Antilochus (Neaeretus) pterobrachys, Stehlík & Kment, 2011

Stehlík, Jaroslav L. & Kment, Petr, 2011, Antilochus (Neaeretus) pterobrachys sp. nov. and the correct name of the subgenus Afroantilochus (Hemiptera: Heteroptera: Pyrrhocoridae), Acta Entomologica Musei Nationalis Pragae 51 (1), pp. 49-53 : 50-53

Antilochus (Neaeretus) pterobrachys sp. nov.

( Figs. 1–5 )

Type locality. Tanzania, Bagamoyo (75 km north of Dar-es-Salaam at the coast of the Indian Ocean).

Type material. HOLOTYPE: J, ‘Bagamojo’ [handwritten] // J [printed] // ‘ HOLOTYPUS [printed] / Antilochus / pterobrachys [handwritten] / det. STEHLÍK & KMENT 2010 [printed, red label]’ (coll. Moravian Museum, Brno, Czech Republic).

Description. Colouration ( Fig. 1 ). Head, antennomeres (except basal third of antennomere 4), tibiae, tarsi, posterior portion of pronotal collar (between anterior convex parts of callar lobe), callar and pronotal lobes, scutellum, clavus, wide transversal stripe at mid-length of corium, extreme apex of corium, membrane, pleuron I, and dorsal parts of pleura II and III all black. Pronotal collar (except the posterior portion), lateral and posterior pronotal margins, prosternal collar, proximal third of corium, and posterior pleural flanges I, II and III all reddish orange; a large, transversely oval subapical spot extending from anterior margin of corium to membrane whitish orange. Labium, ventral parts of pleura II and III, epicoxal lobes I–III, and trochanters orange red. Femora orange red, distally gradually blackened. Zygosternites, ventral and dorsal laterotergites and mesotergites red. Anterior margin of posterior whitish yellow spot on corium convex anteriorly.

Structure. Anterior portion of pronotal collar slightly gibbous. Callar lobe distinctly gibbous, much longer than flat pronotal lobe. Hemelytra submacropterous, membrane narrow and strongly shortened; membranes of both hemelytrae not overlapping in posterior half. Hind wings crypto-brachypterous.

Pygophore large (width 3.13 mm, length 2.86 mm) ( Figs. 2–4 ). Base of ventral rim, in caudal view, medially arcuatelly elevated. Lateral rim, in lateral view, strongly gibbose towards dorsal rim, but depressed just before joining it ( Fig. 4 ). In dorsal view, lateral walls of pygophore narrowed towards dorsal rim; lateral rim beyond its posterior third rectangularly bent anteriad, lateral rim infolding apparent only behind this right angle and steeply sloping into genital chamber ( Fig. 2 ). Folded part of ventral rim strongly pilose, apically incised, the incision internally emarginated by sharpe edge; lateral rim and lateral rim infolding less pilose ( Fig. 3 ).

Paramere ( Fig. 5 ). Base wide, flat, with shallow round depression on inner side, narrowed towards apex ca. from two-thirds of its length. Apex of paramere sharply emarginated and bent inwards, its tip attenuated and curved downwards ( Figs. 4–5 : arrow a); there is another small spine on outer side of the paramere apex, opposite to the tip (see Fig. 4 : arrow b). Inner side of paramere covered with sparse long sensorial setae.

Puncturation. Anterior margin of pronotal collar without punctures, more posteriorly with small scattered punctures. Pronotal lobe (except posterior margin), scutellum, clavus, and corium with regularly distributed, rather distinct puncturation, punctures of equal size.

Measurements (in mm). Body length 13.23. Head: width (including eyes) 2.16, interocular width 1.13. Lengths of antennomeres: 1 – 2.70, 2 – 3.08, 3 – 2.48, 4 – 3.24. Pronotum: total length 3.19, width 4.59. Scutellum: length 1.94, width 2.11. Corium: length 7.45, width 2.65.

Differential diagnosis. Antilochus (N.) pterobrachys sp. nov. is quite similar to A. (N.) nigrocruciatus in body size, colouration, and tendency to brachyptery. Antilochus (N.) nigrocruciatus , however, differs from A. (N.) pterobrachys sp. nov. in the following characters: antennomere 4 basally without pale ring; pronotal collar completely flat, without puncturation; callar lobe less gibbous, shorter; punctures on pronotal lobe, scutellum, clavus, and corium less distinct; legs black; ventrites and mesotergites anteriorly with white stripes; black transversal stripe on corium wider.

Etymology. Composed from the Greek noun pteron (= wing) and the Greek adjective brachys (= short), referring to the shortened hemelytra and wings of the species.

Distribution. Tanzania.

Figures

Fig. 1. Antilochus (Neaeretus) pterobrachys sp. nov., J holotype. (Photo: L. Dembický).

Figs. 2–5. Antilochus (Neaeretus) pterobrachys sp. nov., J holotype, male genitalia. 2 – pygophore, dorsal view; 3 – pygophore, posterior view; 4 – pygophore, lateral view; 5 – paramere, most exposed view (a – tip of paramere, b – small spine opposite the tip). (Photo: P. Kment).