Charagochilus bimaculatus ( Poppius, 1910 ) Gapon, D. A., 2014

Gapon, D. A., 2014, Revision of the genus Polymerus (Heteroptera: Miridae) in the Eastern Hemisphere. Part 1: Subgenera Polymerus, Pachycentrum subgen. nov. and new genus Dichelocentrum gen. nov., Zootaxa 3787 (1), pp. 1-87 : 54

2. Charagochilus bimaculatus ( Poppius, 1910) comb. nov.

( Figs 19 I ; 20 F–H ; 22 A–C ; 26 A, B ; 41 B )

Poeciloscytus bimaculatus Poppius, 1910: 48 .

Polymerus bimaculatus Carvalho, 1959: 234 .

Polymerus (Poeciloscytus) bimaculatus Odhiambo, 1959: 36 .

Material examined. Ghana, Tafo , 1, 13, 20, 27, 29, 30 Sept. 1965, 17, 30 Oct. 1965, at light, UV trap, D. Leston, 5 males *, 3 females * ( BMNH) ; Republic of Côte d'Ivoire, Adiopodoumé , 29 Sept.—7 Oct. 1973, R. Linnavuori, 2 males *, 1 female * ( AMNH) ; Tanzania, Bukoba , 12 June 1913, 1 male * ( ZISP) .

First description of male and female terminalia. Right paramere ( Fig. 20 F ) small, about one-third as long as left paramere, rather strongly widening distally. Hypophysis very small, lying in center of large membranous apical part of paramere body and directed sideways and upwards.

Left paramere ( Fig. 20 G, H ). Sensory process from posterior view triangular, rather shorter and narrower than in previous species. Hypophysis from lateral view as in previous species, but slightly less dilated.

Theca with apical margin having only one large triangular blade as in previous species.

Vesica ( Fig. 22 A–C ). Secondary gonopore located on anterior left side of vesica, with complete ring of concentrically curved spinulae. Anterior right lobe with two branches. Anterior branch long, directed anteriad and slightly upwards, with pointed apex. Base of superior surface of this branch with rather long conical pointed tubercle, directed antriad and upwards. Anterior branch of baso-apical sclerotised band continuing on posterior surface of this tubercle, tapering, but not protruding beyond apex of the latter. Left branch of anterior right lobe shorter than anterior one, with narrowly rounded apex, directed posteriad and downwards. Posterior part of vesica moderately large, slightly swollen in basal part, with convex left wall and elongated, pointed, slightly shifted to right and directed upwards posterior apex. Medial right lobe large, with two branches. Right branch wide, with broadly rounded apex, directed upwards and to right. Right wall of the latter with wide and long medial spicule directed posteriad. Apical part of medial spicule strongly dilated in sagittal plane in the shape of spoon concave on right side. Left branch of medial right lobe short and narrow pointed, directed to left. Posterior spicule acicular, slightly longer than in previous species, lies behind and on the right of medial lobe base, directed anteriad and slightly to right. Posterior branch of basi-apical sclerotised band reaches base of posterior spicule. Posterior right lobe long, directed the right, anteriad and upwards, T-shaped apically, with two short, narrow branches, directed anteriad and posteriad respectively. Left carina extends from apex of posterior part of vesica almost till secondary gonopore. Anterior and of carina strongly convex, rather wide, serrated and forms short pointed process directed anteriad. Medial part of carina flat, vanishing, without denticles in middle; posterior part convex, narrow and serrated. Posterior wall of vesica sclerotised in extreme base, with small flatted tubercle with sclerotised, smooth inferior surface.

Gynatrium ( Fig. 26 A, B ) generally as in previous species. Ring sclerites greater than in Ch. flavipes . Roundish area in middle of dorsal labiate plate greater and more convex than in Ch. flavipes . Sclerotised band connecting round sclerites entire, rather narrow, arcuately curved anteriad and lies on anterior margin of convex area mentioned above. External margins of ring sclerites without triangular plates. Tectal sclerites separate, wide and rather long. Their internal margins long, connivent anteriorly and divergent posteriorly. Posterior margins of tectal sclerites rather straight, not curved upwards. Dorsal sac absent. Inner horizontal and transverse folds absent. Bases of lateral oviducts lye near posterior margin of gynatrial roof. Medial lobe absent. Posterior margin of roof with straight lateral parts. Dorsal margin of interramal sclerite with straight lateral parts and small triangular protrusion in middle; ventral margin with deep arcuate notch. Anterior walls of internal lobes membranous, dorsal margin of their openings without sclerotised edging. Medial process, dorsal structure and lateral lobes entirely absent. Anterior vestibular sclerites large, transverse, dilated interiorly and narrowing exteriorly. Posterior vestibular sclerites very small longitudinally oblong.

Taxonomic notes. This species has a short preocular part of head, a small right paramere, the claw without denticle, the collar usually about equal in width to the diameter of the first antennal segment and slightly wider then the diameter of the second antennal segment in the middle, the rather fine punctuation on the pronotum ( Fig. 41 B ). Intermediate states of the last two characters do not allow putting this species explicitly into Polymerus or Charagochilus . Nevertheless this species shares with the latter genus the following main diagnostic characters: a dolabriform hypophysis of the left paramere; the apical margin of the theca with only one triangular sclerotised blade; the vesica with the left carina, with the medial right lobe bearing lamellar medial spicule, with the posterior spicule lying between bases of the medial right and posterior right lobes, without anterior and posterior left lobs; the secondary gonopore with complete ring of concentrically curved spinulae; and the gynatrium without the inner horizontal and transverse folds, dorsal sac, medial lobe and medial process.

Figures

FIGURE 19. Structure of tarsus and pretarsus. A–K, tarsus; L– P, claw. A, Polymerus unifasciatus; B, P. carpathicus; C, P. holosericeus; D, Charagochilus gyllenhalii; E, Ch. spiralifer; F, Ch. angusticollis; G, Ch. pallidicollis; H, Ch. flavipes comb. nov.; I, Ch. bimaculatus comb. nov.; J, Ch. obscuratus comb. nov.; K, Ch. consanguineus comb. nov.; L, P. carpathicus; M, Dichelocentrum ornatifrons comb. nov.; N, Proboscidocoris nitidus; O, Pr. feanus; P, Pr. solitus comb. nov. Scale bare: 0.28 mm

FIGURE 20. Parameres of Charagochilus species. Right (A, F, I, L, O) and left (B–E, G, H, J, K, M, N, P, Q) parameres. A- C, Ch. spiralifer; D, E, Ch. flavipes; F–H, Ch. bimaculatus; I–K, Ch. obscuratus; L–N, Ch. consanguineus comb. nov.; O–Q, Ch. aureus comb. nov. Left (B, D, G, J, M, P) and posterior (C, E, H, K, N, Q) view. Scale bare: 0.14 mm.

FIGURE 22. Vesica of Charagochilus species. A–C, Ch. bimaculatus; D, E, Ch. obscuratus comb. nov. Left (A, D), right (B, E) and posterior (C) view. ab.bab—anterior branch of baso-apical sclerotized band; arl—anterior right lobe; lsc—left serrate carina; mrl—medial right lobe; ms—medial spicule; pa—posterior apex of vesica; prl—posterior right lobe; ps—posterior spicule. Scale bare: 0.14 mm.

FIGURE 26. Inner female genitalia of Charagochilus species. A, B, Ch. bimaculatus comb. nov.; C, D, Ch. consanguineus comb. nov. Gynatrium, dorsal view (A, C), posterior wall of gynatrium (B, D), ventral view. ts—tectal sclerites. Scale bare: 0.14 mm.

FIGURE 41. Charagochilus species, head and thorax. A, Ch. flavipes comb. nov.; B, Ch. bimaculatus comb. nov.; C, Ch. obscuratus comb. nov.; D, Ch. madagascariensis comb. nov.; E, Ch. consanguineus comb. nov.; F, Ch. aureus comb. nov.