Oncerotrachelus paraconformis, Gil-Santana, Hélcio R., 2013

Gil-Santana, Hélcio R., 2013, Two new species of Oncerotrachelus Stål (Hemiptera: Heteroptera: Reduviidae: Saicinae), from Amazonas, Brazil, with taxonomical notes, Zootaxa 3626 (2), pp. 268-278 : 274-276

Oncerotrachelus paraconformis sp. nov.

Description. Male (Figs. 27–36). Dimensions (in mm): HOLOTYPE: Total length: to tip of abdomen: 4.6; to tip of forewings: 4.8; head length: 0.7; antennal segments: I: 1.75; II: 1.2; III: 0.9; IV: 0.8; rostral segments: I: 0.6; II: 0.2; III: 0.2. Thorax: pronotum: fore lobe length: 0.3; hind lobe: length: 0.35; width at posterior margin: 0.9. Legs: prolegs: coxa: 0.5; femur: 1.4; tibia: 1.3; tarsus: 0.4; middle legs: femur: 1.5; tibia: 1.7; tarsus: 0.35; hind legs: femur: 2.2; tibia: 3.0; tarsus: 0.35. Abdomen: length: 2.4. General color yellowish brown to testaceous; integument shiny with numerous, long and short golden and yellowish hairs (Figs. 27, 30). HEAD (Figs. 27–28, 30): darkened on dorsal portion of inter-ocular and post-ocular areas, with numerous long, erect or curved hairs, less numerous on interocular space; rounded tubercle with several stiff setae located anteroventrally between antennal insertion and apex of head; stiff bristles implanted laterally on post-ocular area as well; transverse sulcus deep, reaching eyes at hind margin; post-ocular region subglobose; inter-ocular distance about 0.78 times the width of an eye; eyes globose in dorsal view (Fig. 27), occupying dorso-ventral height of head in lateral view; antennal segments slender; segment I clothed with long, fine projecting hairs beside short fine hairs (Fig. 28); length of longer ciliated hairs of first antennal segment approximately 3.5 times width of segment; segment II with long ciliated hairs, more numerous and longer on basal two-thirds, in whose longer elements approximately 3.5 times width of segment. Rostrum: stiff hairs on upper surface of segments and sparse short fine hairs on ventral and lateral faces and some longer hairs on first segment; segment I elongated, thinner at basal portion, reaching distal portion of post-ocular ventral area; segment II moderately swollen; segment III slender, tapering. THORAX (Figs. 27, 29–30): darkened, with fore acetabula, humeral angles, spine and distal half of scutellum brighter to yellowish; anterolateral angles rounded in dorsal view; prothorax divided by a furrow between anterior and posterior lobes of pronotum, this shallower on median portion (Fig. 27); median longitudinal sulcus relatively broad, much deeper on anterior lobe, not reaching hind margin of posterior lobe (Fig. 27); anterior lobe with pair of oblique shallow sulci; integument of both lobes of pronotum very finely rugose; humeral angles rounded with prominent and somewhat curved spine, with acute apex (Fig. 29); with lateral shallow and straight ridge on anterior lobe; fore acetabula prominent, divided by a sulcus; Scutellum long, triangular, with thick and elevated margins forming lateral carina and numerous long hairs, except on disc where hairs short; median carina obsolete; apical spine long, moderately elevated basally, apex recurved upward in lateral view (Fig. 29). Strong spiniform process implanted on posterior portion of anterolateral angle of metathorax (Fig. 29). Sternal area somewhat brighter; prosternum larger on anterior margin, stridulitrum long, narrow (Fig. 30); mesosternum larger than metasternum, each with a median carina. Forewings extending slightly beyond tip of abdomen; darkened, with basal portion and C + R vein (nomenclature follows Villiers 1943a), except its apex and pterostigma, yellowish; anal area brighter as well; C+R vein covered with long fine hairs, which are sparse on R + M veins and pterostigma (Fig. 27). Legs brighter, with golden and yellowish hairs, these more numerous ventrally on profemora; protibiae swollen apically; procoxa approximately 2.5 times longer in length than in width, with bump on its inner side with bright wax-like excretion loosely attached (Fig. 30); pro- and posterior femora somewhat curved in middle portion. ABDOMEN: posterior angles of connexival segments I–V with short and acute spines, these decrease in size distally; connexivum yellowish, without markings (Fig. 27); sternites yellowish; canaliculae between sternites I–II and discrete punctuations in sutures between sternites II–V; a prominent median longitudinal keel runs along all sternites. MALE GENITALIA (Figs. 31–36): Medial process of pygophore elongated (Figs. 31–32). Pygophore subpentagonal in ventral view (Fig. 31). Parameres symmetrical, slightly curved at middle portion, basis thinner (Figs. 31, 33); apices with a very small tooth, almost imperceptible (Figs. 33–34); with sparse hairs in the exposed portion, mainly on outer margin (Fig. 33). Phallus elongated, somewhat tubular, with articulatory apparatus somewhat short and apex and with apical acute projections (Figs. 35–36).

Material examined: male holotype, BRAZIL, Amazonas, Borba, Rio Abacaxis (05° 15’ 09” S – 58° 41’ 52” W), 35 m, 27–29.V.2008, arm. suspensa no dossel, J.A. Rafael e equipe [leg.], [INPA].

Etymology. The name of the new species was given in reference to its general similarity to O. conformis .

PLATE 5. Figs. 27–31, Oncerotrachelus paraconformis sp. nov., male holotype, 27, dorsal view, 28, first antennal segment, basal portion, 29, humeral spines, scutellum and spine of metathorax, lateral view, schematic, 30, head and thorax, ventral view, the arrow points to wax-like excretion partially detached from the procoxa, 31, male genitalia, pygophore and parameres after clarification showing the contour of articulatory apparatus and basal portion of phallus inside, ventral view.

PLATE 6. Figs. 32–36, Oncerotrachelus paraconformis sp. nov., male holotype, genitalia, 32, pygophore, dorsal view, 33–34, paramere, 34, apex, 35–36, phallus, dorsal view, 36, distal half.