Sirthenea (Sirthenea) nigra Cai & Tomokuni, 2004

Chłond, Dominik, 2018, A taxonomic revision of the genus Sirthenea (Hemiptera: Heteroptera: Reduviidae) of the Old World, Zootaxa 4520 (1), pp. 1-85: 58-61

publication ID

publication LSID

persistent identifier

treatment provided by


scientific name

Sirthenea (Sirthenea) nigra Cai & Tomokuni, 2004


Sirthenea (Sirthenea) nigra Cai & Tomokuni, 2004  

( Figs. 113–121 View FIGURE 113 View FIGURES 114–121 , 179 View FIGURES 169–182 , 206 View FIGURES 205–208 , Map 11)

Sirthenea nigra Cai & Tomokuni, 2004: 89   . Holotype (♂): Pha Din Pass : Vietnam; NSMT.

Sirthenea nigra: Chłond (2008a: 385)   .

Sirthenea nigra: Chłond (2008b: 139)   .

Type material examined: Holotype, Ƌ: 4.V.95 [handwritten by pencil], 71[in the circle, handwritten by pencil] / Pha Din Pass. / 1400m L.T. [handwritten by pencil] ( NSMT).  

Other material examined: Laos: 4 ƋƋ: Lao–NE, Hua Phan prov., / ~ 20°12'N 104°01'E, / Phu Phan Mt., 1500– / 1900m, 17.v.–, Vit. Kubáň leg. [printed]; Entomological expedition / „Laos 2007” / Moravian Museum Brno / Czech Republic [printed] ( MMBC) GoogleMaps   . Malaysia: 2 ƋƋ: Malaysia W., Pajiang / 50 km NE of Kuala Rompin / Endau Rompin Nat.P., 400m / G.Keriung. (Kg. Tebu Hitam) / 9.–30.iv.2008, P.Cechovsky lgt. [printed]; Sammlung–Collection / Ernst Heiss / Innsbruck—Austria [printed] ( TLMF)   .

Diagnosis. This species is similar to S. caiana   and S. nitida   but can be easily distinguished from those two species by the not enlarged basal part of second visible labial segment, the U-shaped posterior margin of an eye in lateral view, the bulbous median process of the pygophore and dark coloration of the body (black or dark brown) with paler middle part of connexives.

MAP 11. Distribution of Sirthenea nigra Cai & Tomokuni, 2004   .

Redescription: Color: Body black to dark brown ( Figs. 113 View FIGURE 113 , 206 View FIGURES 205–208 ). Basi- and distiflagellum dark brown to yellowish. Second and third visible segments slightly paler. Posterior pronotal lobe slightly paler than anterior lobe. Hemelytron with barely visible paler markings (dark yellowish) in basal part. Coxa dark or with paler apical part. Fore femur pale with dark base, apex and longitudinal lines on ventral and dorsal surfaces. Middle and hind femur dark with pale base and apex. Middle and hind tibia dark with pale base. Tarsus brownish. Connexives grayish with dark margins. Abdomen beneath brown (except dark sternite of II abdominal segment), distinctly paler than thorax. Pygophore with paler parameres.

Structure: Body medium-sized, slender with shinning head, pronotum, scutellum and costal margin. Head, scape, pronotum, scutellum, meso- and metathoracic sterna, legs and abdomen beneath with long setae. Dorsal surface of antenniferes corrugated. Pedicel and distiflagellum with rather short, dense setae. Scape, club-shaped with 4 trichobothrial setae ( Fig. 179 View FIGURES 169–182 ). Corium with short setae. Eyes and ocelli large, eyes narrower than synthlipsis. Posterior margin of an eye U-shaped. Anteocu1ar part of head about 2.83–3.39 times as long as postocular part. Apodeme depression of head shallow, transversal furrow deep. Ridges proepisternum and proepimeron not connected in entire length. Pedicel, basi- and distiflagellum subequal in length. Second visible labial segment, not enlarged basally, surpassing posterior margin of eyes. Anterior pronotal lobe with distinct collar, sculptured with median and lateral longitudinal sulci. Sulci granulated and dull. Anterior pronotal lobe with short, wide and deep apodeme depression. Posterior pronotal lobe sculptured, with distinct depression in middle of anterior margin. Metapleura with two complete ridges. Scutellum with long setae, and distinctly enlarged lateral margins. Hemelytron with distinct sculpturation on costal margin, surpassing apex of abdomen. Abdomen with spiracles III–IV placed close to ventral connexival suture. Lateral parts abdominal sternites with distinct sculpturation.

Genitalia: Median process of pygophore bulbous, delicately bent, apex rounded ( Fig. 114 View FIGURES 114–121 ). Paramere broad, triangular ( Figs. 115–118 View FIGURES 114–121 ). Right paramere slightly longer and narrower than left paramere ( Figs. 117, 118 View FIGURES 114–121 ), apex of inner side of right paramere with a small sharp process ( Fig. 118 View FIGURES 114–121 ), apex of inner side of left paramere with a tubercular process ( Fig. 116 View FIGURES 114–121 ). Basal plate of aedeagus robust and slightly longer than basal plate bridge ( Fig. 121 View FIGURES 114–121 ), pedicel bent ( Figs. 119–121 View FIGURES 114–121 ). Pedicel relatively robust and bent laterally ( Figs. 119, 120 View FIGURES 114–121 ); dorsal phallothecal sclerite strongly enlarged on right side ( Fig. 121 View FIGURES 114–121 ); apical portion of right side of phallotheca wrinkled ( Fig. 121 View FIGURES 114–121 ), endosomal processes visible on left side of aedeagus in resting position.

Measurements (in mm): Body length:17.4–17.5; maximum width of abdomen: 4.2–4.4; head length: 3.0; head width: 1.7–1.8; length of anteocular part: 1.6–1.7; length of postocular part: 0.5–0.6; length of synthlipsis: 0.6–0.7; interocellar distance: 0.4–0.5; lengths of antennal segments I:II:III:IV: 0.9–1.0: 2.0–2.1: 1.6–1.7: 2.0–2.1; length of visible labial segments I:II:III: 0.8–0.9: 2.0–2.2: 0.8–1.1; maximum length of anterior pronotal lobe: 2.2–2.4; maximum length of posterior pronotal lobe: 1.3–1.6; maximum width of anterior pronotal lobe: 2.5–2.8; maximum width of posterior pronotal lobe: 3.6–3.7; length of scutellum: 1.5–1.6; length of hemelytron: 11.3–11.9.

Female: Unknown.

Distribution: Laos, Malaysia, Vietnam (Map 11).


National Science Museum (Natural History)


Moravske Muzeum [Moravian Museum]


Tiroler Landesmuseum Ferdinandeum














Sirthenea (Sirthenea) nigra Cai & Tomokuni, 2004

Chłond, Dominik 2018

Sirthenea nigra: Chłond (2008a: 385)

Chlond, D. 2008: 385

Sirthenea nigra: Chłond (2008b: 139)

Chlond, D. 2008: 139

Sirthenea nigra

Cai, W. & Tomokuni, M. 2004: 89