Anacroneuria jaciara, Bispo, Pitágoras C., Neves, Cláudio O. & Froehlich, Claudio G., 2005

Bispo, Pitágoras C., Neves, Cláudio O. & Froehlich, Claudio G., 2005, Two new species of Perlidae (Plecoptera) from Mato Grosso State, western Brazil, Zootaxa 795, pp. 1-6 : 2-4

Anacroneuria jaciara sp. n. Bispo & Neves ( Figs. 1–7 )

Material. Holotype: BRAZIL, Mato Grosso, Jaciara , Córrego Tenente Amaral, 1 male ( CERMT # 1), 1.IX.1999. Paratypes: same locality, 4 males, 1 female, 1.IX.1999; 1 female, 14.IX.1999; 5 males, 1 female, 3. XI.1999; 2 males, 4 females, 20.XI.1999; 2 males, 27.XI.1999; 1 male, 1 female, I.2000; 2 males, 1 female, 6.I.2000; 1 male, 18.I.2000; 2 females, 29.I.2000; 1 male, 2 females, 16.III.2000; 2 females, 24.III.2000; 2 males, 13.V.2000; 3 males, 2 females, 26.V.2000; 1 female, 27.VII.2000; 5 males, 1 female, 16.IX.2000; 4 males, 1 female, 12.IX.2000; 2 males, 5.I.2001; 3 males, 1 female, 20.I.2001; 2 males, 1 female, 17.III.2001; 1 male, 25.III.2001; 1 female, 25.V.2001; 3 males, 2 females, 17.VII.2001. Cáceres, 1 male, 44 females, 14.X.2003.

Description. General color brownish to ochraceous. Frons of the general color but Mline and clypeal area lighter, sometimes not clearly delimited ( Fig. 1 ); lappets brownish, genae and parietalia ochraceous to yellowish. Antennae brownish, maxillary palpi brownish, labial palpi yellowish. Pronotum ochraceous with darker sublateral stripes, rugosities lighter ( Fig. 1 ). Wing membrane ochraceous, veins brownish to ochraceous, costal vein pale. Femora ochraceous, more yellowish in some specimens; tibiae and tarsi ochraceous. Cerci ochraceus.

Male. Forewing length of specimens from Jaciara , 9.5–12 mm (n=48, mean= 10.77 mm, s.d.= 0.62 mm); of specimen from Cáceres, 9.5 mm. Hammer conical, truncate apically ( Fig. 2 ). Penial armature in dorsal/ventral view narrowing gradually to near the apex, then abruptly; ventral vesicles present near distal end. Dorsal keel absent. Hooks smoothly curved, apices pointed ( Figs. 3–5 ).

Female. Forewing length of females from Jaciara , 14–17 mm (n=29, mean= 16.60 mm, s.d.=0.967); females from Cáceres, 12.5–15 mm (n=44, mean= 14.03 mm, s.d.=0.742). Subgenital plate four­lobed, median lobes narrower than lateral ones. Sternum 9 with T­shaped field of hairs, sublateral ones stronger ( Fig. 6 ). Egg oval, simple, 0.33 x 0.20 ( Fig. 7 ).

Remarks. The penial armature is similar to that of A. stanjewetti Froehlich (2002) from Santa Catarina, Brazil, and the provinces of Entre Ríos and Misiones, Argentina, but does not show, in dorsal view, wedge shaped­keel and does not have a marked distal curvature. As regards color, in A. stanjewetti the frons is darker and has a more marked pattern, and the pronotum is brown to the margins. The egg of A. stanjewetti is elongate oval and has a small peg in the posterior pole, absent in the present species.

Etymology. Jaciara , the municipality where the holotype was collected. Noun in apposition.

Figures

FIGURES 1 – 5. Anacroneuria jaciara sp. n. male. Fig. 1, head and pronotum; Fig. 2, sternum 9; Fig. 3, penial armature lateral view; Fig 4, ventral view; Fig. 5, dorsal view. Scales: 0.5 mm.

FIGURES 6 – 7. Anacroneuria jaciara sp. n. female. Fig. 6, sternum 8 and 9; Fig. 7, eggs. Scales: 0.5 mm.