The genus Ctenomelynthus (Hemiptera: Heteroptera: Coreidae: Acanthocephalini), with the description of three new species and key to the known species Author Brailovsky, Harry text Zootaxa 2018 4420 4 571 582 journal article 29155 10.11646/zootaxa.4420.4.7 cdd4b871-c712-43cc-b93e-683cce85d722 1175-5326 1455467 E4AA5BB3-9778-4EF5-84F6-0243CF5BCF0E Ctenomelynthus inermibus (Distant) ( Figs. 10–12 ) Petalops inermibus Distant, 1881: 392 –393. Redescription. Male. Dorsal coloration. Head, including the neck, black, tinged with metallic bluish green reflections, space between eye and ocelli, and narrow longitudinal stripe running between ocelli to apex of tylus yellow; antennal segment I dark castaneous, basal third black, segments II–IV dark reddish brown; pronotum shiny castaneous orange, densely tinged with metallic bluish green reflections at collar, anterior lobe, calli, posterolateral and posterior margin; scutellum shiny castaneous orange densely tinged with metallic bluish green reflections; apex yellow; clavus and corium dark castaneous orange with metallic bluish green reflections; hemelytral membrane brown with basal angle darker; connexival segments III–VI yellow, VII yellow with posterior border brown; dorsal abdominal segments pale brown with scars of scent glands IV–V, and V–VI orange. Ventral coloration. Head including buccula and rostral segments I–IV (apex of IV black) yellow to pale yellowish orange; propleura metallic bluish green reflections with anterior spot shiny castaneous orange; meso-, and metapleura shiny castaneous orange with acetabulae and posterior margin densely tinged with metallic bluish green reflections; pro-, meso-, and metasternum shiny castaneous orange; metathoracic peritreme pale orange; each leg shiny pale castaneous orange; spines reddish brown; hind coxae pale castaneous orange with narrow pale brown stripe; abdominal sterna shiny orange with pleural margins yellow; genital capsule shiny orange with lateral angles yellow, and middle third with dark brown irregular spot. Structure. Thorax: triangular process short, acute, not extending beyond anterior border of scutellum; humeral angles rounded. FIGURES 1–10. Ctenomelynthus spp. 1–4, C. brunneiventtris Breddin. 1, Dorsal view (female). 2, dorsal view (male). 3, ventral view (female). 4, lateral view (female). 5–9, C. coxalis Breddin. 5, dorsal view (male). 6, ventral view (male). 7, lateral view (male). 8, ventral view (female). 9, lateral view (female). Female. Color and habitus similar to male. Scutellum shiny castaneous orange with anterior border and apex yellow; clavus and corium pale castaneous orange with scattered metallic bluish green reflections; dorsal abdominal segments pale brown with dark orange marks; pro-, meso-, and metapleura shiny castaneous orange, densely tinged with metallic bluish green reflections; pro-, and meso-acetabulae metallic bluish green with inner border yellow; meta-acetabulae entirely metallic bluish green; abdominal sterna III–VII with seven alternate longitudinal stripe, four yellow and three reddish castaneous; gonocoxa I, and paratergites VIII and IX pale yellowish orange. Measurements. Male. Body length 16.32; head length 1.70; head width across eyes 2.30; interocular distance 1.00, preocular distance 0.91; interocellar distance 0.36; antennal segments: I 3.93, II 3.60, III 3.20, IV 6.61; pronotum: total length 3.20, maximum width across humeral angles 3.50; scutellum: length 2.05, width 1.40. Measurements. Female. Body length 14.77; head length 1.50; head width across eyes 2.20; interocular distance 0.90, preocular distance 0.90; interocellar distance 0.31; antennal segments: I 3.45, II 3.20, III 2.75, IV 6.15; pronotum: total length 2.75, maximum width across humeral angles 3.25; scutellum: length 1.85, width 1.22. . Described from Amazonas (sic) (Distant 1881 ). , Amazonas , Humaita , VIII- 1980 , G. S. Andrade ( UNAM ) ; 1 male , 1 female , Benjamin Constant , Rio Javary , Alto Amazonas (without data), Dirings ( MZSP , UNAM ) . Discussion. This is an attractive species distinguished by having the head entirely pale yellow to pale yellowish orange ventrally; antennal segments II–III dark reddish brown; legs entirely shiny pale orange to pale castaneous orange; pro-, and mesoacetabulae entirely metallic bluish green; and dorsal abdominal segments III–VI pale brown with scars of scent glands IV–V and V–VI orange.