Vitruvius dobby Roca-Cusachs, Rider & Kment, 2024

Roca-Cusachs, Marcos, Rider, David A., Kment, Petr & Jung, Sunghoon, 2024, Revision of Vitruvius (Hemiptera: Heteroptera: Pentatomidae) with the description of a new species from Cambodia and Thailand, Zootaxa 5486 (3), pp. 419-434 : 426-430

Vitruvius dobby Roca-Cusachs, Rider & Kment , new species

( Figures 2C , 3 , 4 , 5 & 6 )

Type material. Holotype: ♂, “ Thailand. Phetchabun Nam Nao NP., Tham Pra Laad Forest Unit, 16°44.963′N 101°27.833′E, 7–14.viii. 2006, 711 m, N. Hongyothi & L. Janteab leg., Malaise trap T424, DAR_0545” // Vitruvius dobby Roca-Cusachs, Rider & Kment [printed, red label] ( USNM) . Paratypes: THAILAND: Same data as holotype except, DAR_0544 (1♂, MRCB; MRCUCE0073 ) ; Phetchabun, Khao Kho NP., 16°39.589′N, 101°08.185′E, 8–18 January 2007, 168 m, mixed deciduous, Pan trap T1386, S. Chachumnan & S. Singtong leg., DAR_0532 (1♂, DARC) ; Ubon Ratchathani, Pha Taem NP., 15°37.210′N, 105°36.918′E, Entrance of Huay Pok Substation , Malaise trap T2172, L. Sapsiri leg., DAR_0529 (1♂, DARC) ; Chiangmai, Chiangdao hill resort, 28 October 2018, V. Ustinov leg. (1♀, MRCB) . CAMBODIA: Kampong Speu, Chambok 11°21′25″N, 104°7′9″, Day coll., 4.–8.v.2015, leg. J. Constant & V. Sougnez, I.G. 33.022 (1♂ 1♀, ISNB, 1♂, NMPC); Kampong Speu, Chambok 11°21′25″N, 104°7′9″, pitfall trap, leg. J. Constant & V. Sougnez, I.G. 33.022 (1♂, ISNB) ; Pursat Prov., Phnom Samkos, Wildlife Sanct. Forest , 11.–17.v.2005, leg. K. Smets & I. Var (1♀, ISNB) ; Praeh Vihear Prov., BeTreed Adventures , 13°29′44″N 104°42′36″E, GTI Project, 16.–21.x.2017, leg. J. Constant & X. Vermeersch, I.G. 33.551 (1♀, ISNB; 1♀ NMPC) .

Diagnosis. Very similar to V. insignis , somewhat smaller head, pronotal humeri less protruding, with apical angles slightly more rounded, and by the anterolateral borders of the pronotum more at an obtuse angle (declivent) to longitudinal body axis ( Fig. 2A ). The genital capsule ( Fig. 2B ) is narrower (clearly less than two times wider than base over dorsal rim insertion), posterolateral angles acute, projecting caudally, bearing conspicuous tuft of long setae apically, ventral posterior rim laterally sinuous, medially U-shaped, shallow, without tuft of dense setae projecting ventro-medially. Dorsal posterior rim broadly V-shaped.

Description. Male genitalia. Genital capsule ( Fig. 3B ) with apex clearly less than two times wider than base over dorsal rim insertion, posterolateral angles acute, projecting caudally, bearing conspicuous tuft of long setae apically; ventral posterior rim laterally sinuous, medially U-shaped, shallow, without tuft of dense setae projecting ventro-medially; dorsal posterior rim broadly V-shaped. Proctiger elongate, with apical portion narrower than base. Phallus ( Fig. 3C ) with exterior pair of conjunctival processes elongate, finger-like, of similar diameter throughout entire length. Internal conjunctival processes with hook-like apical portion strongly sclerotized. Parameres ( Fig. 3D ) with finger-like process located laterad, slightly curved caudally, apical lobe clearly much broader at apex than at base.

Female genitalia ( Fig. 2D ). Valvifers VIII greatly reduced, partially covered by abdominal segment VII, semicircular, with mesial margins contiguous. Valvifers IX fused, elongate trapezoid, mesially with projection on each posterolateral angle. Laterotergites IX rectangular, elongate, not surpassing apices of laterotergites VIII, rounded at apices. Sternite X quadrate. Laterotergites VIII somewhat triangular with rounded angles, flat at base. Internal genitalia as in generic description ( Fig. 2E ).

Measurements (♂, n = 7 / ♀, n = 4). Total body length: 13.05–18.36/14.02–17.40; abdominal width at hemelytral base: 7.16–9.78/7.45–9.90; maximum abdominal width: 6.65–11.2/7.45–11.60; head length: 1.72–2.32/1.81–1.9; width of head (including eyes): 2.94–3.94/2.94–3.60; anterior head width: 1.96–2.82/2.11–2.50; interocular distance: 1.76–2.46/1.81–2.20; pronotal length: 3.20–3.38/3.33–3.90; maximum pronotal width: 8.04–11.12/8.14–10.40; scutellar length: 5.39–7.8/5.69–7.20; scutellar width at base: 4.31–6.14/4.41–5.29.

Variation. There is a considerable size variation between individuals of the two sexes; females are considerably larger than males (see Measurements). The colouration of the specimens vary from straw yellow specimens with only inconspicuous minute dark brown markings to specimens with prominent dark brown colouration on pronotum, scutellum, clavus and endocorium forming vaguely delimited longitudinal stripes (see Figs 3 & 6 ).

Etymology. The specific name refers to Dobby the house-elf from Harry Potter’s novelistic (and later cinematographic) series, by J. K. Rowling, who was a loving character with which many members of the first author’s generation have grown up with. Noun in apposition.

Distribution. Cambodia!, Thailand!.

Figures

FIGURE 2. Vitruvius insignis Distant, 1901. A—lectotype (1—dorsal view; 2—labels); B—external scent efferent system of the metathotacic glands; C—female genital plates; D—Vitruvius dobby sp. nov., female genital plates; E—V. insignis, female genital plates (internal view) and internal genitalia. Abbreviations: aaf = anterior annular flange; ar = apical receptacle. dr = ductus receptaculi; ir = internal rod of vesicular area; paf = proximal annular flange; pd = pars distalis; pi = pars intermedialis; rs = ring sclerites; va = vesicular area. Scale bar measurements indicated besides each corresponding scale bar. b, c and d of same scale. Orig. Lectotype Maria Tavano (Museo Civico di Storia Naturale di Genova); rest Marcos Roca-Cusachs.

FIGURE 3. Vitruvius dobby sp. nov.A—habitus (1—dorsal; 2—ventral); B—genital capsule (ventral, lateral, dorsal and caudal views); C—phallus (dorsoventral and lateral views); D—right paramere. Abbreviations: ap = finger-like apical process of the paramere; ecp = external conjunctival processes; icp = interior conjunctival process; sap = sclerotized hook-like apical portion of the interior conjunctival process; sr = spermathecal reservoir (outlined in a dashed line); black arrows = spine-like sclerotized processes on each side of segment X. Scale bar measurements indicated besides each corresponding scale bar. Orig. Marcos Roca-Cusachs.

FIGURE 4. Vitruvius dobby sp. nov., structures of head and thorax: A–C—head (A—dorsal view, magnification 37×; B— lateral view, 45×, C—ventral view, 40×); D—thoracic sterna (23×); E—external scent efferent system of the metathoracic scent gland (30×); F—peritreme and ostiole (120×); G—detail of peritreme and evaporatorium (300×). Abbreviations: b = buccula; la1 = labiomere 1; lb = labrum; mes = mesosternum; mp = mandibular plate; mts = metasternum; mys = mycoid surface of evaporatorium; o = ostiole; pes = peritremal surface. Scale bars: A–E—1 mm; F—0.4 mm; G—0.1 mm. Orig. Petr Kment.

FIGURE 5. Vitruvius dobby sp. nov., structures of abdomen: A—spiracle and trichobothria on ventrite VI (magnification 85×); B—detail of trichobothria on ventrite VI (500×); C–F—male genital capsule (C—caudal view, 55×; D—lateral view, 60×; E—dorsal view, 37×; F—ventral view, 42×). Abbreviations: pa = paramere; pla = posterolateral angle of genital capsule; sp = spiracle; tr = trichobothrium; x = proctiger (segment X). Scale bars: A, D—0.5 mm, B—0.1 mm; C, E–F—1 mm. Orig. Petr Kment.

FIGURE 6. Vitruvius dobby sp. nov., variability of colouration.A—female, Cambodia, Kampong Speu, Chambok (11°21′25″N 104°07′09″); B–C—females, Cambodia, Preah Vihear, BeTreed Adventures (13°29′44″N 104°42′36″). Orig. Petr Kment.