Three new species of Anacroneuria (Plecoptera: Perlidae) from the State of Mato Grosso do Sul, Brazil Author Froehlich, Claudio G. text Zootaxa 2007 1461 15 24 journal article 10.5281/zenodo.176439 cf8677d6-f0a4-4eb3-8dc7-41c1d6af610b 1175-5326 176439 Anacroneuria guaikuru sp. n. ( Figs. 10–14 ) Type Material . Holotype , m#: BRAZIL : Mato Grosso do Sul, Rio Salobra ( 20°41’35”S , 56°44’26”W ), 16– 21/III/2004 , O. Froehlich. Paratypes : 4 m #, same data as holotype . 1 m #, Córrego Salobrinha ( 20°40’58”S , 56°46’40”W ), IX/2003 , K.O. Righi, M.R. Cavallaro and O. Froehlich. Description . Frons ( Fig. 10 ) in front of M-line pale brown to brown, lappets brown, M-line light. Central frons ochraceous. Genae and parietalia light brown. Antennae and palpi brown. Pronotum ( Fig. 10 ) brown with a broad light median band. Legs brown, femora paler basally. Wing membrane infuscated, veins brown, C and Sc lighter distally. Basal cercal segments pale, distal ones ringed. FIGURES 10–12. Anacroneuria guaikuru sp. n. Male: (10) head and pronotum, scale bar=1mm; (11) sternum 9, scale bar=0.5mm; (12) penial armature dorsal, scale bar=0.1mm. Male . Forewing length, 8.9–9.8mm . Hammer ( Fig. 11 ) a truncate cone, slightly compressed, 0.1mm long. Apical part of penial armature, beyond hooks, long and thin; dorsal keel and ventral vesicle absent ( Figs. 12– 14 ). Hooks almost straight, distal half sculptured. Base of penial armature with slight sulcus. FIGURES 13–14. Anacroneuria guaikuru sp. n. Male: (13 – 14) penial armature in ventral and lateral views, scale bar=0.1mm. Female . Unknown. Remarks . This species is similar to both A. flinti Stark & Sivec (1998) and, especially to A. flavicoronata Jewett (1959) by the long penial apex. However, A. guaikuru differs from both species by its darker colour, particularly of the wings. Additionally, it differs from A. flavicoronata by having a straighter distal penis and hooks. Etymology . The name honours the Guaykuru Indians that once inhabited this region. These native peoples became expert horsemen after Spaniards brought horses to the region. Noun in apposition.