Guilbertocoris, Brailovsky & Barrera, 2016

Brailovsky, Harry & Barrera, Ernesto, 2016, New taxa of Neotropical Acanthocerini (Hemiptera: Heteroptera: Coreidae), Acta Entomologica Musei Nationalis Pragae 56 (2), pp. 547-555 : 548-550

Guilbertocoris gen. nov.

Type species. Guilbertocoris guianensis sp. nov., here designated.

Description. Body elongate ( Fig. 1 ), relatively narrow, medium-sized, less than 20 mm long.

Head wider than long, nearly quadrate with the specimen in dorsal view; dorsal surface finely granulate; tylus slightly projecting beyond juga; antenniferous tubercle prominent, projecting distinctly anteriorly of tylus, widely separated, armed laterally with a stout prominent spine; antennae relatively long, slender; antennal segment I cylindrical, slightly curved, more than three times as long as head; segments II–III cylindrical, IV fusiform; antennal segment I the longest, III the shortest, and IV longer than II; preocellar pit deep; ocelli close to eyes, on hypothetical line drawn between posterior borders of eyes; ocellar tubercle protuberant, conspicuously raised; eyes protruding, widely hemispherical, in lateral view globose, with upper margin located slightly above level of frons and vertex; postocular tubercle exposed, granulate; head in dorsal view with short longitudinal sulcus restricted to middle third of frons; bucculae short, subtriangular, with anterior angle elongate, subacute, not extending beyond middle third of eyes, meeting posteriorly and closed; rostrum reaching middle third of mesosternum; rostral segment I stout, reaching posterior third of head.

Thorax. Pronotum wider than long, slightly declivent, densely punctate; collar distinct; anterior, posterior, and posterolateral margins smooth; anterolateral margins smooth, except anterior third finely crenulate; humeral angles expanded laterally into short, stout spine; triangular process absent; calli convex, barely raised above pronotal disk, smooth; anterior angle rounded. Scutellum longer than wide; transversely striate; apex subacute. Mesosternum with light, almost obsolete longitudinal mesial depression; metasternum flat, smooth; metathoracic scent gland auricle closer to ventral margin of metapleuron, bilobed; anterior lobe more developed than posterior lobe; metapleuron lacking lateral process.

Legs. Fore and middle femora ventrally armed with one row of stout spines; hind femur incrassate, curved, dorsally finely tuberculate, and ventrally armed with double row of stout, large, and acute spines; fore femur almost twice as long as head; middle femur reaching posterior border of abdominal sternite III; hind femur reaching or slightly extending beyond abdominal sternite V; tibiae sulcate; hind tibiae flattened, curved, inner face armed with one row of stout acute spines.

Hemelytra. Macropterous, extending beyond apex of last abdominal segment; clavus and corium densely punctate.

Abdomen. Posterior angle of connexival segments VI–VII with very short spine; abdominal spiracles closer to lateral than to anterior margin.

Male genital capsule. Posteroventral edge with short expansion near midline; lateral angles straight ( Fig. 6 ). Paramere short, elongate and apically subacute ( Figs 13–14 ).

Etymology. Named after Eric Guilbert, distinguished French heteropterist and curator of the MNHN.

Differential diagnosis. Guilbertocoris gen. nov. ( Fig. 1 ), appears to be related to Moronopelios Brailovsky, 1988 ( Figs 2–5 ) in having the antenniferous tubercles laterally armed with a spine, body length between 19 to 22 mm, humeral angles sharply angulate, antennal segment III cylindrical, not dilated, fore and middle femora ventrally armed, and hind femur dorsally barely tuberculate and ventrally armed with double row of stout, large and acute spines.

In Moronopelios the antennal segment IV is the longest; eyes in lateral view are not conspicuosly globose; postocular tubercle rounded, forming a smooth contour with eye; head dorsally with deep and large sulcus extending from frons to vertex; pronotum conspicuously declivent with anterolateral margin densely tuberculate and spinose; calli raised above pronotal disk and densely tuberculate; anterior angle exposed, tuberculate to spinose; fore femur more than twice as long as head; middle femur reaching posterior border of abdominal sternite IV; and hind femur reaching base of genital capsule.

In Guilbertocoris the antennal segment I is the longest; eyes in lateral view are protruding, globose; postocular tubercle exposed, granulate; head in dorsal view with short sulcus restricted to middle third of frons; pronotum slightly declivent with anterolateral margins smooth, except for barely crenulate anterior third; calli barely raised above pronotal disk, smooth; anterior angle rounded, not tuberculate or spinose; fore femur almost twice as long as head; middle femur reaching posterior border of abdominal sternite III; hind femur reaching or slightly extending beyond abdominal sternite V.

Figures

Figs 1–5. Habitus in dorsal view. 1 – Guilbertocoris guianensis gen. & sp. nov., 2 – Moronopelios flavoantennatus sp. nov., 3 – M. nigritus sp. nov., 4 – M. polystoides Brailovsky, 1988, 5 – M. vespiformis Brailovsky, 1988.

Figs 6–14. 6–8 – male genital capsule, caudal view: 6 – Guilbertocoris guianensis gen. & sp. nov., 7 – Moronopelios nigritus sp. nov., 8 – M. polystoides Brailovsky, 1988. 9–14 – paramere: 9–10 – M. nigritus sp. nov., 11–12 – M. polystoides, 13–14 – G. guianensis gen. & sp. nov.