Dycoderus Uhler, 1901

Henry, Thomas & Dellapé, Pablo, 2009, A new genus and species of Oxycarenidae (Hemiptera, Heteroptera, Lygaeoidea) from Argentina, ZooKeys 25 (25), pp. 49-59 : 55-56

Dycoderus Uhler

Dycoderus Uhler 1901: 507 . Type species: Dycoderus picturatus Uhler, 1901 . Monotypic.

Diagnosis. Dycoderus is distinguished by the coarsely punctate head, pronotum, and scutellum; the bilobed pronotum with lobes separated by a moderately shallow transverse impression, the weakly convex anterior lobe, and the shorter and slightly narrower posterior lobe; the brown hemelytron with the basal third and apex white; the moderately large ostiolar auricle extended up and outward into a tuberclelike spout; and the swollen fore femur, armed below with a large, stout spine on the distal third.

Description. Total length of subbrachypterous male 2.58 mm; length of macropterous male 3.14 mm; length of subbrachypterous female: 3.01 mm. Head, pronotum and scutellum coarsely punctate; hemelytral punctures finer and smaller. Dorsal surface with scattered, erect setae. Head globose; bucculae large and prominent occupying three fourths of the total length of ventral surface, extending posteriorly to about midlevel of eye, encompassing all of first rostral segment and basal half of second. Eyes small; ocelli tiny, reddish, set near inner margin of each eye. Pronotum bilobed, lobes separated by a relatively shallow transverse impression, anterior lobe subquadrangular, weakly convex, slightly wider and about 1.7 times longer than posterior lobe. Scutellum subequalateral, with basal width slightly greater than length, basal half flattened, apex swollen above level of hemelytra. Hemelytron ranging from subbrachypterous (convex with a shell like membrane) to fully macropterous; corial margin narrowly explanate, with a row of shallow punctures along inner margin; membrane ranging from abbreviated, lacking veins, and extending only to apex of abdomen to fully developed with indistinct veins and extending beyond apex of abdomen by half its length. Proportionate length of corium to length of membrane 1.44. Ostiolar auricle elongate, extended upward and outward, forming a short, stout, tuberculate spout; evaporative area covering about half of metapleuron. Metacoxae widely separated. Fore femora moderately incrassate, armed below on distal third with a relatively large spine. Abdomen broad, abdominal sterna III to VI fused, posterior margin of sternites VII and VIII in males with two transverse combs of glandular setae on either side of median line.

Discussion. Dycoderus is similar to Notocoderus , but differs in the subequally wide pronotal lobes, with a more shallow transverse impression separating them, the lack of posterolateral tubercles on the posterior lobe, the shorter ostiolar tubercle (less visible from dorsal aspect), and the much larger white macula on the basal third of the corium.