Proboscidocoris Reuter, 1882

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 : 59-60

Genus Proboscidocoris Reuter, 1882

Type species by monotypy: Proboscidocoris fuliginosus Reuter, 1882 .

Studied species: Proboscidocoris (s. str.) fuliginosus Reuter, 1882 ; Proboscidocoris (s. str.) rufinervis Poppius, 1914 ; Proboscidocoris (Rhyssicoris) intermedius Poppius, 1912 ; Proboscidocoris (Prosopicoris) feanus Poppius, 1912 ; P. malayus Reuter, 1908 and P. varicornis (Jakovlev, 1904) .

Diagnosis. According to Carvalho (1955) and Odhiambo (1959), head strongly pointed in front (except for Pr. nitidus ) ( Fig. 27 С), more or less strongly inclined, from lateral view usually appears twice as long as high (except for Pr. nitidus ); claws strongly toothed at base (except for Pr. nitidus ) ( Fig. 19 O ); first tarsal segment usually distinctly shorter than second one; ostiolar peritreme very large; body usually densely covered with adpressed white or yellowish pubescence. Actually, a peritreme size (which varies in different species of the genus), and the relative length of tarsal segments are not diagnostic. The rest of the mentioned characters can be supplemented by anterior right lobe of vesica with large superior branch and the following combinations of characters: diameter of second antennal segment in males not greater than collar width and slightly greater than diameter of third segment; collar in all studied by me species wide (except for Pr. nitidus ); right paramere large, with strongly sclerotised body, except for weakly sclerotised anterior wall, and rather wide, curved anteriad hypophysis; hypophysis of left paramere wide from superior view or flattened laterally; anterior and posterior (except for Pr. nitidus ) left lobes present; anterior spicule of vesica not branched; posterior part of vesica without left serrate carina, medial right lobe, medial and posterior spicules; baso-apical sclerotised band long, branched, its posterior branch not strongly dilated distally and not reaches posterior apex of vesica (except for Pr. feanus ); posterior part of vesica without posterior bladder and fields of microtrichia; secondary gonopore with complete ring of subequal concentrically curved spinulae ( Fig. 13 D ); inner horizontal fold and medial process in gynatrium ( Fig. 31 ) present, medial lobe absent (except for Pr. nitidus ).

Description of the male and female terminalia. Right paramere ( Fig. 28 A, F, G ) almost similar in all studied species, slightly shorter then right paramere, with almost straight body having weakly sclerotised anterior wall and rather small hypophysis curved anteriad.

Left paramere ( Fig. 28 B–E, H, I ). Hypophysis in P. intermedius , P. feanus , P. malayus and P. varicornis is more or less flattened in horizontal plane, rather narrow from lateral view. In P. feanus hypophysis slightly dilated from posterior and superior view, its right wall thickened, vertical, with superior and inferior margins forming carinae, not covered with setae. Inferior carina rather high, not reaching apex of hypophysis; superior carina low, gradually decreasing anteriorly. Apex of hypophysis acute. In P. intermedius , P. malayus and P. varicornis hypophysis dilated from posterior and superior view, and narrowed from lateral view, with very thin carinae on superior and inferior margins of internal wall; superior carina with small triangular plate in muddle. Internal wall of hypophysis with row of short setae Apex of hypophysis slightly lamellate dilated. In P. rufinervis hypophysis slightly flattened laterally, rather wide from lateral view, with carinated and smoothly convex superior margin and more convex inferior one, and without setae. Apex of hypophysis elongated, acute. In P. fuliginosus hypophysis lamellate in apical part, strongly flattened laterally. Its superior and inferior margins convex, superior one with acute denticle directed posteriad, inferior margin weakly sclerotised. Posterior wall of hypophysis basal part cowered with rather short setae.

Aedeagus. Apical margin of theca forms only one long anterior lobe turning anteriad in time of inflation of vesica. Anterior (inferior) margin of anterior lobe weakly sclerotised.

Vesica ( Figs 13 D ; 29 ) large, its anterior part greater or equal in size with posterior one. Right side of vesica with deep impression enclosing long baso-apical sclerotised band divided into anterior and posterior branches apically. Left side of vesica also with impression and secondary gonopore in it. Secondary gonopore entirely visible from left view, not closed by lobes of vesica. All spinulae of secondary gonopore subequally long ( Fig. 13 D ). Anterior part of vesica swollen, with two lobes. Anterior right lobe subdivided into three branches. Superior branch large, swollen, directed upwards and curved to left. Wide anterior branch of baso-apical sclerotised band lie on posterior left side of anterior right lobe and continue into curved anterior spicule located on posterior wall of superior branch of anterior right lobe. In P. fuliginosus superior branch of this lobe bearing also short and slightly dilated C-shaped additional anterior spicule on anterior wall. Anterior branch of anterior right lobe swollen, shorter then superior one, tapering in P. fuliginosus , subrectangular in P. rufinervis and rounded in other species, directed anteriad and downwards, with small tubercle before apex. Right branch of anterior right lobe in the main short, narrowly conical, directed to right and slightly posteriad. In P. feanus this branch long and strongly swollen. In P. intermedius anterior right lobe not divided into branches, strongly dilated and rounded apically, directed to right. Anterior left lobe in all species rather narrow (dilated apically in P. fuliginosus ), not branched, directed upwards and curved anteriorly or posteriorly (in P. intermedius and P. feanus ). Anterior wall of this lobe in P. rufinervis , anterior wall and entire apex in P. fuliginosus and P. intermedius covered with vanishingly small denticles. Posterior part of vesica with short tapered posterior apex directed posteriad and usually small tubercle on superior surface. Posterior apex in P. feanus very short, smoothed, without tubercle. In P. fuliginosus , P. rufinervis and P. intermedius small rounded medial left tubercle located above secondary gonopore; in the latter species this tubercle merged with posterior wall of anterior left lobe and is barely visible. Posterior left lobe short and rather wide, with two short branches. Superior branch directed anteriad, in P. intermedius it longer than in other species and absent in P. feanus ; inferior branch directed to left and posteriad, in P. intermedius modified into low and wide tubercle. Medial right lobe and medial spicule absent. Posterior branch of baso-apical sclerotised band long, continuing on superior wall of posterior part of vesica till its posterior apex. Posterior right lobe large, lying on right wall of posterior part of vesica, with base curved anteriad and two or three branches. In P. fuliginosus and P. rufinervis posterior right lobe very large, with rather long and narrow base and three branches. Left one very long, directed to left and upwards; right branch shorter, directed to right and slightly downwards. Short posterior branch lies at base of right branch and directed posteriad and downwards. In P. intermedius posterior right lobe as in two previous species but only with low smooth tubercle on place of right and posterior branches. In P. varicornis , P. malayus and P. feanus base of this lobe substantially shorter than in other species. In first two species lobe subdivided into two branches, right of them short, directed to right. Left branch in P. varicornis long, directed upwards and posteriad; in P. malayus this branch only slightly longer than left one, directed upwards. In P. feanus posterior right lobe rather strongly swollen, with three branches; right one longest, directed anteriad, left branch slightly shorter, directed to left and posteriad, posterior branch shortest, directed to right and posteriad. Secondary gonopore rather small, reinforced with ring of subequally long, curved concentrically spinulae.

Gynatrium ( Fig. 31 ). Ring sclerites connected (except for P. feanus and P. varicornis ) by narrow sclerotised band. Their external margins without triangular plates. Dorsal sac large, flattened dorso-ventrally. Tectal sclerites separated, large. Inner horizontal fold presents, wide and rather long. Transverse fold absents. Medial lobe absents. Interramal sclerite as in Polymerus and Charagochilus . Anterior walls of interramal lobes sclerotised. Medial process convex, rounded. Anterior vestibular sclerites longitudinally oblong, lying in frontal plane, present in all studied species. P. fuliginosus and P. intermedius with posterior vestibular sclerites lying at membrane above anterior ones also in frontal plane. In P. feanus anterior part of gynatrium strongly narrowed, ring sclerites very small, dorsal sac located just behind them, very narrow and strongly convex.

Figures

FIGURE 13. Secondary gonopore. A, Polymerus (Pachycentrum) nigrita; B, P. (Poeciloscytus) unifasciatus; C, Charagochilus gyllenhalii; D, Proboscidocoris fuliginosus; E, Pr. nitidus; F, Dichelocentrum longirostre. lsc—left serrate carina; sgp—subgonoporal plate.

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 27. Head. A, Polymerus carpathicus; B, E, Proboscidocoris nitidus; C, Pr. feanus; D, F, Pr. solitus comb. nov. Lateral (A–D) and dorsal (E, F) view. Scale bare: 0.14 mm.

FIGURE 28. Parameres of Proboscidocoris species. Right (A, F, G, J, K) and left (B–E, H, I, L–N) parameres. A-E, Pr. feanus; F–I, Pr. fuliginosus; J–N, Pr. nitidus. Left (B, H, L), right (E, F, J), superior (D), anterior (M) and posterior (A, C, G, I, K) view. Scale bare: 0.14 mm.

FIGURE 29. Vesica of Proboscidocoris fuliginosus. A, left view; B, posterior-right view. ab.bab—anterior branch of basoapical sclerotised band; all—anterior left lobe; arl—anterior right lobe; as—anterior spicule; as2—additional anterior spicule; mlt—medial left tubercle; pa—posterior apex of vesica; pll—posterior left lobe; prl—posterior right lobe; sb—superior branch of anterior right lobe. Scale bare: 0.14 mm.

FIGURE 31. Inner female genitalia of Proboscidocoris fuliginosus. A, gynatrium, dorsal view; B, posterior wall of gynatrium, ventral view; C, vestibular sclerites, dorsal view. avs—anterior vestibular sclerites; ihf—posterior margin of inner horizontal fold; mpr—medial process; pvs— posterior vestibular sclerites; ts—tectal sclerites. Scale bare: 0.14 mm.