Anacroneuria tabatae, Froehlich, Claudio G., 2010

Froehlich, Claudio G., 2010, Anacroneuria (Plecoptera, Perlidae) from the Mantiqueira Mountains, São Paulo State, Brazil, Zootaxa 2365, pp. 55-68 : 63-67

Anacroneuria tabatae sp.n.

( Figs. 19–25 )

Type Material. Holotype, m: BR, SP, Campos do Jordão, PECJ, Córrego Galharada (22°41’29”S, 45°27’58”W): 05/III/1996, CGF, RWH, HP, RG. Paratypes. Same locality: 1 m, 26/III/1987, CGF, LGO; 1 f, I– II/1987, YAT; 8 m, 1 f, 5/III/1996, CGF, RWH, HP, RG; 5 f, 20/IV/2005, CGF, MRS, AES, G. A. Silveira. Ribeirão Casquilho (22°39’49”S, 45°27’04”W): 3 f, 05/III/1986, CGF; 5 m, 02/IV/1986, CGF; 1 m, 26/XI/ 1986, CGF; 3 m, 1 f, 25/III/1987, CGF, LGO; 2 m, 23/IV/1987, CGF, ACRF. Córrego Campo do Meio (22°41’28S, 45°28’26”W): 16 m, 1 f, 04/IV/1986, CGF.

Additional material. Campos do Jordão, PECJ, Córrego Galharada: 1 m, III/1986, YAT; 1 m, 4 f, 04/III/ 1986, CGF; 1 f, 04/IV/1986, CGF; 1 f, X/1986, YAT; 2 f, 24–26/III/1987, CGF, LGO; 4 f, 22/IV/1987, CGF, ACRF; 1 f, 28/IV/2006, MRS. Ribeirão Casquilho: 1 f, 03/IV/1986. Guaratinguetá, Engenheiro Eugênio Lefèvre, 1200 m, 2 f, 21/XII/1962, LTF, Rabello, Medeiros; 1 m, 2 f, XII/1962, LTF.; 1 m, 1 f, III/1963, LTF.

Description. General colour brownish ochraceous. Central frons ochraceous, commonly darker between ocelli, in some specimens darker area extends anteriorly ( Fig. 19 ); M-line yellowish. Lateral and anterior frons usually with darker markings; lappets dark. Genae brownish. Parietalia darker at sides and, commonly, along coronal line. Antennae and palpi brownish; basal segments of palpi lighter. Pronotum light brown to brown, rugosities lighter, broad pale median stripe; in several specimens, lighter lateral areas exist. Mesonotum brownish, paler medially. Legs ochraceous to light brown, bases of femora lighter. Wing membrane and veins light ochraceous to brownish; C, Sc, R and basal RA pale. Cerci ringed in pale and light brown.

Male. Forewing length, 8.2–10.2 mm (n=39). Hammer ( Fig. 20 ) almost cylindrical, 70–80 µm long. Penial armature ( Figs. 21–22 ), in dorsal view, 3-lobed apically, lateral lobes (shoulders) well sclerotized and, in side view, arching. Hooks regularly curved, pointed. Ventral apical vesicle single, flaring laterally. Dorsal keel absent.

Female. Forewing length, 11.8–15.0 mm (n=25). Subgenital plate basically 4 lobed, but lobes varying in size ( Figs. 23–24 ). Median notch shallow to relatively deep, mesal lobes narrower than lateral ones and frequently bent inwards. Lateral lobes from about the same height as the mesal ones to practically absent. Distal margin of St9 mostly shallowly concave, slightly sclerotized; larger hairs only near margin. Laterosternite sclerotized at limit of St9.

Egg ( Fig. 25 ). Oval, 0.20–0.21 x 0.35–0.37 mm (N=6).

Remarks. This species is distinguished by the penial armature, with its unique flaring, single, ventral apical vesicle, besides its shoulders and the absence of a keel.

This was the commonest species in PECJ. It was flying from October to April but most (69 out of 84) in March and April.

Etymology. The name honours Yara Aiko Tabata, researcher at the Salmoniculture Station of Campos do Jordão, State Fisheries Institute, for her help in collecting and, especially, in rearing nymphs.

Figures

FIGURES 19 – 22. Anacroneuria tabatae sp. n. Male: (19), head and pronotum; (20), sternum 9 and hammer; (21 – 22), penial armature in dorsal and lateral views. Scale bar: (19), 1.0 mm; (20), 0.35 mm; (21 – 22), 0.18 mm.

FIGURES 23 – 25. Anacroneuria tabatae sp. n. Female: (23), sterna 8 and 9; (24), second specimen, sternum 8 with eggs. (25), egg. Scale bar: (23), 0.9 mm; (24), 1.0 mm; (25), 0.27 mm.