Montina tikuna Mejía-Soto & Forero, 2022

Mejía-Soto, Andrés, Forero, Dimitri & Wolff, Marta, 2022, Taxonomic revision of Montina (Hemiptera: Heteroptera: Reduviidae) from Colombia with description of three new species, Acta Entomologica Musei Nationalis Pragae 62 (2), pp. 325-381 : 357-360

Montina tikuna Mejía-Soto & Forero sp. nov.

( Figs 23 ; 25F ; 27F ; 29F ; 42 )

Type locality. Colombia, Amazonas, Parque Nacional Natural Amacayacu.

Type material. HOLOTYPE: COLOMBIA: AMAZONAS: 1 ♀, PNN [Parque Nacional Natural] Amacayacu ; [03.8202°N, 70.2630°W]; 125m; 27 Sep 1993; A. Cárdenas leg.; MPUJ_ENT0058525 / (red label) HOLOTYPE Montina tikuna Mejía & Forero , sp. nov. ( MPUJ). PARATYPE. COLOMBIA: AMAZONAS: 1 ♀, PNN [Parque Nacional Natural] Amacayacu ; [03.8202°N, 70.2630°W]; 120m; 25 Sep 1993; Quinteros leg.; MPUJ_ENT0058510 ( MPUJ) .

Diagnosis. Total length, females 21.2 mm (n = 2). General coloration reddish-brown, scutellum and abdomen dark brown to black; membrane translucent yellow ( Fig. 23B ); pronotal anterolateral angles reduced and obtuse ( Figs 23B, D ); tubercle of anterior pronotal lobe thick, subconic, strongly curved anteriad, apex obtuse ( Fig. 21C ); elevation of the carina of the posterior pronotal lobe prominent, posterior margin slightly rounded ( Fig. 23C ); posterolateral process prominent, acute, slightly curved ( Fig. 23B ); connexival margin nearly straight, segments 2–4 with small posterior acute process, 5–6 with obtuse process ( Fig. 23A ); ventral laterotergites only with black scattered erect setae, in contrast to silver to gold decumbent setae on abdominal sternites ( Figs 23E, F ); bursa copulatrix without U-shaped sclerotization on dorsal region ( Fig. 29F ).

Description. Male. Unknown.

Female. Total length 21.2–22.0 mm, head length 3.9–4.0 mm, length of the anterior lobe of the pronotum 1.0– 1.1 mm, length of the posterior lobe of the pronotum 3.7–3.8 mm, width of the abdomen 6.0– 6.1. mm (n = 2). COLORATION. Head brown, postocular area reddish brown ( Fig. 23D ); labial segments brown, tip of the last segment dark brown. Thorax: Pronotum brown with transverse sulcus dark brown, posterior pronotal margin and humeral angles redder and darker ( Fig. 23B ); prosternum brown, darker than the head; mesosternum dark brown; metasternum, meso- and metacoxa dark grey; scutellum dark brown to black with the apex lighter. Legs: Procoxa reddish brown, meso- and metacoxa dark grey; remaining segments reddish-brown. Hemelytron: Corium brown, anterior margin (R+M) red; membrane golden. Abdomen: Sternites, dorsal and ventral laterotergites dark brown to black; genitalic sclerites same color as remaining abdomen. VESTITURE. Moderately setose body. Head covered mainly by very short, golden setae with few black erect, medium, and long sized setae, located mainly dorsally of the postocular area and clypeus. Thorax covered by medium, golden setae with the tubercles of the anterior lobe and the lateral margins glabrous; posterior lobe with lower setae density. Lateral margins of the scutellum densely covered by long, thick, and black setae, dorsally in smaller proportion; apex with few golden setae. Pro- and mesofemur with erect, medium, and long setae dorsally and laterally; pro- and mesotibia ventrally with medium-thick setae, similar to a comb; hind leg covered by erect medium setae. Abdomen: Sternites with a fringe of erect black setae near posterior margin of segments 4–6, in ventral view setal patch with falciform shape, surrounding setae decumbent, golden to silver, and few sparse erect black setae; ventral laterotergites with sparse black erect setae; sternites silver to gold decumbent setae ( Figs 23E, F ). STRUCTURE. Head very elongated, length/width ratio = 2.4; eyes globular, prominent in dorsal view, ovoid in lateral view with posterior margin nearly straight. Thorax: Anterolateral angles with reduced and flattened tubercles; discal tubercles of anterior pronotal lobe thick, subconic, strongly curved anteriad, apex obtuse; posterior pronotal lobe elevation of carina prominent, posterior margin slightly rounded ( Fig. 23C ); posterolateral process apically sharp and slightly curved backwards. Abdomen: Margin of connexival segments nearly straight, segments 2–4 with small posterior acute process, 5–6 with obtuse process ( Fig. 23E ). Female genitalia: Gonocoxa 8 with posterior margin (pm) concave, posterior medial angle truncated, oblique, and curvature at end of anterior area prolongation shallow ( Fig. 25F ); gonoplac (gpl) with markedly divergent distal region beyond joining area, apex acute with setae on outer margin; bursa copulatrix trapezoidal ( Fig. 27F ), with narrow basal area; lateral lobes (lbs) narrow, not exceeding margin of anterior portion ( Fig. 27F ); dorsal region of bursa without U-shaped sclerotization ( Fig. 29F ).

Differential diagnosis. Montina tikuna sp. nov. is very similar to M. distincta and M. fumosa in the overall brown coloration and the nearly straight margin of the connexivum. Montina tikuna sp. nov. can be easily differentiated by the entirely black coloration of the abdomen ( Fig. 23E ), the ventral laterotergites only with black erect scattered setae without decumbent golden setae ( Fig. 23F ), and the bursa lacking a U-shaped sclerotization on the anterior dorsal region ( Fig. 29F ). Montina distincta has the ventral laterotergites with a medial black band ( Figs 9A, C ) and M. fumosa has at least the dorsal laterotergites 6 and 7 pale-yellow ( Figs 11A, C ). In both M. distincta and M. fumosa the ventral laterotergites have a mix of both erect and decumbent setae. With regard of the anterior area of the bursa copulatrix, it is sclerotized in the remaining species except M. ruficornis ( Fig. 29C ).

No males have been found for Montina tikuna sp. nov., which is not unusual because females were almost three times more common than males, at least based on the examination of specimens deposited in collections. Male specimens found close to the type locality all belonged to either M. distincta or M. fumosa , and none presented the vestiture and coloration characteristic of the abdomen of M. tikuna sp. nov. We hypothesize that the male genitalia will have characters that will help distinguish this species. Etymology. This new species is named after the Tikuna indigenous people, which inhabit areas of Brazil, Peru, and Colombia, including the Amacayacu National Park, where the new species was found. Their name “Tikuna” is translated as “man” and “black” because of the custom of the people to paint their bodies with black pigment (MORA & ZARZAR 1997). The coloration of the abdomen of M. tikuna sp. nov. is completely black whereas the rest of the body is reddish-brown, reminiscent of the paint use by the Tikuna people. The name is treated as a noun in apposition.

Distribution. Colombia, only known from a single locality in the Amazonas department at 120 m ( Fig. 42 ).

Figures

Fig. 23. Montina tikuna Mejía-Soto & Forero sp. nov., female holotype.A – lateral view. B – dorsal view. C – pronotum, lateral left view. D – head, dorsal view. E – abdomen, lateral right view. F – detail of the vestiture of the abdomen on sternites and ventral laterotergites. Scale bar: 1 mm.

Fig. 25. Montina spp., external female genitalia, ventral view.A – M. gladiator Mejía-Soto & Forero sp. nov.; B – M. lobata Stål, 1859; C – M. ruficornis (Fabricius, 1803); D – M. scutellaris Stål, 1859; E – M. testacea (Stål, 1859); F – M. tikuna Mejía-Soto & Forero sp. nov. Scale bar: 1 mm.

Fig. 27.Montina spp., bursa copulatrix, dorsal view.A – M. gladiator Mejía-Soto & Forero sp. nov.; B – M. lobata Stål, 1859; C – M. ruficornis (Fabricius, 1803); D – M. scutellaris Stål, 1859; E – M. testacea (Stål, 1859); F – M. tikuna Mejía-Soto & Forero sp. nov. Scale bar: 1 mm.

Fig. 29. Montina spp., detail of the anterior portion of the bursa copulatrix, dorsal view. A – M. gladiator Mejía-Soto & Forero sp. nov.; B – M. lobata Stål, 1859; C – M. ruficornis (Fabricius, 1803); D – M. scutellaris Stål, 1859; E – M. testacea (Stål, 1859); F – M. tikuna Mejía-Soto & Forero sp. nov. Scale bar: 1 mm.

Fig. 42. Distribution map of Montina ruficornis (Fabricius, 1803), M. scutellaris Stål, 1859, M. testacea (Stål, 1859), and M. tikuna Mejía-Soto & Forero sp. nov. in Colombia.

Fig. 21. Montina testacea (Stål, 1859). A – male, lateral view. B – female, dorsal view. C – female, lateral view. D – male, dorsal view. E – pronotum, male, lateral left view. F – abdomen, male, lateral left view. G – detail of the vestiture of abdominal sternites. Scale bar: 1 mm.

Fig. 9. Montina distincta (Stål, 1859). A – male, lateral view; B – male, dorsal view; C – female, lateral view; D – female, dorsal view; E – pronotum, female, lateral left view; F – pronotum, male, lateral left view. Scale bar: 1 mm.

Fig. 11. Montina fumosa (Stål, 1867). A – male, lateral view; B – male, dorsal view; C – female, lateral view; D – female, dorsal view; E – pronotum, male, lateral left view; F – scutellum. Scale bar: 1 mm.