Stenoscelidea Westwood, 1842: 18

Brailovsky, Harry & Barrera, Ernesto, 2012, Review of the Stenoscelidea complex and key to the known genera of Stenoscelideini (Hemiptera: Heteroptera: Coreidae), Acta Entomologica Musei Nationalis Pragae (suppl.) 52 (2), pp. 355-370 : 357-361

Stenoscelidea Westwood, 1842: 18

Stenoscelidea Westwood, 1842: 18 Stenoscelidea: PACKAUSKAS (2010) : 205 (catalogue).

Type species. Stenoscelidea albovaria Westwood, 1842: 18 (subsequent designation by KIRKALDY (1903)).

Redescription. Head wider than long, quadrate, non-declivent, dorsally flat, parallel-sided in front of eyes; clypeus extending as short tubercle, slightly rounded at tip, wider at apical third, surpassing antenniferous tubercle by about a third, base much lower than antenniferous tubercle; juga not visible from above, apically globose, deflexed below antenniferous tubercle; antenniferous tubercle short, unarmed, nearly parallel, oblique at apex, apex directed inwards; distance between antenniferous tubercle subequal to width of one tubercle; postclypeal sulcus deep, with a slight ridge running through it longitudinally, forming two sulci, or postclypeal sulcus deep, simple, without ridge at middle third; antennae longer than total body length; antennal segment I stouter than segments II to IV, slightly curved outward, longer than maximal length of head; segments II and III cylindrical, moderately slender and IV fusiform, elongate; antennal segment IV the longest, I the shortest, and II longer than III; antennal segment IV not longer than II and III together; ocellar tubercle large, raised; ocelli close to eyes; preocellar pit deep; eyes medium-sized, hemispherical, protuberant; postocular tubercle slightly exposed, nearly indistinct; bucculae nearly semicircular, short, elevated, unarmed, not projecting beyond middle of eye; rostrum reaching posterior third of mesosternum, or anterior border of metasternum; rostral segment IV the longest, III the shortest, and I and II subequal; rostral segment I not extending past head or reaching anterior border of prosternum.

Thorax. Pronotum wider than long across humeral angles, trapezoidal, declivent, with distinct collar; frontal angles blunt, convex; anterior, anterolateral, posterolateral and posterior borders smooth, never tuberculate-spinose; humeral angles rounded, obtuse, gently exposed, with or without tiny spine; triangular process absent; anterior lobe impunctate; posterior lobe heavily punctate, not tuberculate; callar region raised, impunctate; prosternum deeply concave; mesosternum slightly sulcate, or difficult to see that sulcus, not forming raised tubercle anteriorly between procoxae; metasternum gently sulcate; metapleural supracoxal spine absent; metathoracic scent gland peritreme with two separate lobes, ostiole directed laterally; anterior lobe auriculate, posterior lobe small, digitiform to acute.

Legs. Femora slender, never incrassate in either sex, ventrally armed with two subapical spines and one row of short and stout spines, dorsally smooth; hind femur in both sexes exceeding apex of last abdominal segment; fore and middle tibiae cylindrical, sulcate, unarmed, their outer surface eventually tiny expanded; hind tibiae with foliaceous expansions, wide in females, more narrow in males; inner expansion smooth, outer expansion scalloped; inner and outer surface of hind tibiae not spined or hind tibiae in either sex narrowly expanded or not expanded ( Figs. 5–16 ).

Scutellum longer than wide or nearly equilateral; triangular, with apex subacute; scutellar disk flat.

Hemelytra. Macropterous, extending beyond apex of abdomen; apical margin of corium slightly sinuate, its apical angle extending beyond middle third of membrane; costal margin emarginate.

Abdomen. Connexival segments raised above terga; posterior angle unarmed, never spined postero-apically; upper border of connexiva with few tubercles along the entire edge; abdominal spiracles circular; abdominal spiracles IV to VI closer to posterior third and spiracles III and VII closer to anterior third of abdomen; abdominal sterna without medial furrow.

Male genitalia. Posteroventral edge of genital capsule gently concave or with short V-shaped concavity or variable through the species; posterolateral angles rounded.

Female genitalia. Abdominal sternite VII with fissure covering the total length of the sternite; plica not visible; gonocoxae I quadrate, inner margin overlapping, upper and outer margins obliquely straight; paratergite VIII large, rectangular to quadrate with visible spiracle; paratergite IX longer than VIII, quadrangular.

Color. Head with neck always transversely black; pronotal disk and scutellar disk without yellowish orange to dark yellow longitudinal medial stripe; corial veins not entirely yellow; body surface never metallic and without bluish or green iridescence.

Integument. Pro-, meso-, and metapleura almost impunctate, except the posterior margin with finest punctuation.

Figures

Figs. 1–16. Hind leg. 1–2 – Stenoeurilla aenescens (Stål, 1870); 2 – S. maya (Brailovsky, 1983); 3 – Plaxiscelis pagana (Burmeister, 1835); 4 – Nyttum punctatum (Dallas, 1852); 5 – Stenoscelidea albovaria Westwood, 1842; 6–7 – S. blotei Brailovsky & Barrera, 1996; 8 – S. hilaris Breddin, 1903; 9 – S. saphes sp. nov.; 10 – S. morona Brailovsky & Barrera, 1996; 11 – S. t-nigra (Costa, 1863); 12 – S. pucalpa sp. nov.; 13 – S. roraima Brailovsky & Barrera, 1996; 14–15 – S. rubra Montandon, 1895; 16 – S. tibialis Brailovsky & Barrera, 1996.