Chryxus bahianus Gil-Santana, Costa & Marques, 2007

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 bahianus Gil-Santana, Costa & Marques, 2007

Figs 1 , 2-9 , 10-12

Note.

Chryxus bahianus was described based on a single male from the State of Bahia, northeastern Brazil. Unfortunately, the holotype of C. bahianus was destroyed on the 2nd of September 2018, during the fire which destroyed most of the zoological collections, including the entire Heteroptera collection of the MNRJ ( Escobar 2018). However, images taken before the fire (Figs 2-4 ) in addition to the drawings presented in the original publication ( Gil-Santana et al. 2007), are useful in providing a better knowledge of the holotype. Additionaly, a female (Figs 10-12 ) from the State of Espírito Santo, a neighbouring state of Bahia, was included to this study.

Type material examined.

Chryxus bahianus , male holotype, Brazil: Bahia: [handwritten labels]: Chryxus / Chryxus bahianus / Gil-Santana et al // Chryxus / Chryxus bahianus / Gil-Santana et. [sic] al. // [printed labels]: QR CODE / MNRJ-ENT3-1056 // BARRO PRETO - BA / BRASIL - xii. 2004 / O. M. Marques leg. [printed red label bordered with black lines]: HOLOTIPO [= holotype] (previously deposited in MNRJ, now destroyed).

Additional non-type material.

Chryxus bahianus , female, Brazil: Espírito Santo: Linhares, Reserva Natural Vale, 19°06'S, 39°45'W, 17.iii.1989, J. S. dos Santos leg., Gil-Santana det. (MNRJ).

Morphological remarks.

Holotype male. Measurements (mm): total length to tip of hemelytra: 3.6; pronotum length: 0.7; hind lobe maximum width: 1.1; abdomen maximum width: 1.2. Coloration (Figs 2 , 3 ): head blackish; brownish on clypeus and adjacent portions; second and third visible labial segments pale brownish and dark yellowish, respectively. Scape and pedicel pale brownish; flagellomeres darkened. Neck reddish brown. Thorax blackish brown; fore coxae pale brownish; supracoxal lobes and approximately distal two thirds of middle and hind coxae dark yellowish; trochanters pale; remaining portions of legs pale brownish; femora with faint dark narrow rings on subbasal and subapical positions. Hemelytra: clavus dark brownish; corium whitish, with a subbasal dark spot and dark at approximately apical half; membrane pale brownish with two whitish markings, a basolateral spot just after apex of corium and a whitish stripe adjacent to inner margin, contiguous with whitish portion of corium, going from basal portion, shortly invading discal cell, narrowing at midportion, and enlarged at inferodistal portion; veins darkened. Abdomen. Connexivum with approximately distal third of segments III-VI darkened. Sternites reddish brown, darkened on lateral portions. Vestiture formed by golden long setae, sparse on head and thorax and somewhat more numerous on sternites (Figs 2 , 3 ). Longer curved setae on clypeus and adjacent portion; lateral angles of pronotal collar with a single conspicuous, long, somewhat curved seta inserted in a small elevation. Structure (Figs 2 , 3 ). Integument shiny, except dull hemelytra. Pronotum: integument generally smooth; lateral angles slightly prominent; a series of canaliculae behind anterior collar, larger at median portion; median sulcus running from just before transverse furrow to about posterior third of pronotum, larger at basal portion, where it is canaliculated, narrowing towards distal portion; transverse furrow enlarged, formed by canaliculae. Scutellum obliquely elevated and enlarged at its apex. Femora slightly thickened, fore femora a little more thickened than others; hind tibiae straight; hemelytra slightly surpassing posterior margin of abdomen. Connexival segments II-V with posterolateral acute prominences, which are progressively smaller towards distal segments. Sternite II with a shallow keel, on basal portion.

Male genitalia (Figs 5-9 ). Pygophore covered by numerous setae on exposed portion, in ventral view suboval to subsquare in shape, in lateral view dorsal margin almost straight and ventral margin rounded; medial process of pygophore thin, long, straight, spiniform in anterior and posterior views (Fig. 5 ), and moderately curved and more thickened in lateral view; parameres symmetrical, generally covered with moderately curved, thin, short to elongate setae (except glabrous basal (inserted) portion), enlarged at approximately middle third, on its inner face medially with a subquadrate laminar process with curved distal margin (Figs 6 , 7 ). Phallus (Figs 8 , 9 ): articulatory apparatus with short basal plate arms (bpa); pedicel (pd) elongated, curved in lateral view. Dorsal phallothecal sclerite (dps) faintly sclerotized, subrectangular; struts (st) fused to each other, quite enlarged at middle portion, narrowed towards distal third. Process of endosoma (pe) formed by a paired subparallel series of faintly sclerotized thickenings.

Female. Measurements (mm): total length to tip of abdomen: 3.7, to tip of hemelytra: 3.5; head length (excluding neck): 0.5; length of anteocular portion: 0.15; length of postocular portion: 0.05; width across eyes: 0.7; interocular distance (synthlipsis): 0.4, width of eye: 0.15; length of eye: 0.3; lengths of antennal segments: I: 0.2; II: 0.6; III: 0.4; IV: 0.3; lengths of labial segments: first visible: 0.17; second visible: 0.15; third visible: 0.17. Thorax: pronotum: fore lobe length (at midline): 0.3, (sublaterally, where it is maximum): 0.32; maximum width: 0.7; hind lobe: length: 0.4; maximum width: 1.1; scutellum, total length: 0.55; width at base: 0.6; length of hemelytra: 2.4. Fore legs: length of femur: 0.7; length of tibia: 0.7; length of spongy fossa: 0.15; length of tarsus (claws excluded): 0.35; middle legs, length of femur: 0.7; length of tibia: 0.8; length of tarsus (claws excluded): 0.3; hind legs: length of femur: 1.0; length of tibia: 1.2; tarsus absent. Abdomen, length: 1.9; maximum width: 1.3. Generally similar to male (Figs 10 , 11 ). Setae generally less numerous and shorter. Head: second and third visible labial segments brownish and pale brownish, respectively. Thorax: median portion of pronotum somewhat paler; supracoxal lobes pale brownish; pleural and sternal integument generally darker, blackish; coxae dark brownish; subbasal dark ring on hind femora indistinct; fore femora slightly more thickened. Hemelytra not attaining posterior margin of abdomen (Fig. 10 ); veins generally darkened, except whitish inner vein of corium meeting upper portion of discal cell and respective vein enclosing pale portion of discal cell (Fig. 10 ). Abdomen: intersegmental sutures between sternites very curved at median portion (Fig. 11 ). Sternite VII quite larger than preceding segments, somewhat more than twice longer at midline than sternite VI (Fig. 11 ). Female genitalia. Posterior view (Fig. 12 ): light brownish, gonapophysis IX somewhat paler. Syntergite IX/X large, horizontal, as inverted subtrapezoidal; gonocoxa VIII elongate, moderately curved; gonapophysis VIII subrounded; gonapophysis IX arciform.

Distribution

(Fig. 1 ). Brazil, states of Bahia and Espírito Santo.

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 2 - 9. Chryxus bahianus Gil-Santana, Costa & Marques, 2007, male holotype, previously deposited in MNRJ 2 dorsal view 3 lateral view 4 labels 5 - 9 male genitalia 5 apex of pygophore and medial process of pygophore (pointed by arrows), posterior view 6, 7 paramere; laminar process pointed by an arrow 6 lateral view 7 inner surface 8, 9 phallus 8 lateral view 9 with endosoma and dorsal phallothecal sclerite set apart. Abbreviations: bpa basal plate arm, dps dorsal phallothecal sclerite, pd pedicel, pe process of endosoma, st struts. Scale bars: 1.0 mm (2, 3); 0.1 mm (5 - 9).

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).