Xenocaucus uluguru, Weirauch & Forthman & Grebennikov & Baňař, 2017

Weirauch, C., Forthman, M., Grebennikov, V. & Baňař, P., 2017, From Eastern Arc Mountains to extreme sexual dimorphism: systematics of the enigmatic assassin bug genus Xenocaucus (Hemiptera: Reduviidae: Tribelocephalinae), Organisms Diversity & Evolution (New York, N. Y.) 17 (2), pp. 421-445 : 441

Xenocaucus uluguru , n. sp.

Figures 4 , 5 , 6 , and 10.

Diagnosis Female: recognized by the medium size (∼ 2.9 mm), the distinct lateral setal tufts on the head ( Figs. 3 and 6 ), the slightly raised and transversally elongate pronotal disk, the pronotum longer than the mesonotum ( Fig. 3 ; ratio 1.5), the intersegmental membranes between tergites 3 and 4 slightly curved caudad and between segments 7 and 8 straight ( Fig. 3 ), and mediotergites 1/2 and 3 glabrous ( Fig. 3 ).

Description Female: total length 2.95 mm, total length: greatest abdominal width 1.9; wing condition and general vestiture as in generic description. Coloration: uniformly yellowish brown to reddish brown. Structure: head: about as long as wide in dorsal view, with very small anteocular area, glabrous area on vertex circular, longitudinal sulcus extending about 1/2 of glabrous area, tuft distinct, lateral fringes longer laterally than around posterior half of head. Antenna: scape length: head length ratio1.5, moderately slender. Labium: first visible segment: head length 0.9. Thorax: transverse suture between pronotum and mesonotum distinct, pronotal disk slightly raised and transversally elongate, pronotum longer than mesonotum (ratio 1.3), greatest pronotal width: pronotal length 1.3. Legs: foretrochanter without ventral process, forefemur length: body length 0.3, forefemur fairly slender. Abdomen: slightly longer than wide, length: width 1.2, intersegmental membrane between tergites 3 and 4 slightly curved caudad, intersegmental membrane between tergites 6 and 7 slightly curved anteriad, intersegmental membrane between tergites 7 and 8 straight, mediotergites 1/2 and 3 with sparse setae, setae on lateral margin of dorsal laterotergites moderately long, setae dorsally on dorsal laterotergites short. Genitalia: as in generic description.

Male: unknown.

Etymology: named for the holotype locality, Uluguru Mts. in Tanzania.

Material examined: holotype: Tanzania Uluguru Mts. at Tchenzema vil., 7.11222° S, 37.60444° E, 2258 m, 13 Nov 2010, V. Grebennikov, 1;female (00117767) ( CNC) . Other specimens examined: Tanzania : Uluguru Mts. at Tchenzema vil., 7.11222° S, 37.60444° E, 2258 m, 13 Nov. 2010, V. Grebennikov, 1;juvenile (00117763) ( CNC) .

Figures

Fig. 4 Dorsal habitus of X. rubeho, n. sp., (female), the female holotype as well as one female and one unsexed immature (both from Uluguru) of X. schoutedeni, X. uluguru, n. sp., (female), and one immature (unsexed)

Fig. 5 Lateral habitus of females of the seven East African species of Xenocaucus and the male of X. ethiopiensis. fl flagellomeres, lb1–3 first, second, and third visible labia segments, om ommatidium, pd pedicel; scale bars, 1 mm

Fig. 6 Ventral habitus of the seven East African species of Xenocaucus and the male of X. ethiopiensis; abbreviation: vptr, ventral process on trochanter

Fig. 3 Dorsal habitus of X. chomensis, n. sp., (female, unsexed immature, and male immature), X. ethiopiensis, n. sp., (male holotype and female), X. kimbozensis, n. sp., (female, unsexed immature, and male immature), the female holotype of X. mancinii, and X. nguru, n. sp., (female, unsexed immature, and male immature). dld setae dorsally