Cuyonysius flavidus Dellapé and, 2020

Dellapé, Pablo M., Henry, Thomas J. & Pmd, 2020, A New Genus And Species Of Orsillinae (Heteroptera: Lygaeoidea: Lygaeidae) From Argentina, Proceedings of the Entomological Society of Washington 122 (1), pp. 55-62 : 58-60

Cuyonysius flavidus Dellapé and

Henry, new species

http://zoobank.org/80b30c3b-d2bf-

43a9-a7db-5854812f9b2b

http://lsid.speciesfile.org/urn:lsid: Lygaeoidea.speciesfile.org: TaxonName:507253

( Figs. 1-13 )

Description.— Male ( Figs. 1, 2 ): Head, pronotum, and scutellum densely punctate, punctures on head less evident and smaller than those on pronotum and scutellum. Scutellum with an impunctate and elevated Y-shaped carina. First labial segment not exceeding buccula, second segment extending to procoxae. Hemelytron clearly exceeding abdomen, claval commissure barely shorter than scutellum. Legs with abundant short semierect setae, somewhat longer on metatibiae. General coloration pale brown to yellowish. Head pale brown, bucculae paler, with the following areas dark: two dorsal stripes extending dorsally from maxillar plate to base of head and surrounding the ocelli, the areas behind the eyes, a spot laterally on antennal tubercles, and base of head adjacent to bucculae. Antennae pale yellow, scape spotted dorsally and ventrally, the base and a subdistal ring on the pedicel, base of basiflagellomere and distiflagellomere darker. Labium pale brown with segment IV darker. Pronotum pale yellow, with callar area pale brown. Scutellum pale brown, base in front of the Y-shaped elevation darker. Hemelytra pale yellow, with two dark spots on corium, one small and rounded on apical margin of corium inside intersection with Cu vein, and the other more elongate on membrane, contiguous to apical margin of corium and between M and R veins. Membrane pale translucent with diffuse darker areas. Pleura with dark areas ( Fig. 2 ). Acetabulae pale. Auricle pale yellow, evaporative area extending to most of metapisternum and a fringe of mesepimeron, except dorsal one quarter or less, pale yellow with central area pale brown intermixed with dark punctures. Sterna dark. Legs pale yellow, pro- and mesofemur spotted externally, metafemur with spots on inner and outer side. Abdomen dark with dorsal margin of sternites pale brown, sternite IV with two diffuse pale brown spots posteroventrally on either side of midline, sternites V to VII pale brown posteroventrally. Pygophore dark with a pale brown fringe dorsally. Dorsal aperture elongated, with lateral margins slightly sinuous, and with a deep concavity posteriorly accompanying the posterior projection of pygophore ( Figs. 4–6 ). Parameres gently curved, with a basal projection ( Figs. 7–10 ). Aedeagus with the distal conjunctival pigmented area continued by two lobes, one single and one large and trilobed. Distal part of vesica inflated, with a pair of short lobes directed anteriorly ( Figs. 11–13 ).

Female ( Fig. 3 ): Similar to male, with the abdomen pale brown with dark areas restricted to sternites II and III ventrally and laterally on sternites III to VI.

Measurements.— Male (n = 5; holotype measurements in parentheses): Length 4.50–4.75 mm (4.95 mm), width across widest area of hemelytra 1.65– 1.71 mm (1.73 mm). Head: Width across eyes 0.98–1.02 mm (1.01 mm), interocular width 0.66–0.67 mm (0.67 mm). Labium: Length 1.60–1.68 mm (1.66 mm). Antenna: Scape, length 0.30–0.35 mm (0.37 mm); pedicel, 0.69–0.72 mm (0.70 mm); basiflagellomere, 0.48– 0.51 mm (0.48 mm); distiflagellomere, 0.56–0.64 mm (0.54 mm). Pronotum: Median length 0.85–0.91mm (0.91mm), posterior width 1.38–1.41mm (1.41 mm).

Female (n = 5): Length 4.85–5.05 mm, width across widest area of hemelytra 1.78–1.82 mm. Head: Width across eyes 0.99–1.06 mm, interocular width 0.67–0.72; mm. Labium: Length 1.71–1.79 mm. Antenna: Scape, length 0.37–0.38 mm; pedicel, 0.70–0.74 mm; basiflagellomere, 0.45–0.50 mm; distiflagellomere, 0.53–0.59 mm. Pronotum: Median length 0.94–0.99 mm, posterior width 1.49–1.55 mm.

Type material.— Holotype male, Las Flores, San Juan Province, 5/I/96, leg A. Ugarte-P. ( USNM) . Paratypes: 5 males, 9 females, Las Flores, S[a]n Juan , Argentina, 20 Jan. 1995, leg. L. E. Peña G. (2 males, 2 females MLP ; remainder in USNM;) ; 12 males, 26 females, Las Flores, San Juan Province , 5/I/96, leg A. Ugarte-P. (4 males, 4 females MLP ; remainder in USNM).

Etymology.—The specific epithet is from the Latin flavidus , meaning yellowish, and refers to the general coloration of this species.

Figures

Figs. 1–3. Cuyonysius flavidus, n. gen. and n. sp. 1, Male, dorsal view 2, Male, lateral view. 3, Female, dorsal view.

Figs. 4–13. Cuyonysius flavidus, n. gen. and n. sp., male genitalia. 4–6: Pygophore (Scale bar 0.5 mm). 4, Dorsal view. 5, Posterodorsal view. 6, Lateral view. 7–10: Right paramere (Scale bar 0.25 mm). 7, Dorsal view. 8, Inner view. 9, Ventral view. 10, Outer view. 11–13: Aedeagus (Scale bar 0.5 mm). 11, Posterolateral view. 12, Anterolateral view. 13, Lateral view.