Neurostigma, Enderlein, 1900

González-Obando, Ranulfo, Carrejo-Gironza, Nancy, Mendivil-Nieto, Julián & Aldrete, Alfonso Neri García, 2021, Neurostigma (Psocodea: Psocomorpha: Epipsocidae) from Colombia: new species and an identification key, Acta Entomologica Musei Nationalis Pragae 61 (1), pp. 83-98 : 92-95

Key to males of Neurostigma

Modified from Mൾඇൽංඏංඅ-Nංൾඍඈ et al. (2020). Neurostigma chaetocephalum , N. furcivenula and N. roesleri are not included because their male genitalia are unknown.

1 Forewing with areola postica fused with M; pterostigma with seven or more crossveins ( Figs 31, 32 ). Distal process of the aedeagal arch very wide, trapezoidal ( Fig. 38 ). .......................................................................... 2

– Forewing with areola postica free, not fused with M; pterostigma with 2–7 crossveins ( Figs 1 , 7 , 13 ). Distal process of the aedeagal arch variable ( Figs 6 , 12 , 18 , 24 , 30 ). ............................................................................ 3

2 Radular sclerites with small denticles, more pronounced in midline ( Fig. 38 ). Vertex narrow, raised and distinctly emarginate in the middle. Proximal half of forewing yellowish to brown, with large dark brown spots and hyaline basal area, basal crossveins of pterostigma pigmented at the wing margin ( Fig. 31 ). ...... ......................................... N. xanthopterum New, 1980

– Radular sclerites weakly developed. Vertex not as above. Proximal half of forewing dark brown; basal crossveins of pterostigma not pigmented at the wing margin ( Fig. 32 ). ................... N. enderleini New, 1980

3 Forewing vein R 2+3 strongly sinuous, more than four times the length of Rs section distal to transverse vein r–m ( Figs 7 , 25 ). ............................................................ 4

– Forewing vein R 2+3 weakly or strongly sinuous, but less than four times the length of Rs section distal to r–m ( Figs 1 , 13 , 19 ). ............................................................... 5

4 Posterior process of aedeagus moderately broad, apex rounded ( Fig. 12 ). Pterostigma with five crossveins; apex of areola postica rounded ( Fig. 7 ). ........................ ...................................................... N. mockfordi sp. nov.

– Posterior process of aedeagus elongate, narrow, distally truncate ( Fig. 30 ). Pterostigma with seven crossveins; areola postica slanted posteriorly, apex acute ( Fig. 25 ). ................................................ N. valderramae sp. nov.

5 Distal process of the aedeagal arch wide, short, broadly rounded apically. Radular sclerites well developed. .... ........................................... N. dispositum Roesler, 1940

– Distal process of the aedeagal arch different. Radular sclerites with spicules or spines. .................................. 6

6 Pterostigma with 2–3 crossveins ( Fig. 33 ). Vertex almost at the same level as the upper border of compound eyes. Aedeagus with elongate, slender, distally rounded posterior process; radula with rows of sclerotized denticles ( Fig. 37 ). ................................................... .......................................... N. paucivenosum New, 1980

– Pterostigma with 4–7 crossveins ( Figs 1 , 19 ). Vertex above the upper border of compound eyes ( Figs 3 , 15 , 21 ). Posterior process of the aedeagus variable, short or long, slender or stout, distally round, truncate or acuminate; radula with or without spicules or large spines ( Figs 6 , 18 , 24 ). ................................................... 7

Figures

Figs 31–38. Forewings and phallosomes of Neurostigma spp. 31, 38 – N. xanthopterum New, 1980; 32 – N. enderleini New, 1980; 33, 37 – N. paucivenosum New, 1980 (redrawn from Nൾඐ 1980: figs 52, 53); 34, 36 – N. garcialdretei Mendivil et al., 2020; 35 – N. radiatum Mockford, 1991 (redrawn from Mඈർĸൿඈඋൽ 1991: fig. 134).

Figs 1–6. Neurostigma lienhardi sp. nov., male. 1 – forewing; 2 – hindwing; 3 – head, frontal view; 4 – epiproct and right paraproct; 5 – hypandrium; 6 – phallosome. Values for scale bars in mm.

Figs 7–12. Neurostigma mockfordi sp. nov., male. 7 – forewing; 8 – hindwing; 9 – head, frontal view; 10 – left paraproct and epiproct; 11 – hypandrium; 12 – phallosome. Values for scale bars in mm.

Figs 13–18. Neurostigma newi sp. nov., male. 13 – forewing; 14 – hindwing; 15 – head, frontal view; 16 – left paraproct and epiproct; 17 – hypandrium; 18 – phallosome. Values for scale bars in mm.

Figs 19–24. Neurostigma thorntoni sp. nov., male. 19 – forewing; 20 – hindwing; 21 – head, frontal view; 22 – epiproct and right paraproct; 23 – hypandrium; 24 – phallosome. Values for scale bars in mm.

Figs 25–30. Neurostigma valderramae sp. nov., male. 25 – forewing; 26 – hindwing; 27 – head, frontal view; 28 – left paraproct and epiproct; 29 – hypandrium; 30 – phallosome. Values for scale bars in mm.