convex ( Fig. 5BView FIGURES 5). Gonopore robust, keel almost rounded in lateral view ( Fig. 5CView FIGURES 5). Hooks with closed curve, short and pointed.

Female. Subgenital plate ochraceous to pale, 4-lobed ( Fig. 5DView FIGURES 5). Sternum VIII with field of bristles medially; lateral corners with sclerotized band, letero-median portion near the field of large bristles with small sclerotized spot. Sternum IX with a strip of bristles distally; distal portion with V-shaped notch.

Remarks. The penial armature of A. singela  resembles that of A. debilis  but the robust and almost rounded keel in A. singela  separates the male from males of A. debilis  . The terminal tube in A. singela  is rounded and robust in dorsal and ventral views whereas in A. debilis  appears thin. The female subgenital plate of A. singela  resembles that of A. debilis  , mainly in the form of the lateral lobes, but without the pattern bristles in the median region as indicated by the figures of Zwick (1973).

Etymology. The specific name singela  from Latin, meaning simple, without adornment. The name is a noun in apposition.


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