Head distinctly longer than broad, tapering upward; Paraclypei almost equal to clypeus, lateral margins almost smooth and without tooth; anteocular region of head twice more than remainder of head, antennae five segmented, 1st antennal segment not reaching apex of head, anteocular distance 3.4 mm, remainder of head 1.4 mm long, width of head 3.3 mm, interocellar distance 1.1 mm; interocular distnace 1.9 mm, length of head 3.0 mm, antenniferous
tubercles partially visible, length of antennal segments: I 0.9 mm, II 2.0 mm, III1.5 mm, 4th and 5th mutilated in holotype and paratype , among three segments, 2nd is longest and 3rd is smallest segment; labium extending to fourth abdominal sternite, length of labial segments: I 2.1 mm, II 4.0 mm, III 3.4 mm, IV 2.8 mm (Fig 1A).
7) as usual in subfamily, long and slender, apparent first segment (II) relatively short, stout, not reaching to level of antenniferous
tubercle, apparent second segment (III) very long and slender, narrowing posteriorly, apparent third segment (IV) shortest.
Head: wider than long, the anterior process short with small clypeus; gena reduced, not exceeding apex of clypeus; antenniferous
tubercles blunt; eyes large, semiglobose; postocular margins broadly rounded without tubercles or spine, not exceeding outer margins of eyes, converging on constricted neck; antenna long and stout, first and fourth segments subequal in length, second shortest, third longest, first incrassate, second, third and fourth clavate, fourth with pilose apex (Fig.
Among the Reduviidae subfamilies, Phimophorinae can be distinguished by the following combination of characters: presence of waxy secretions on the cuticle; body depressed; antennae inserted at the apex of head, distal flagellomere reduced; antenniferous
tubercles plate-like, covering the insertions of the antennae; buccula present; prosternal sulcus with lateral shield-like structures; and bisegmented tarsus (Usinger and Wygodzinsky 1964).
The subgenus Merocoris (Perty 1830) is characterized by having the antenniferous
tubercles unarmed, the anterolateral borders of pronotum smooth or with single tubercle, and the scutellar disk conically raised.
Head: Wider across eyes than long (26.5/23); "genae" much shorter than clypeus and adherent at its apex; antenniferous
lobes short with apex acute; antennae 2.45x as long as width of head (65/26.5), segment I by far longest, cylindrical and slightly curved, segments II + III shorter, more slender, and straight, IV shortest and clavate; length of antennal segments I/II/III/IV = 29/13.5/15.5/7; eyes stalked and directed anterolaterally; postocular lobes sinuately converging to constricted neck; vertex with a carinate ridge laterally delimited by longitudinal grooves; rostrum arising from a slitlike atrium, shorter than head, lateral margins of rostral groove beset with a fringe of stiff setae.
Structure: body oblong, parallel-sided; head with vertex slightly convex; eyes simple, barely pedunculate; buccula low, short, scarcely extended backward as far as the antenniferous
tubercles, and apically rounded; rostrum reaching middle third of metasternum; pronotum with collar wide; frontal angles obtuse, rounded; anterolateral margins narrowly but distinctly carinate; humeral angles rounded, not exposed; fore femur with two subapical spines; middle and hind femora unarmed; macropterous, hemelytral membrane extending beyond the apex of last abdominal segment; costal margin slightly emarginate; apical margin straight; apical angle subacute; abdomen parallel, not dilated.
Both homonymical and synonymical usage abounds with anatomical terminology of insects, namely Heteroptera, such as "antennal tubercle, antennal sclerite, antennifer, antenniferous
tubercle, antennal socket, torus, torulus." We apply here a simple English terminology.
orinocoensis the pronotum, clavus, corium, prothorax, and metathorax are entirely yellow and the antenniferous
tubercle dark brown to black.
Both genera can be recognized by six characters: 1) hind femora unarmed; 2) antennal segments II and III cylindrical, not sulcate or dilated; 3) female genital plates short to medium-sized, never laminate; 4) mesopleura and metapleura without creamy-yellow hardened protuberance; 5) antenniferous
tubercle armed; 6) antennal segment IV pyriform.
It is recognized by having the hind femora unarmed; antennal segments II and III cylindrical and usually robust; antennal segment IV fusiform and slender; the antenniferous
tubercle armed; the mesopleura and metapleura without yellowish-white granules; the female genital plates short to medium sized, never laminate or elongate; and the distal lobe of each paramere short.
tubercles clearly visible in dorsal view.