Chelyolygus cheroti, Yasunaga, 2024

Yasunaga, Tomohide, 2024, New genera and species of the ‘ Lygus-complex’ ranging from the Himalaya-Oriental to the Wallacea region (Insecta: Heteroptera: Miridae: Mirinae), Raffles Bulletin of Zoology 72, pp. 371-423 : 375-377

Chelyolygus cheroti , new species

( Figs. 1 C−F, 3G−L, 19)

Type material. Holotype: male, INDONESIA: Bali, Tabanan, Bedugul Area , 8°16′S, 115°09′E, local collector, 8–12 August 1996 ( ZRC) ( AMNH _ PBI 00378776 ) . Paratypes: INDONESIA: 2 males, 1 female, same data as for holotype ( AMNH, TYCN) .

Diagnosis. This new species is recognised primarily by the following characters: Dark general colouration ( Fig. 1C–F ); medium size; widely darkened apical parts of antennomeres I and II; dark mesal stripe on scutellum; widely fuscous hemelytra; partly striped anterior clavus; distinctly bifurcate hypophysis of right paramere ( Fig. 3H ) with a thumb-like process at apex of sensory lobe ( Fig. 17J ); two slender, weakly curved spicules on vesica; ovoid, rather enlarged, thick-rimmed sclerotised rings relatively contiguous to each other mesally ( Figs. 3K , 13M ); wide, flat dorsal structure; and relatively wide, subtriangular interramal lobe on posterior wall ( Figs. 3L , 13N–O ).

male; PRN: pronotum, PA: paratype, TB: tibia, VTX: vertex (interocular space), W: width. Bold letters showing new taxa; *shrinking antennomere IV.

Description. Body widely darkened posteriorly, with remaining parts pale brown or pale orange brown, oval, tortoise-shaped ( Fig. 1 C−F); dorsum shining, with uniformly and rather sparsely distributed, pale, simple, reclining setae on hemelytron ( Fig. 19E ). Head shiny pale brown or orange brown, with fuscous clypeus ( Fig. 1D, F ); lorum and buccula slightly darkened; vertex about as wide as an eye in dorsal view, with basal transverse carina about as thick as pronotal collar ( Fig. 19A ). Antenna dark brown; basal ¼–⅓ of antennomere I, and bases of II and III usually pale brown; antennomere II shorter than labium. Labium shiny pale brown, partly suffused with red, reaching or slightly exceeding apex of metacoxa ( Fig. 1D, F ). Pronotum shining, polished, widely pale brown, with a pair of dark spots on calli, sparsely bearing short, semi-erect setae laterally; pleura pale brown; metathoracic scent efferent system creamy yellow, rather rounded ( Fig. 19D ); scutellum broadly striped mesally, smooth, nearly flat, with sparsely distributed, pale, short, reclining setae ( Fig. 19E ). Hemelytron shining, widely darkened posteriorly; anterior clavus and corium with striped pattern; apical half of cuneus yellowish brown; membrane pale smoky brown. All coxae and legs pale brown, partly tinged with red; trochanters and legs creamy yellow; metafemur chocolate brown, except for pale extreme base; all tarsi more or less darkened; pretarsal structures as in Fig. 17G ; parempodia wide. Abdomen fuscous, except for male genital segment (pygophore) pale reddish brown. Male genitalia ( Figs. 3G–J , 19H–K ): Left paramere rather L-shaped ( Figs. 3G , 19G ); right paramere with bifurcate hypophysis ( Fig. 3H ) and a thumb-like process at apex of sensory lobe ( Fig. 19J ). Vesica with two slender, relatively shirt, weakly curved spicules ( Fig. 3I ). Female genitalia ( Figs. 3K, L , 19M–O ): Genital chamber with ovoid, rather enlarged, thick-rimmed sclerotised rings that are relatively contiguous to each other mesally ( Figs. 3K , 19M ); posterior wall with wide, flat dorsal structure; and relatively wide, subtriangular interramal lobe ( Figs. 3L , 19N, O ).

Measurements. See Table 1.

Etymology. Named after Dr. Frédéric Chérot, an eminent Belgian heteropterist and miridologist; a noun in the genitive case.

Distribution. Indonesia (Bali).

Biology. Unknown.

Figures

Fig. 1. Habitus images of Chelyolygus species. A, B, Chelyolygus tabananicus, new species, holotype female in dorsal (A) and ventral (B) views; C, D, C. cheroti, new species, male; E, F, ditto, female; G, C. wolskiorum, new species, female in ventral view; H, ditto, holotype male in ventral view; I, C. bipuncticollis, male in dorsal view; J, ditto in right lateral view.

Fig. 3. Male (A–D, G–J) and female (E, F, K, L) genitalia of Chelyolygus wolskiorum, new species (A–F) and C. cheroti, new species (G–L). A, Apex of pygophore; B, G, left paramere; C, H, right paramere; D, I, J, vesica; E, K, genital chamber with sclerotised rings and adjacent structures; F, L, posterior wall. Scale bars 0.2 mm.

Fig. 17. Male (A–E) and female (F–H) genitalia of Paralygocoris vittulatus (A–F) and P. meridionalis (G–H). A, Apex of pygophore (genital segment) with parameres, dorsal view; B, right paramere; C, left paramere; D, E, vesica; F, genital chamber; G, posterior wall; H, apex of ovipositor (gonapophysis I). Scale bars 0.2 mm.

Fig. 13. Male (A–G) and female (H–I) genitalia of Himalisundacoris duwalae, new species. A–C, left paramere; D, E, right paramere; F, vesica; G, ditto, secondary gonopore and adjacent structures; H, posterior wall; I, genital chamber. Scale bars 0.2 mm.

Fig. 19. Scanning electron micrographs of Chelyolygus cheroti, new species. A, Head and anterior pronotum, dorsal view; B, ditto, left lateral view; C, scutellum and anterior hemelytron, left lateral view; D, metathoracic scent efferent system; E, scutellum, clavus and corium, dorsal view; F, metatarsi of each sex; G, pretarsal structure of metaleg; H, apex of pygophore, ventral view; I, left paramere; J, right paramere; K, vesica; L, apex of ovipositor (gonapophysis I); M, genital chamber; N, O, posterior wall.