Nallachius potiguar, Machado, Renato José Pires & Rafael, José Albertino, 2010

Machado, Renato José Pires & Rafael, José Albertino, 2010, Two new species of Dilaridae (Insecta: Neuroptera) with additional notes on Brazilian species, Zootaxa 2421, pp. 61-68 : 62-65

Nallachius potiguar new species

( Fig. 1 b)

Diagnosis. Body color pattern white with black tubercles, MP2 vein not fused with CuA vein and costal crossveins only forked on the distal half in the forewing, males with dorsal lobe of ectoproct well-developed and widely separated on the midline.

Description. Body length: 2.1mm. Head white with dark brown band just posterior to antennae; line covers anterior tubercles, posterior two tubercles white. Antennae 13-segmented, segments 2–12 with long lateral processes, straight with slight curve at apex. Lateral processes white with small dark brown spot at base ( Fig. 1 b).

Pronotum white with two anterolateral and two posterolateral tubercles, all dark brown, covered with long setae. Pterothorax white with three large, dark-brown spots, two lateral and one anteromedial. Scutellum dark brown with white medial stripe. Pleuron pale yellow.

Legs white except for pale yellow coxa and dark brown apex of tibia. Forewing elongate with posterior margin rounded, membrane hyaline and with irregular brown infuscate bands. Costal margin with six to seven brown spots. Costal crossveins forked on distal half. Two radial crossveins and RS vein five branched. First MA fork just after the level of the second radial crossvein. First MP fork before level of MA origin. CuA vein not fused with MP2 vein. Forewing length: 4.2 mm. Hindwing similar to forewing except shorter, costal margin with four spots and RS vein four branched.

Abdominal tergites white with two lateral tubercles dark brown covered with long setae. Terminalia: ectoproct flattened with dorsal lobes widely separated along midline and digitiform process without apical spine. Gonocoxites connected posteriorly with gonarcus, slender and apex unmodified. Mediuncus lobes spatulate with apex curved inward. Median lobe ends at middle of mediuncus.

Etymology. Derived from the Brazilian term for a person born in the state of Rio Grande do Norte ( potiguar ), where the holotype was collected.

Material examined. Holotype, male, BRAZIL: Rio Grande do Norte: Baía Formosa, Mata Estrela, 062319 S – 350105W/ 44m, 24.v.2007, J. A. Rafael & F. F. Xavier Fο, luz. Holotype condition: good, except collapsed terminalia that was placed in a microvial with glycerine, pinned along with the specimen.

Comments. Nallachius potiguar n. sp. is most similar to N. infuscatus Penny 1981 from the Brazilian Amazon, to N. prestoni (McLachlan, 1880) from Rio de Janeiro state ( Brazil) and to N. reductus Carpenter, 1947 from Paraguay. All four have flattened dorsal lobes of the ectoproct which are widely separated on the midline. Nallachius potiguar n. sp., with forked costal crossveins, can be distinguished from N. infuscatus and N. reductus , in which they are unforked; from N. prestoni by the costal crossveins that are only forked on the distal half (forked along the entire length long in N. prestoni ) and by the body color pattern, blackish-fuscous in N. prestoni and white with black tubercles in N. potiguar .

Figures

FIGURE 1. a, Nallachius furcatus Machado & Rafael, new species; b, Nallachius potiguar Machado & Rafael, new species.