Zygochrimnus, Brailovsky, Harry, 2017

Brailovsky, Harry, 2017, Zygochrimnushenryi, a new genus and species from South America (Hemiptera, Lygaeoidea, Lygaeidae), ZooKeys 796, pp. 319-324 : 319

Zygochrimnus gen. n. Figure 1B, E, G

Type species.

Zygochrimnus henryi sp. n.

Diagnosis.

Distinguished among New World Lygaeinae by dorsal surface of body densely clothed with long, stout, upright hairs; body subovoid, robust; head dorsally black with yellow discoidal spot at vertex; and pro-, meso-, and metapleuron densely punctate.

Description.

Male. Moderately robust, subovoid, widest across middle of abdomen, medium sized, length less than 5 mm. Head. Sloping downward, wider than long, vertex convex; ocelli much closer to eyes than to each other; ocellus small, slightly raised above surface; eyes hemispheric, not protruding, with posterior margin touching frontal angles of pronotum; buccula moderately produced; rostrum reaching posterior margin of metasternum; rostral segment I thickest, touching anterior border of prosternum; segment II slightly thinner, III and IV thinner than II and about equally thick. Thorax.Pronotum. Trapezoidal, wider than long; anterior border slightly concave; frontal angles gently raised, touching posterior border of eyes; posterior margin straight, with shallow but distinct depression laterally; anterolateral margins slightly sinuate; callus indistinct, defined primarily by punctate areas immediately before and behind; callar impressions unbranched, obliquely sinuate, angled toward frontal pronotal angles; median carina obsolete. Scutellum. Wider than long; median carina T-shaped with stem clearly exposed and arms barely defined; lateral fovea deep. Thoracic pleura. Propleuron divided into three parts by dorsoventral impressions, anterior and posterior parts coarsely punctate, median part impunctate; mesopleuron divided into anterior and posterior punctate parts by shallow impunctate area; metapleuron with anterior half impunctate, posterior half coarsely punctate, posterior border almost straight, and posterolateral angle produced, somewhat rounded; ostiolar peritreme well developed. Legs. Unarmed; femora elongate. Hemelytron. Slightly surpassing apex of abdomen; costal margin barely emarginate; veins slightly raised. Abdomen. Anterolateral scars absent. Genitalia. Genital capsule subcircular in cross section. Paramere with well-developed caudolateral lobe; blade broad; posterior projection conical (Figure 1G).

Surface and Vestiture. Impunctate except for punctures immediately before and behind callus and on pro-, meso- and metapleuron. Head dorsally, pronotum, scutellum, clavus, corium, and legs densely clothed with long, stout, golden, upright hairs; head ventrally, thorax and abdomen densely clothed with short, fine, decumbent, silvery hairs.

Female.

Unknown.

Discussion.

This new genus keys to Melanopleurus and Melanopleuroides in A. Slater (1992) and Henry et al. (2015). The general appearance is similar, with eyes not on stalks; callus not depressed; hemelytral membrane without hyaline apical area; pronotum without four transverse depressions behind calli; scutellum not swollen; pronotal disk convex, finely punctate and almost entirely black to brownish. Melanopleuroides can be distinguished by having the head in dorsal view entirely black without yellowish discoidal spot at vertex; the discoidal spot is clearly defined in the other two genera (Fig. 1A, D). In Zygochrimnus gen. n., the head dorsally, pronotum, scutellum, clavus and corium are densely clothed with long, stout, golden, upright hairs; clavus, corium and abdominal sterna III-V are black with or without yellow to orange marks; and pro- meso-, and metapleuron are densely punctate (Fig. 1B, E); in Melanopleurus the head dorsally, pronotum, scutellum, clavus and corium are clothed with short, fine, decumbent hairs; the clavus, corium and abdominal sternite III-V are entirely bright orange to reddish orange; and the pro-, meso- and metapleuron are impunctate (propleuron sometimes with a few scattered punctures) (Fig. 1C, F).