Anacroneuria debilis ( Pictet, 1841 )

Novaes, Marcos Carneiro & Bispo, Pitágoras Da Conceição, 2014, A new species and notes on Perlidae (Plecoptera) from Paraná and Santa Catarina States, southern Brazil, Zootaxa 3765 (5), pp. 458-468 : 459

Anacroneuria debilis ( Pictet, 1841)

Figs. 1–5 .

Perla (Perla) debilis Pictet, 1841: 255 ; Anacroneuria debilis, Zwick, 1972: 1155 ; Zwick, 1973: 486; Froehlich, 2002: 76; Baldin et al., 2013: 392.

Material examined. BRAZIL (BR), Santa Catarina (SC), Nova Teutonia: 12 males, xi.1980, Fritz Plaumann ( DZUP); 1 male, 7.x.1955 (Smithsonian Institution National Museum of Natural History—NMNH); 5 males, 27 females, i.1975 ( NMNH). Paraná (PR), Foz do Iguaçu, Cataratas: 1 female, 8.iii.1968, W. L. & J. G. Peters ( NMNH).

Remarks. The redescriptions and comments about this species can be found in the papers of Zwick (1972, 1973), Froehlich (2002) and Baldin et al. (2013). The adult males studied here have a forewing length of 11.1–12.1 mm. The structure of the penial armature ( Figs. 3–5 ) agrees with Zwick (1972) and Baldin et al. (2013). However, in several of the above listed males, the penial armature is slightly smaller and has a stronger dorsal inclination apically. The penial differences at this time are accepted as variation occurring in A. debilis . However, study of additional material from different localities is needed to ascertain if cryptic species are involved.

Figures

FIGURES 1 – 5. Anacroneuria debilis. Male: (1) head and pronotum; (2) sternum 9; (3 – 5) penial armature (3 dorsal, 4 ventral and 5 lateral views). Scales: figure (1) 0.5 mm; figure (2) 1.0 mm; figures (3 – 5) 0.75 mm.