Chryxus garcetebarretti, Gil-Santana & Leavengood Jr. & Bérenger & Martins & Oliveira, 2022

Gil-Santana, Helcio R., Leavengood Jr., John M., Berenger, Jean-Michel, Martins, David dos Santos & Oliveira, Jader, 2022, A new species of Chryxus Champion, with taxonomic notes on other species of the genus (Hemiptera, Heteroptera, Reduviidae, Chryxinae), ZooKeys 1104, pp. 159-175 : 159

Chryxus garcetebarretti sp. nov.

Figs 1 , 13-18 , 19-24 , 25-28

Type material examined.

Chryxus garcetebarretti sp. nov., female holotype: Paraguay: Misiones Dept.: San Ignacio, vic. Hotel Rural, 26°52.508'S, 56°59.355'W, 1.479 m.a.s.l., 5-8.xii.2019, Eger, Tyson & Leavengood leg. (FSCA).

Description.

Holotype female. Measurements: total length to tip of abdomen: 4.23; to tip of hemelytra: 4.04; head (excluding neck) length: 0.33; length of anteocular portion: 0.06; length of postocular portion: 0.07; width across eyes: 0.87; interocular distance (synthlipsis): 0.52; width of eye: 0.19; length of eye: 0.30; lengths of antennal segments: I: 0.36; II: 0.76; III: 0.61; IV: 0.67; lengths of labial segments: first visible: 0.29; second visible: 0.23; third visible: 0.09. Thorax: pronotum: fore lobe, length (at midline): 0.33, (sublaterally, where it is maximum): 0.39; maximum width: 0.93; hind lobe: length: 0.54; maximum width: 1.39; scutellum, total length: 0.72; width at base: 0.83; length of hemelytra: 2.88. Fore legs: length of femur: 0.98; length of tibia: 0.77; length of spongy fossa: 0.17; length of tarsus (claws excluded): 0.29; middle legs, length of femur: 1.08; length of tibia: 0.95; length of tarsus (claws excluded): 0.34; hind legs: length of femur: 1.22; length of tibia: 1.47; length of tarsus (claws excluded): 0.36. Abdomen, length: 2.34; maximum width: 1.74. Coloration (Figs 13 - 27 ): head blackish; labium brownish; scape and pedicel pale brownish, apical portion of pedicel darkened; flagellomeres darkened, basal portion of basiflagellomere paler. Thorax blackish; posterior margin of pronotum slightly paler; sclerite below basoposterior margins of scutellum reddish brown; meso- and metasterna blackish brown; coxae brown and pale on basal and distal halves respectively; trochanters pale orange to pale yellowish; legs brownish, femora pale at basal portion and largely dark to blackish at median portion; tarsi pale yellowish. Hemelytra: corium mostly blackish, basal third yellowish and whitish on anterior and posterior halves, respectively; membrane dark brownish, veins concolorous; two faint pale rounded spots just around discal cell, one basolateral just after apex of corium and another inferomedial, adjacent to inner margin. Abdomen. Connexivum dark brownish with narrow pale distal yellowish bands, which include the respective intersegmental suture; pale band between segments III and IV extending on basal portion of the latter too. Sternites blackish at lateral portion and reddish brown at median portion. Vestiture. Conspicous lateral clusters of setae at each connexival intersegmental suture, ventrally; the most dense of which between segments VI and VII (Figs 14 , 26 , 27 ). Structure (Figs 13 - 27 ). Pronotum: integument generally smooth; lateral angles slightly prominent; median sulcus narrow, margins tortuous, running from transverse furrow to near posterior margin; transverse furrow narrow. Process of scutellum with a narrow sulcus between elevated margins; apex not elevated and slightly thickened. Hind tibiae slightly curved at distal third. Connexivum with a continuous uniform margin. Intersegmental sutures between sternites very curved at median portion. Sternite VII quite larger than preceding segments, somewhat more than four times at midline than sternite VI. Female genitalia. Posterior view (Fig. 28 ): pale brownish with scattered darker portions. Tergite IX large, horizontal; tergite X small, surrounded by tergite IX, except posterior margin; gonocoxa VIII elongate, moderately curved; gonapophysis VIII pointed laterally at median portion; gonapophysis IX claviform.

Distribution

(Fig. 1 ). Paraguay, department of Misiones.

Etymology.

The new species is named in honor of Dr. Bolívar Rafael Garcete-Barrett (Curator of Entomology of the "Museo Nacional de Historia Natural del Paraguay", San Lorenzo, Paraguay) for his great contribution to Entomology and specially for his indispensable help which resulted in the collection of the holotype of C. garcetebarretti sp. nov.

Comments.

The inclusion of C. garcetebarretti sp. nov. in Chryxus is in accordance with the characteristics assigned to this genus ( Champion 1899; Gil-Santana et al. 2007), whereas the diagnostic characteristics recorded (see key below) seem to justify considering it as a species different from its congeners. Besides the general characteristics stated in the key, in regard to C. bahianus , the species to which C. garcetebarretti sp. nov. seems closer, the coloration of the hemelytra are different between them too. Corium mostly blackish, with basal third yellowish and whitish on anterior and posterior halves, respectively in C. garcetebarretti sp. nov. and whitish, with a subbasal dark spot, approximately apical half dark below the whitish area, giving the impression of a transverse pale band in C. bahianus . In C. garcetebarretti sp. nov., pale markings on membrane faint, that adjacent to the inner margin, just below discal cell, not including a portion of the latter, small and rounded, while in C. bahianus , pale markings of membrane more marked, whitish; that adjacent to inner margin, larger, forming a whitish stripe, contiguous with the whitish portion of the corium, going from the basal portion, shortly invading the discal cell, narrowing at midportion and enlarged at the inferodistal portion. Yet, the features of the female genitalia, as seen in posterior view (Fig. 28 ), are also distinctive in relation to the other species (Figs 12 , 32 ), including C. bahianus , whereas the female genitalia of the latter species seems more similar to that of C. tomentosus .

Figures

Figure 1. A general map of South America and a small portion of Central America (Panama, purple color) showing occurrence points of species of Chryxus: C. bahianus (red circles) in the States of Bahia and Espirito Santo of Brazil (pale green color); C. garcetebarretti sp. nov. (blue square) in Paraguay (pink color), and C. tomentosus (yellow triangles) in French Guiana (blue color), Guyana (orange) (marked randomly in the middle of the country; exactly location not recorded), and Panama (purple).

Figures 13 - 18. Chryxus garcetebarretti sp. nov., female holotype 13 dorsal view 14 ventral view 15 lateral view 16 head, pronotum and basal portion of scutellum, dorsal view 17, 18 head and fore lobe of pronotum 17 dorsolateral view 18 frontal view.

Figures 19 - 24. Chryxus garcetebarretti sp. nov., female holotype 19, 20 head and fore lobe of pronotum 19 dorsolateral view 20 dorsoposterior view 21 head and foreleg, lateral view 22 head and fore coxae, ventral view 23 hind lobe of pronotum, scutellum and basal portion of hemelytra, dorsal view 24 apex of fore tibia, tarsus and a portion of an eye and antennal scape.

Figures 25 - 28. Chryxus garcetebarretti sp. nov., female holotype 25 apex of fore tibia and scape, lateral view 26, 27 abdomen, ventrolateral view 28 external genitalia, posterior view. Abbreviations: t IX tergite IX, t X tergite X, gc VIII gonocoxa VIII, gp VIII gonapophysis VIII, gp IX gonapophysis IX.

Figures 10 - 12. Chryxus bahianus Gil-Santana, Costa & Marques, 2007, female specimen from Espirito Santo State, Brazil 10 dorsal view 11 ventral view 12 external genitalia, posterior view, schematic drawing, setation omitted. Abbreviations: sy IX / X syntergite IX / X, gc VIII gonocoxa VIII, gp VIII gonapophysis VIII, gp IX gonapophysis IX. Scale bars: 1.0 mm (10, 11); 0.1 mm (12).

Figures 29 - 32. Chryxus tomentosus Champion, 1899, females from French Guiana 29 dorsal view 30 ventral view 31 specimen from Mont Itoupe, dorsal view 32 external genitalia, posterior view, SEM image. Abbreviations: sy IX / X syntergite IX / X, gc VIII gonocoxa VIII, gp VIII gonapophysis VIII, gp IX gonapophysis IX. Scale bars: 1.0 mm (29 - 31).