Voconia lasiosoma, Castillo & Rédei & Weirauch, 2022

Castillo, Stephanie, Rédei, Dávid & Weirauch, Christiane, 2022, Pseudocetherinae (Hemiptera: Reduviidae) revisited: phylogeny and taxonomy of the lobe-headed bugs, European Journal of Taxonomy 788 (1), pp. 1-95 : 57-60

Voconia lasiosoma sp. nov.

urn:lsid:zoobank.org:act:C5495703-AEE2-49FC-8B08-099ED0F398D3

Figs 1–2 , 7 , 9 , 12 , 14 , 20

Diagnosis

Recognized from other Voconia by the densely long setation on the pronotum, corium, legs, and abdomen. This species most closely resembles two other Southeast Asian species, V. isosceles sp. nov. and V. loki sp. nov. due to the finely granulose head and pronotum and dark pronotum with contrasting pale posterior margin. While V. loki sp. nov. is also hairy, V. lasiosoma sp. nov. is larger (about 9.4 mm) than these two species; legs, antennae, and corium are dark yellowish-brown rather than yellow; dark portions of corium and clavus are black rather than reddish-brown; Cu-An 1 cell stout (less than half the length of M-Cu cell); and proximal half of corium not entirely yellow (abducted corium with anteroproximal yellowish-brown stripe and posteromedial yellow spot).

Etymology

Derived from the Latinized Greek prefix ‘ lasio- ’ meaning ‘hairy’ combined with the Latinized Greek noun ‘- soma ’ meaning ‘body’. Refers to the long macrosetae covering the body and hemelytra. A noun in apposition.

Type material

Holotype MALAYSIA • ♂ (dissected pygophore and aedeagus in vial); Sarawak, Lanjak Entimau Wildlife Sanctuary; [1.55 ° N, 110.36 ° E]; [elev. 3 m]; 9–10 Oct. 2017; W. Hwang et al. leg.; collecting event: SW17_L_27; MV light trap in dipterocarp forest; DNA voucher R_CW 5472; USI: UCR_ENT 00127826 ; ZRC.

Description

Male ( Figs 7 , 9 )

BODY LENGTH. About 9.4 mm; macropterous.

COLORATION. Head: dark brown; postocular region with dark patches adjacent to medial ocellar margin, semicircular pale stripe encircling both ocelli; labium lighter than head, yellow. Thorax: anterior pronotal lobe darker than head and posterior pronotal lobe; posterior pronotal lobe with dark yellowish-brown gradient; scutellum dark with contrasting dark yellowish-brown apical spine. Hemelytron (abducted): clavus black with proximal dark yellowish-brown spot and distal yellow stripe; corium black with anteroproximal dark yellowish-brown stripe, posteromedial and distal yellow spots; membrane mostly dark with pale stripe along most of M vein; membranal veins R and M proximally pale. Legs: yellowishbrown. Abdomen: dark brown.

INTEGUMENT AND VESTITURE. Head and pronotum: finely granulose with dense, long macrosetae interspersed among sparse pubescence; interocular region with two pairs of macrosetae paramedially; antennifer with short lateral setigerous tubercle; morphologically ventral surface of labium with dense, short macrosetae. Thorax: anterolateral angles of pronotal collar with macrosetae; scutellar lateral carinae with long setation. Hemelytron: corium with dense long setation. Legs: posterior row of protuberances on mid and hind femora with three large and three small spines on distal half. Abdomen: ventral surface pubescent, long macrosetae interspersed.

STRUCTURE. Head: elongate, about 1.3 times as long as wide; anteocular region about one third of head length, shorter than postocular region (measured to anterior margin of neck); postocular region in dorsal view shorter than eye, lateral margins gently rounded; length of pedicel subequal to head width; maxillary plates ellipsoidal, adjacent to and shorter than clypeus; apices of maxillary plates in dorsal view directed straight; clypeus in dorsal view wider than maxillary plates; clypeal apex round, not narrowed; interocular glabrous markings anterolaterally curved, joined at interocular sulcus paramedially; interocular sulcus in dorsal view nearly straight; eye width in dorsal view about as wide as synthlipsis; eye reaching ventral head margin in lateral view; ventrolateral swelling of buccula without lateral protrusion that surpasses buccular margin, flat margin; labial segment I in lateral view straight, surpassing posteroventral eye margin; morphologically dorsal surface of labial segment II nearly straight, about 0.5 times length of segment I. Thorax: pronotal collar in dorsal view narrow medially, with anterolateral angles short, flared laterally; anterior pronotal lobe about 0.7 times length of posterior pronotal lobe, lateral margins rounded; glabrous markings on pronotum conspicuous and not depressed; median apodeme depression of pronotum deep, elongated longitudinally; scutellar spine long, subhorizontal; anteriad-directed process of prosternum smoothly rounded, without paramedial lobes; anterior margin of stridulitrum projected into small protuberance; proepimeron with acute protuberance on posteroventral margin. Legs: fossula spongiosa present on fore and mid legs. Abdomen: anterior margin of terga prominently carinulate; terga II and III with paired prominent longitudinal carinae, reaching posterior margin of tergum III. Pygophore ( Fig. 12 ): transverse bridge with rounded posterior margin; posterior region of ventral surface of pygophore in lateral view straight, not swollen; short median apical process, upright in lateral view; lateral pygophore margin with protuberance; posterior pygophore margin with clustered macrosetae on protuberance; parameres sinusoidal, apex tapered into squarely rounded tip. Aedeagus ( Fig. 14 ): endosoma almost entirely covered with spicules; apex of dorsal phallothecal sclerite tongueshaped in dorsal view; basal plate extension 5.6 times as long as wide.

Female

Unknown.

Distribution ( Fig. 20 )

This species is only known from the type locality in Sarawak, Malaysia.

Remarks

The holotype was preserved in ethanol when the abdomen was dissected for DNA extraction. We acquired sufficient DNA in our NGS library for Illumina sequencing for future phylogenomic studies, referred to as DNA voucher R_CW 5472.

Figures

Fig. 1. Strict consensus tree resulting from equal weighting analysis. Jackknife values over 51 are reported for tree one of eight.

Fig. 2. Tree resulting from implied weighting analysis using K = 12 with characters unambiguously optimized. Symmetric resampling values over 51 are represented for trees obtained with K = 3, K = 6, K = 9, and K = 12 analyses. Characters and character states are described in pp. 11–22. Specimens not to scale.

Fig. 7. Dorsal habitus of holotypes of Voconia Stål, 1866 species with distribution: purple = Afrotropical region, green = Australasian region, pink = Oriental region. Scale bars = 3 mm.

Fig. 9. Lateral habitus of species of Voconia Stål, 1866. Scale bars = 3 mm.

Fig. 12. Pygophore of species of Voconia Stål, 1866. Scale bars = 0.5 mm.

Fig. 14. Aedeagus of species of Gerbelius Distant, 1903 and Voconia Stål, 1866. Scale bars = 0.5 mm.

Fig. 20. The distribution of species of Gerbelius Distant, 1903 and Voconia Stål, 1866 in Southeast Asia.