Anacroneuria caraa De Ribeiro & Froehlich

De, Valdelânia R. & Froehlich, Claudio G., 2007, Two new species of Anacroneuria (Plecoptera: Perlidae) from southern Brazil, Zootaxa 1624, pp. 53-57: 55

publication ID 10.5281/zenodo.179257

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scientific name

Anacroneuria caraa De Ribeiro & Froehlich

sp. n.

Anacroneuria caraa De Ribeiro & Froehlich  , sp. n.

( Figs. 6–10View FIGURES 6 – 10)

Diagnosis. Frons mostly light brown, M –line light, lappets brown ( Fig. 6View FIGURES 6 – 10). Genae and parietalia light brown. Antennae and palpi brown. Pronotum pale brownish, darker laterally. Legs brown, mid and hind femora bicolored. Wing membrane and veins light brown, C and Sc paler. Basal cercomere light, rest brownish.

Male. Forewing length, 11.8 mm. Hammer a short truncate cone ( Fig. 7View FIGURES 6 – 10). Hooks regularly curved with pointed tips ( Fig. 8View FIGURES 6 – 10). Ventral vesicles large. In lateral view, the penial apex bends dorsally ( Fig. 10View FIGURES 6 – 10). Dorsal keel absent. Ventral membrane near base of hooks with a scaly appearance ( Fig. 9View FIGURES 6 – 10).

Female. Unknown.

Type Material. Holotype, male: BRAZIL, Rio Grande do Sul, Caraá  , Rio dos Sinos (29 º 42 ' 53 ’’S 50 º 17 ' 19 ”W), 0 4. XII. 2003.

Distribution. Known from the type locality.

Etymology. The name refers to the municipality in which it was collected. Noun in apposition.

Remarks. This species was collected together with A. fuscicosta ( Enderlein 1909)  , to which it bears some resemblance. The latter, however, is darker and, medially on the frons, the brown pigment occupies the area from the postfrontal line to the M-line. They are readily separable by their penial armatures; that of A fuscicosta  having a ventrally sloping apex, small ventral vesicles and apices of hooks blunt. In fact, the penis of A. caraa  , with its lack of a keel, the large ventral vesicles and the upturned apex form a unique combination in the genus. The scaly area in the ventral membrane near the base of the hooks of A. caraa  is also uncommon.