Neurostigma angelicum, Reategui & Rafael & da Silva-Neto, 2025

Reategui, Natália S., Rafael, José A. & da Silva-Neto, Alberto M., 2025, Neurostigma Enderlein, 1900 (Psocodea: ‘ Psocoptera’: Epipsocidae) from Brazilian Amazon Rainforest: new species and variations in forewings, European Journal of Taxonomy 976, pp. 1-32 : 9

publication ID	https://doi.org/ 10.5852/ejt.2025.976.2771
publication LSID	lsid:zoobank.org:pub:4E810C5C-B478-4CDC-8AD3-9B4E65B518C4
DOI	https://doi.org/10.5281/zenodo.14603827
persistent identifier	https://treatment.plazi.org/id/03AE802C-FFE3-FFA8-FDB5-FEFFA69EF84E
treatment provided by	Plazi
scientific name	Neurostigma angelicum
status	sp. nov.

Treatment

Neurostigma angelicum sp. nov.

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

Figs 6–9 View Fig View Fig View Fig View Fig , 22 View Fig

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 View Fig ) and by having hypandrium almost square in shape, basally wide and distally straight, with slightly sclerotized sides ( Fig. 9A View Fig ).

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 . GoogleMaps

Description

Male

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

MORPHOLOGY. Head with macrosetae, more concentrated on vertex ( Fig. 6D–E View Fig ); compound eyes large, widely separated, laterally rounded in shape ( Fig. 6E View Fig ); vertex not bilobed, approximately at the same level as upper edge of compound eyes ( Fig. 6D View Fig ). Labium with prementum narrow, labial palpi with round shape, paraglossa with round shape, slender glossa ( Fig. 7B View Fig ). Mandibles asymmetrical, elongate and with outer margin angled ( Fig. 7C–D View Fig ), outer cusp of lacinial tip broad, with six to eight denticles ( Fig. 7E–F View Fig ). Tergal lobes with setae ( Fig. 6C View Fig ). Forewings with many setae, especially on margins; right forewing pterostigma with four crossveins ( Fig. 8A View Fig ); left forewing pterostigma with four crossveinns ( Fig. 8B View Fig ); R1 sinuous ( Fig. 8B View Fig ), M vein before its first bifurcation gently concave, U-shaped ( Fig. 8A– B View Fig ). Hindwing with R 2+3 and R 4+5 almost straight, M sinuous ( Fig. 8C–D View Fig ). Hypandrium with a subquarate shape, with sides slightly sclerotized with abundant setae ( Fig. 9A View Fig ). 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 View Fig ). Epiproct with straight posterior margin, with a field of microsetae in medial and distal region ( Fig. 9B View Fig ). 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 View Fig ).