Neolargulus, Stehlík & Brailovsky, 2011

Stehlík, Jaroslav L. & Brailovsky, Harry, 2011, Two new genera of the tribe Largulini (Hemiptera: Heteroptera: Largidae) from Greater Antilles, Acta Entomologica Musei Nationalis Pragae 51 (2), pp. 449-456 : 450-451

Neolargulus gen. nov.

Type species. Neolargulus excavatus sp. nov., here designated.

Description. Body oblong, relatively small, wide, parallel-sided.

Head rather short but wide, somewhat inclined; frons and vertex slightly raised; eyes simple, barely pedunculate, pointing more anteriad than laterad; temple prominent, strongly rounded laterally. Bucculae low, short, scarcely extended backwards as far as the antenniferous tubercles, and apically rounded. Rostrum reaching anterior border of metasternum. Antennomere 4 longest and stoutest, slightly deflected.

Thorax. Pronotum. Pronotal collar wide; anterior angles obtuse, rounded; callar (= anterior pronotal) lobe slightly shorter and weakly raised above posterior pronotal lobe and distinctly detached from the latter; lateral margins of pronotum carinate, narrowing anteriorly, rather wide at dividing line of callar and pronotal lobe, well developed nearly up to the posterior pronotal margin; humeral angles rounded, not exposed. Legs. Fore femur thickened, with one or two spines apically; middle and hind femora unarmed. Hemelytra. Macropterous; costal margin of corium sinuate, apical margin straight, apical angle subacute; hemelytral membrane nearly reaching (J) to slightly extending (♀) beyond the apex of last abdominal segment.

Abdomen. Parallel, not dilated. Pygophore ( Figs. 7–8 , 16 ). Ventral rim roundly concave, narrow; lateral rim in the portion connected to ventral rim strongly widened, rounded, declining and distally nearly fading towards the dorsal rim, so the lateral wall in dorsal third continually verges into simple round dorsal margin ( Fig. 7 ). Lateral rim infolding visible anteriad to the thickened portion of lateral rim, horizontal, dish-shaped. Paramere bending anteriad in the level of thickened portion of lateral rim, its apical part very long, slender, and pointed ( Figs. 7–8 ).

Differential diagnosis. Neolargulus gen. nov. differs from all other genera of Largulini by its gibbose callar lobe that is distinctly detached from the posterior pronotal lobe, the carinate lateral margins of the pronotum, and the different structure of the pygophore. See also the key below.

Etymology. Composed from the Greek adjective neos (= new) and the generic name Largulus ; gender masculine.

Figures

Figs. 7–14. 7–8 – Neolargulus excavatus gen. & sp. nov., holotype, pygophore (7 – caudal view, 8 – lateral view); 9–11 – Armilargulus elongatus Stehlík & Jindra, 2007, holotype, pygophore (9 – caudal view, 10 – anterodorsal view, 11 – lateral view); 12–14 – Largulus parallelus Hussey, 1927: 12–13 – pygophore (12 – caudal view, 13 – lateral view); 14 – paramere. (Photo: P. Kment).Abbreviations: o – opening in the ventral wall; p – paramere; pm – parandrium; vr – ventral rim of the pygophore.

Figs. 15–17. Pygophore in caudal view. 15 – Paralargulus refulgens (Brailovsky & Barrera, 2008); 16 – Neolargulus excavatuss gen. & sp. nov.; 17 – Largulus parallelus Hussey, 1927. (Figs. 15, 17 from BRAILOVSKY & BARRERA 2008).