Polymerus (Polymerus) holosericeus Hahn, 1831

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 : 30-33

4. Polymerus (Polymerus) holosericeus Hahn, 1831

( Figs 2 D ; 3 C ; 4 D ; 9 A ; 10 A–C ; 14 B ; 16 A, B ; 19 C ; 40 D )

Polymerus holosericeus Hahn, 1831: 27 .

Capsus variabilis (non Fallén, 1807): Herrich-Schaeffer, 1841: 44.

Material examined. Without geography designation, “873”, “c. V. Jakovleva ”, 1 female. Italy : Trieste, 7 June1929 (Passauro), 1 female; Magenta, 17 May 1934 (Passauro), 1?, 2 males * ( ZISP). Ukraine: Crimea :

“ Tauria ” (W. Pliginskiy), 1 male ; Agarmysh , 7 June 1907 (V. Jakovlev), 1 female ; Taushan-Bazar [Privol’noe], 4 June1907 (W. Pliginskiy), 1 female ; Khmel’nitskaya Prov., Kamenets-Podol’skiy Distr., Blagovitsa Settlm. , 12 – 18 June1895 (Grum-Grzhimaylo), 1 female ; Donetsk Prov., Svyatogorsk , 22 June 1937 (Arnoldi), 1 female ; Lugansk Prov., Proval’e Settlm. , 20, 23 June 1947 (S.I. Medvedev), 1 male *, 1 female ( ZISP). Russia: Ryazan’ Prov., Gremyachka Will, 19 June , 1 July 1909 (A. Semenov), 2 females *; Penza Prov.: “Nizhnelomovskiy Uezd”, between Chembar [Belinskiy] and Penza, 23 June 1864 (Chekanovskiy), 1 male *; Voronezh Prov., Kamennaya Step’ , 11 km S of Talovaya, 15 July 1935 (Stark), 1 male *; Stavropol’ Terr. “Terskaya Prov.”, Mashuk Mt. , 2 June 1914 (P. Silavin), 1 female ; Republic of Tatarstan: “Bugul’minskiy Uezd” [Cheremshanskiy Distr.], Pavlovka Will. , 18 July 1908 (Elachich), 1 female ; Republic of Bashkortostan,“Ufimskaya Govern., Belebeevskiy Uezd”, Aksenovo Settlm. , 14 – 16 July 1908 (A. Grigor’ev), 1 male * ( ZISP). Azerbaijan: Aresch (A. Schelkownikow), 1 female ( ZISP) .

Diagnosis. Recognised by follow combination of characters: antennae yellow, apex of second segment dark, body surface shiny, ventrally and dorsally covered with golden, slightly thickened setae, xyphus with yellow margins, femora dark brown in basal three-quarter and yellow in apical fourth, with brown subapical spots or ring, tibiae apically darkened, tibial spines dark brown, anterior corner of corium at most with little vague dirty yellow patch, cuneus black, with yellow apex and narrow stripe or spot at base. Males distinguished by posterior right lobe of vesica without apical sclerite, with weakly sclerotised, not expanded distally basal sclerite, with rather short longitudinal carina not surrounded by field of sclerotization; and by unbroken supragonoporal area of sclerotization. Females distinguished by relatively short gynatrial dorsal sac, long medial lobe with narrow base and large subrectangular sclerite on ventral wall.

Redescription. Vestiture and colouration ( Fig. 40 D ). Body surface shiny, covered with only goldish flattened setae. Antennae yellow, apex of second segment dark. Third antennal segment sometimes black at apex, fourth segment sometimes almost entirely brown. Head sometimes with two vague brown or yellow spots before antennae. Very narrow pale band on posterior margin of pronotum can be interrupted in the middle or absent. Xyphus of prothorax black with narrow yellow margins. Margins of coxal cavities of prothorax with narrow yellow strips. Femora in their basal three-quarter dark brown and yellow in apical fourth, with brown spots or ring before apices. Apical rings on femora, if present, often disconnected on superior surfaces. Fore femora sometimes black only basally. Tibiae yellow, darkened on knees and apices, with two brown rings in basal half. Proximal ring slightly shorter than distal one and somewhat shifted from knee. Spines on tibiae dark brown. Rings on tibiae sometimes absent and replaced with small brown spots. Anterior corner of corium often with little vague brownyellow patch. External margin of corium rarely with very short yellowish dab at base. Apical external corner of corium with yellow spot. Almost entire posterior margin of corium narrowly yellow in several examined specimens. Narrow strip or at least spot at base and apex of cuneus yellow ( Fig. 9 A ). Abdomen entirely black.

Right paramere ( Fig. 2 D ) with obconic body.

Left paramere ( Figs 3 C ; 4 D ). Hypophysis straight, its superior margin before blunted apex slightly concave in lateral view; from superior view hypophysis rather wide, its apex slightly bent sideways. Carina on superior margin of internal wall of hypophysis low, not visible from external view.

Vesica ( Fig. 10 A–C ). Superior part of spiculose plate without denticles, inferior part dentate. Vestige of anterior spicule before and above anterior right bladder elongated, with sharp sclerotised apex. Anterior left lobe with three branches. Anterior branch narrow, relatively long, pointed, directed anteriad and to right; inferior branch short, rather broad, directed downwards; left branch moderately short, wide, rounded, and directed to left. Posterior left lobe with two branches. Superior branch short, widely rounded directed upwards; inferior branch rather long, moderately wide, tapering, directed downwards and to right, without sclerite. Supragonoporal area of sclerotization looking like wide sclerotised band behind superior margin of secondary gonopore. On left side this band branches and extends on superior surfaces of left anterior and posterior lobes. One branch of band reaching apex of left branch of anterior left lobe and consisting of two narrow toothed contiguous spindle-shaped carinae. Right part of band elongated, rather narrow, covered with small denticles and lying above base of anterior right bladder. Postposterior left lobe narrow, gradually tapering to acute apex, directed to left and curved posteriad. Posterior right lobe long, relatively narrow, with elongated, pointed apex curved upwards, without apical sclerite. Longitudinal carina on right wall of posterior right lobe almost straight, not surrounded by field of sclerotization. Distance from its distal end to lobe apex approximately equal to length of this carina. Basal sclerite on rightinferior surface of posterior right lobe narrow, weakly sclerotised and not dilated distally. Posterior spicule narrow, long, adpressed to wall of posterior right lobe. Base of this spicule lying close to posterior end of longitudinal carina. Superio-posterior spicule directed upwards. Membrane of its left wall wide and strongly convex basally, tapering distad and appreciably not reaching spicule apex. Posterior bladder wide, its posterior wall broadly rounded, posterior apex conical.

Gynatrium ( Figs 14 B ; 16 A, B ). Anterior vestibular sclerites oval. Anterior margin of ventral labiate plate with deep, smoothly rounded V-shaped incision. Edging of round sclerites rather wide, triangular sclerites on their exterior margins very small. Medial prominences of posterior margin of tectal sclerites rather long, widely spaced, with parallel internal margins. Dorsal sac elongated anteriad medially. Transverse membranous fold of gynatrial roof deep. Medial lobe long, with narrow base and ventral wall with large subrectangular sclerite. Dorsal margin of interramal sclerite with large trapezoidal protrusion in middle and slightly concave lateral parts. Openings of interramal lobes with almost straight dorsal margins, anterior walls of these lobes rather weakly sclerotised.

Distribution (Fig. 17). Spain, France, Belgium, Netherlands, Luxembourg, Germany, Switzerland, Liechtenstein, Italy, Austria, Czech Republic, Poland, Slovakia, Slovenia, Hungary, Croatia, Bosnia and Hercegovina, Yugoslavia, Romania, Greece, Bulgaria, Latvia?, Ukraine, Moldavia, Russia (Northern, Central and South European Territories), Georgia, Azerbaijan, Turkey (European part).

Bionomics. This is a rare species, living on Galium spp. (Kerzhner, 1988) .

Figures

FIGURE 2. Right and left parameres of Polymerus species. A–G, right paramere; H–J, left paramere. A, H–J, P. carpathicus; B, P. nigrita; C, P. unciniger sp. nov.; D, P. holosericeus; E, P. russatus sp. nov.; F, P. pekinensis; G, P. amurensis. Left (H), posterior (I) and right (J) view. Scale bare: 0.14 mm.

FIGURE 3. Left paramere of Polymerus, left view. A, P. nigrita; B, P. unciniger sp. nov.; C, P. holosericeus; D, P. russatus sp. nov.; E, P. pekinensis; F, paratype of Poeciloscytus funestus; G. P. amurensis. Scale bare: 0.14 mm.

FIGURE 4. Left paramere of Polymerus, superior view. A, P. carpathicus; B, P. nigrita; C, P. unciniger sp. nov.; D, P. holosericeus; E, P. russatus sp. nov.; F, P. pekinensis; G, paratype of Poeciloscytus funestus; H. P. amurensis. Scale bare: 0.14 mm.

FIGURE 9. Cuneus and posterior margin of corium, dorsal view. A, Polymerus holosericeus; B, P. russatus sp. nov., holotype.

FIGURE 10. Vesica of Polymerus. A–C, vesica of P. holosericeus; D, posterior right lobe of vesica of P. russatus sp. nov., holotype. Right (A, D), superior (B) and anterior (C) view. all—anterior left lobe; arb—anterior right bladder; bab –basoapical sclerotised band; bs—basal sclerite of posterior right lobe; ds—ductus seminis; lc—longitudinal carina of posterior right lobe; ms—medial spicule; pb—posterior bladder; pll—posterior left lobe; ppll—postposterior left lobe; prl—posterior right lobe; ps—posterior spicule; sgas—supragonoporal area of sclerotisation; sp—spinulose plate; sps—superio-posterior spicule. Scale bare: 0.25 mm.

FIGURE 14. Inner female genitalia of Polymerus species. A, gynatrium of P. carpathicus; B, membrane in base of ventral labiate plate of P. holosericeus; C, vestibular sclerites of P. nigrita. Ventral (A, C) and dorsal (B) view. ihf—inner horizontal fold; il—interramal lobes; is—interramal sclerite; ml—medial lobe; tf—transverse fold of roof; vlp—ventral labiate plate. Scale bare: 0.25 mm.

FIGURE 16. Inner female genitalia of Polymerus species. A, B, Polymerus holosericeus; C, D, P. pekinensis; E, F, P. amurensis. Gynatrium from dorsal view (A, C, E), posterior wall of gynatrium from ventral view (B, D, F). Scale bare: 0.25 mm.

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 40. Polymerus species, habitus. A, P. (Pachycentrum) carpathicus, male; B, P. (Pachycentrum) nigrita, female; C, P. (Pachycentrum) unciniger sp. nov., male; D, P. (s. str.) holosericeus, female; E, P. (s. str.) russatus sp. nov., male; F, P. (s. str.) russatus sp. nov., female; G, P. (s. str.) pekinensis; H, holotype of Poeciloscytus funestus, male; I, paratype of Poeciloscytus funestus, female; J, Polymerus (s. str.) amurensis, female.