Neurostigma angelicum sp. nov.

urn:lsid:zoobank.org:act: 01FF68C2-EA58-4CFA-9FC2-51AC38E37C60

Figs 6–9, 22

Diagnosis

The new species belongs in species group II, of Mendivil-Nieto et al. (2020). It is similar to Neurostigma patriciae sp. nov. in wing venation. It differs from the latter by having a phalossome somewhat narrow basaly and anteriorly curved outwards, with a long and wide posterior process of the aedeagal arch, with a slight indentation of the external and internal margins; the anterior margin of the endophallus with a U-shaped indentation, originating two areas similar to ‘angels’ wings, extremely membranous, ending posteriorly with six strongly sclerotized and acuminate projections (Fig. 9C) and by having hypandrium almost square in shape, basally wide and distally straight, with slightly sclerotized sides (Fig. 9A).

Etymology

The specific name is an adjective in Latin, ‘ angelicus ’ = ‘angelic’, derived from ‘angel’ in reference to the shape of the endophallus of the phallosoma resembling an angel’s wing.

Type material

Holotype BRAZIL • ♂; Amazonas, Coari, Rio Urucu, Igarapé Marta 3; 04°48′30″ S, 64°50′26″ W; 18–19 Aug. 1993; P.F Buhrnhein et al. leg.; Pennsylvania trap; INPA, INPA-PSO 000035.

Description

Male

COLORATION. Head vertex with dark brown dotted spots (Fig. 6C), lateral areas of head entirely light brown (Fig. 6E). Compound eyes black, ocelli hyaline with ochre centripetal crescents. Scapes and pedicels brownish; flagellomeres hyaline. Clypeus with diffuse brownish spots (Fig. 6D); labrum light brown, with light brown labral sclerites (Fig. 7A); labium with prementum, palpi, paraglossa and glossa brown (Fig. 7B), mandibles hyaline with yellowish and brownish ends (Fig. 7C–D), laciniae hyaline with yellowish distal region (Fig. 7E–F). Tergal lobes of meso and metathorax light brown (Fig. 6C), thoracic pleura light brown (Fig. 6B). Forewings with dark brown spot all over anal cell, and almost homogeneous in CuP and M+CuA cells (Fig. 8A–B). Hindwings with homogeneous light brown spots on anal and CuP cells, M+CuA cell filled almost homogeneously by brown spot, with brown veins (Fig. 8C–D). Abdomen light brown (Fig. 6A).

MORPHOLOGY. Head with macrosetae, more concentrated on vertex (Fig. 6D–E); compound eyes large, widely separated, laterally rounded in shape (Fig. 6E); vertex not bilobed, approximately at the same level as upper edge of compound eyes (Fig. 6D). Labium with prementum narrow, labial palpi with round shape, paraglossa with round shape, slender glossa (Fig. 7B). Mandibles asymmetrical, elongate and with outer margin angled (Fig. 7C–D), outer cusp of lacinial tip broad, with six to eight denticles (Fig. 7E–F). Tergal lobes with setae (Fig. 6C). Forewings with many setae, especially on margins; right forewing pterostigma with four crossveins (Fig. 8A); left forewing pterostigma with four crossveinns (Fig. 8B); R1 sinuous (Fig. 8B), M vein before its first bifurcation gently concave, U-shaped (Fig. 8A– B). Hindwing with R 2+3 and R 4+5 almost straight, M sinuous (Fig. 8C–D). Hypandrium with a subquarate shape, with sides slightly sclerotized with abundant setae (Fig. 9A). Process posterior of aedeagal arch long and narrow, with slightly indented external and internal margins; anterior margin of endophallus with U-shaped indentation, originating two areas similar to ‘angels’ wings, extremely membranous, ending posteriorly with six strongly sclerotized and acuminate projections (Fig. 9C). Epiproct with straight posterior margin, with a field of microsetae in medial and distal region (Fig. 9B). Paraproct with broad base, narrowing distally, with a field of microsetae towards outer margin, sensory fields with 25–29 trichobothria on basal rosettes (Fig. 9B).

MEASUREMENTS (in μm). FW: 2818, HW: 2091, IO: 438, D: 266, d: 223, PO: 0.838.