Dycoderus picturatus Uhler

Henry, Thomas & Dellapé, Pablo, 2009, A new genus and species of Oxycarenidae (Hemiptera, Heteroptera, Lygaeoidea) from Argentina, ZooKeys 25 (25), pp. 49-59 : 56-58

Dycoderus picturatus Uhler

Figs 5, 6, 13–18

Dycoderus picturatus Uhler 1901: 508 (orig. descrip.); Slater 1964: 639 (cat.), 1974: 517 (note); Ashlock and A. Slater 1988: 209 (cat.).

Diagnosis. Th is species is best distinguished by the generic characters given above, especially the shape of the pronotum (Fig. 6) and the larger, white maculae (Figs 13, 15, 17) on the corium.

Description. Subbrachypterous lectotype male (Figs 13, 14): Overall coloration yellowish brown to almost reddish brown, with four white maculae on hemelytra. Dorsal surface of head, pronotum, scutellum, explanate costal margin, and wing membrane shiny; corium and clavus dull. Head reddish brown; eyes small, dark brown; ocelli tiny, indistinct, reddish. Labium yellowish brown, segment IV dark brown. Antenna yellowish brown, segment IV and apical half of III dark brown. Pronotum and scutellum reddish brown. Hemelytron largely brown to dark brown with basal third and apex white. Ventral surface brown to reddish brown, abdomen darker brown to fuscous laterally; acetabulae and posterior half of metapleuron white. Ostiolar evaporative area and auricle brown. Legs with femora brown to reddish brown; tibiae pale yellowish brown, slightly darker brown basally and distally.

Head deeply and densely punctate. Pronotum deeply but less densely punctate, posterolateral angles swollen but not tuberculate; scutellum deeply, but more sparsely punctate,

Figures Ι3–Ι8. Dycoderus picturatus Ι3, Ι4 Subbrachypterous lectotype male Ι3 Dorsal aspect Ι4 Lateral aspect Ι5, Ι6 Macropterous male Ι5 Dorsal aspect Ι6 Lateral aspect Ι7, Ι 8 Paralectotype female Ι7 Dorsal aspect Ι8 Lateral aspect.

depressed through middle, apex weakly swollen above level of hemelytra. Hemelytron impunctate except for a few fine punctures on white basal third of corium. Dorsum with scattered, erect, pale setae; setae more dense on head and pronotum than on hemelytron.

Total length 2.58 mm, width 0.99 mm. Head length 0.48 mm, width across eyes 0.62 mm; interocular width 0.42 mm, width between ocelli 0.32 mm. Labium: Total length 1.06 mm; segment I length 0.24 mm, II 0.26 mm, III 0.24 mm, IV 0.32 mm; extending to bases of middle coxae. Antenna: Segment I length 0.30 mm, II 0.45 mm, III 0.29 mm, IV 0.50 mm. Pronotum: Total length 0.69 mm, length of anterior lobe 0.43 mm, length of posterior lobe 0.25 mm, width of anterior lobe 0.66 mm, width of posterior lobe 0.70 mm, width of transverse impression 0.59 mm. Hemelytron length to apex of membrane 1.57 mm, length to apex of corium 1.20 mm.

Macropterous male (Figs 15, 16): Similar to subbrachypterous male but with wings fully developed and membrane extending well beyond apex of abdomen. Length 3.14 mm, width 1.07 mm. Head: Length 0.51 mm, width 0.62 mm, interocular width 0.40 mm; width between ocelli 0.32 mm. Labium: Total length 1.06 mm, length of segment I 0.27 mm, II 0.26 mm, III 0.21 mm, IV 0.32 mm, extending to bases of middle coxae. Antenna: Missing. Pronotum: Total length 0.77 mm, length of anterior lobe 0.42 mm, length of posterior lobe 0.35 mm, width of anterior lobe 0.69 mm, width of posterior lobe 0.91 mm, width of transverse impression 0.66 mm. Hemelytron length to apex of membrane 2.20 mm, length to apex of corium 1.40 mm.

Subbrachypterous paralectotype female (Figs 17, 18): Similar to subbrachypterous lectotype male in shape, size, and coloration. Length 3.01 mm, width 1.20 mm. Head: Length 0.45 mm, width across eyes 0.72 mm; interocular width 0.50 mm. Labium: Total length 1.10 mm, length of segment I 0.27 mm, II 0.32 mm, III 0.26 mm, IV 0.35 mm; extending to bases of middle coxae. Antenna: Length of segment I 0.26, II 0.40 mm, III 0.27 mm, IV 0.46 mm. Pronotum length 0.72 mm, length of anterior lobe 0.46 mm, width of anterior lobe 0.75 mm, length of posterior lobe 0.26 mm, width of posterior lobe 0.82 mm. Hemelytron length to apex of membrane 1.89 mm, length to apex of corium 1.33 mm.

Distribution. Reported and known only from Arizona and Colorado in the Unit- ed States (Ashlock and A. Slater 1988).

Discussion. Th is species is most similar to Notocoderus argentinus in overall appearance, but can be distinguished by the presence of ocelli, the subequally wide pronotal lobes, the lack of a tubercle on each posterolateral angle of the posterior lobe, and the larger white maculae on the corium.

Type material examined. Lectotype. Male. (here designated to preserve nomenclatural stability): label 1, “Phoenix, Ariz, 5.97”; label 2, “Type”; label 3, “Remounted 1 Feb. 2008 ” ( USNM) . Paralectotypes: 1 female, same data as for lectotype ( USNM) ; 1 female [head, pronotum, right hemelytron, and all legs missing], “Col.,” “ Dycoderus picturatus Uhler ” (in Uhler’s hand), “P. R. Uhler collection.,” “ Dycoderus picturatus Uhl. Lectotype (?), Det. H. G. Barber ” ( USNM) .

Other specimens examined. 1 female, West Cliff , Colo. [? City] ; Dycoderus picturatus Uhler det. H. G. Barber ( USNM); 1 male, Garland, Col., 22 – 6, Hubbard & Schwarz ( USNM) ; 2 females, Custer Co., Col., Aug., T. D. A. Cockerell ( USNM) .

Acknowledgments

Partial support (to PMD) for this work was provided by CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina). We thank David A. Nickle (Systematic Entomology Laboratory [SEL], ARS, USDA, c/o National Museum of Natural History, Washington, DC, USA), Michael G. Pogue ( SEL), and Luis Cervantes Peredo (Instituto de Ecología, Xalapa, Veracruz, Mexico) for kindly reviewing the manuscript and offering suggestions for its improvement.