Ctenomelynthus sanchezi Brailovsky, 2018

Brailovsky, Harry, 2018, The genus Ctenomelynthus (Hemiptera: Heteroptera: Coreidae: Acanthocephalini), with the description of three new species and key to the known species, Zootaxa 4420 (4), pp. 571-582 : 577-578

Ctenomelynthus sanchezi Brailovsky sp. nov.

( Figs. 13–14 , 20–21 , 25)

Description. Holotype male. Dorsal coloration. Head, including neck, black, scattered with bluish green reflections, space between eye and ocelli, and narrow longitudinal stripe running between ocelli to apex of tylus yellow; antennal segment I pale castaneous, basal third black, segments II–III pale castaneous, IV dark castaneous; pronotum shiny brick red, densely tinged with metallic bluish green reflections; callar region pale yellowish orange; scutellum dark reddish brown, lateral margins tinged with metallic bluish green reflections, basal angles and apex yellowish orange; clavus pale castaneous orange, area next to the scutellum brown, surface densely tinged with metallic green reflections; corium pale castaneous, densely tinged with metallic bluish green reflections; hemelytral membrane brown, basal angle darker; connexival segments III–VI yellow, VII with upper margin yellow, inner margin black; dorsal abdominal segments III–V pale yellowish orange, scars of scent glands IV–V, and V–VI pale brown, segment VI with anterior half yellowish orange and posterior half black, segment VII black. Ventral coloration. Head black, buccula and longitudinal stripe close to eye yellow; rostral segments I–IV pale castaneous orange (apex of IV black); pro-, meso-, and metapleura shiny reddish brown, densely tinged with metallic bluish green reflections; pro-, and meso-acetabulae shiny black and densely tinged with metallic bluish green reflections, with inner margin yellow; meta-acetabulae and posterior margin of metapleura densely tinged with metallic bluish green reflections; meso-, and metasternum pale castaneous orange; metathoracic peritreme basally black with anterior and posterior lobes yellow; fore and middle legs pale castaneous orange, with coxae reddish brown; hind legs with coxae, trochanters and femora shiny dark reddish brown, tibiae dark castaneous with apex pale yellowish orange, and tarsi pale yellowish orange; abdominal sterna III–VI pale castaneous orange, pleural margins yellow, VII black to reddish brown with pleural margin yellow; genital capsule black to reddish brown, lateral angles yellow. Structure. Thorax: triangular process short, acute, scarcely touching the anterior border of scutellum; humeral angles rounded. Male genital capsule. Posteroventral edge straight, and laterally not exposed (Fig. 25). Parameres. Figs. 20–21 .

Female. Color and habitus similar to male. Abdominal sterna with five alternating longitudinal stripes: three yellowish and two reddish orange; gonocoxae I shiny reddish orange with lateral angles yellow; paratergites VIII and IX yellow with base shiny dark reddish brown.

Variation. 1, rostral segments I–IV pale yellowish orange. 2, pronotum, clavus, corium, pro-, meso-, and metapleura and acetabulae dark reddish brown, and densely tinged with metallic bluish green reflections. 3, dorsal abdominal segments III–V pale yellowish orange, VI pale yellowish orange with posterior margin black, and VII black. 4, metathoracic peritreme black with anterior and posterior lobes yellow. 5, pro-, meso-, and metasternum yellow.

Measurements. Male. Body length 15.54; head length 1.65; head width across eyes 2.38; interocular distance 1.00, preocular distance 0.96; interocellar distance 0.31; antennal segments: I 3.85, II 3.75, III 3.25, IV 7.44; pronotum: total length 3.05, maximum width across humeral angles 3.24; scutellum: length 1.90, width 1.27.

Measurements. Female. Body length 15.52; head length 1.70; head width across eyes 2.35; interocular distance 1.00, preocular distance 0.90; interocellar distance 0.31; antennal segments: I 3.80, II 3.60, III 3.25, IV 7.22; pronotum: total length 2.95, maximum width across humeral angles 3.25; scutellum: length 1.95, width 1.30.

Type material. HOLOTYPE male: FRENCH GUIANA: Point de vue du Belvedere de Saül , 250 m, 3°37’22’’N – 53°12’34’’W, 1-V-2010, collected in piége vitre, S. Brule, P. H. Dalens & S. Fernandez ( UNAM) . PARATYPES: FRENCH GUIANA, 9 males, 8 females, Point de vue Belvedere de Saül , 250 m, 3°37’22’’N – 53°12’34’’W, 1-V-2010, 11-II-2011, 28-VII-2011, 9-IX-2011, 20-XII-2011, 9-23-III-2017, 25-IV-2017, 10-V- 2017, collected with automatic light trap (Blue), matoury automatic light (trap blue) and piége vitre, S. Brule, P. H. Dalens & S. Fernandez ( MNHN, UNAM) ; 1 male, Montagne des Chevaux , 3-III- 2017, P. H. Dalens ( MNHN). VENEZUELA : 1 female, Territorio Federal, Amazonas Department, Rio Negro & Rio Baria , 140 m, 0°55’N – 66°10’W, 13–22 - III-1984, C. Padilla ( UNAM) .

Etymology. Named after Juan Pablo Sanchez Mejia, distinguished Mexican attorney.

Discussion. Related to C. brunneiventris Breddin 1903 in having the head ventrally black with buccula and longitudinal stripe close to each eye yellow, hind coxae and trochanters shiny black to shiny dark reddish brown, and pro-, and meso-acetabulae shiny black and densely tinged with bluish green reflections. In C. sanchezi Brailovsky sp. noV., recorded from French Guiana, and Venezuela, the triangular process of pronotum is short, acute and slightly exposed, the pronotal disk, clavus, corium, pro-, and meso-acetabulae densely tinged with bluish green reflections, the metathoracic peritreme basally black with anterior and posterior lobe yellow, and fore and middle femora pale castaneous orange. In C. brunneiventris distributed in Bolivia and Peru, the triangular process is elongate, broad, conspicuously surpassing the pronotum, reaching the anterior margin of scutellum, the pronotal disk, clavus, corium, pro-, and meso-acetabulae scattered with metallic bluish green reflections, the metathoracic peritreme entirely black and fore and middle femora dark castaneous. Like C. inermibus (Distant 1881) with fore and middle legs pale orange; and meso-, and metasternum yellow to pale orange. In C. sanchezi the head ventrally is black with buccula and longitudinal stripe close to eyes yellow; the antennal segments II–III pale castaneous; the calli yellow; pro-, and mesoacetabulae metallic bluish green with inner margin yellow; the hind trochanter and hind femur shiny dark reddish brown; and dorsal abdominal segments III–VI (posterior margin of VI black) pale yellowish orange. In C. inermibus cited from Brazil, the head ventrally is entirely pale yellow to yellowish orange; the antennal segments II–III dark reddish brown; the calli castaneous orange; the hind trochanter and hind femur entirely shiny pale orange; pro-, and meso-acetabulae entirely metallic bluish green; and dorsal abdominal segments III–VI pale brown with scars of scent glands IV–V and V–VI orange.

Figures

FIGURES 10–17. Ctenomelynthus spp. 10–12. C. inermibus (Distant). 10, dorsal view (male). 11, ventral view (female). 12, lateral view (female). 13–14, C. sanchezi sp. nov. 13, dorsal view (male). 14, lateral view (female). 15–16, C. urbinus sp. nov. 15, dorsal view (female). 16, lateral view (female). 17, dorsal view of C. venustulus sp. nov. (male).

FIGURES 18–23. Parameres of Ctenomelynthus spp. 18–19, C. brunneiventris Breddin. 20–21, C. sanchezi sp. nov. 22–23, C. venustulus sp. nov. 24–26. Male genital capsule of Ctenomelynthus spp. 24, C. brunneiventris Breddin. 25, C. sanchezi sp. nov. 26, C. venustulus sp. nov.