Gibbosella mirabilis, Chłond, Dominik, 2010

Chłond, Dominik, 2010, A new, remarkable genus and two new species of Ectrichodiinae (Hemiptera: Heteroptera: Reduviidae) from Madagascar, Zootaxa 2522, pp. 61-68 : 63-64

Gibbosella mirabilis sp. n. ( Figs 1 , 3, 5, 7, 9, 11 ).

Type material: Holotype – Apterous female: Madagascar Est / Perinet / A. Peyrieras X-1972 [printed]; Museum Paris. [printed on blue label]; Holotype [printed on red label]; Gibbosella / mirabilis n. sp. [handwritten] / det. D. Chłond 2009 [printed].

Description: Colour: Body generally dark brown and brown with pale markings on connexiva ( Fig. 1 ). Head brown with very small pale spots. Apical part of clypeus as well as labial segments pale brown, apical part of third labial segment darker. Transverse sutures of head and antennifers distinctly darker than others parts of head. Eyes black with paler marginal facets. First, second, and third antennal segments brown with paler basal part. Fourth segment dark brown with yellowish base. Pronotum and thorax dark brown with very small, paler spots. Pale spots formed paler markings on anterior pronotal lobe and segments of thorax. Scutellum brown. Coxae and trochanters light-colored. Femora bicolorous, basal 1/3 of fore- and mid-femora and 1/2 of hind femora yellowish as well as apical part of all femora. Fore- and mid-tibiae brown with yellowish basal part. Basal half of hind tibiae yellowish, apical half brown. Tarsi light-colored except dark annulus in apical part of last segment of mid- and hind tarsi. Setae on body pale and light-brown. Hemelytra reduced, dark brown with paler margins. Abdominal tergites dark brown with darker posterior margin. Connexiva bicolorous dark brown with yellowish anterior part; dorsal side with pale, subquadrangular markings restricted only to apical margin; pale markings on ventral side large, subrounded, placed on apical half of each connexiva. Abdomen beneath dark brown with paler middle part of each abdominal sterna. Tip of abdomen dark brown.

Structure: Small, slender, and shining body with very convex anterior lobe of pronotum. Head cylindrical, shining with relatively small eyes and distinctly convex gula. Ocelli absent. Eyes globular in lateral view, placed dorsolaterally. First antennal segments surpassing apex of head by half of its length. First and second antennal segments relatively long. Second, third, and fourth segments with dense, various-sized, erected setae, and distinctly longer, regularly arranged trichobothrial setae. First labial segment as long as second and third together. Second rostral segment very robust, distinctly enlarged. Third segment with medium-sized setae. Second rostral segment surpassing posterior margin of head and reaching anterior margin of anterior pronotal lobe. Anterior pronotal lobe enlarged – elongated and elevated dorsally with very distinct depression in posterior part. Distinctly visible medial, longitudinal sutures on both lobes of pronotum. Posterior pronotal lobe with visible sculpturation connected with medial, longitudinal sutures. Apical part of anterior pronotal lobe with flattened lateral calli in dorsal and lateral view. Scutellum with convergent apices. A few long setae on visible fore- and mid-femora. Hemelytra reduced, triangular in shape with rounded apical margin and depressed ventral angle (connected with scutellum). Intersegmental sclerite with regular posterior margin ( Fig. 11 ). Abdomen shining; in dorsal view distinctly visible lace sculpturation on posterior margin of each tergite as well as sculpturation in lateral part of sternites. Distinct sculpturation visible on dorsal surface of connexiva on each sterna (except II visible sternum). Posterior margin of each tergite distinctly rounded ( Fig. 1 ). In ventral view distinctly visible fold of sternites near lateral margin of abdomen. Tip of abdomen with scarce, various-sized setae.

Genitalia: Valvifer I with rounded indentation in dorsal part and one long setae ( Fig. 7 ). Valvula III short, subquadrangular, and convolute in apical part with medium-sized setae ( Fig. 5 ). Valvula I small with long hairs ( Fig. 9 ).

Measurements (in mm): Body length: 9.5; maximum width of abdomen: 3.95; head length: 2; head width: 1.3; length of anteocular part: 0.95; length of postocular part: 0.6; length of synthlipsis: 0.65; length of antennal segments I:II:III:IV: 1.6: 1.95: 1.05: 0.8; length of labial segments I:II:III: 1.2: 0.8: 0.3; maximum length of anterior pronotal lobe: 1.35; maximum length of posterior pronotal lobe: 0.5; maximum width of anterior pronotal lobe: 1.7; maximum width of posterior pronotal lobe: 1.6; length of scutellum: 0.5.

Male: Unknown.

Distribution: Madagascar ( Fig. 13 ).

Etymology: The name of this species is connected with the very unusual shape of the pronotum.

Figures

FIGURE 1. Gibbosella mirabilis sp. n., holotype, dorsal habitus.

FIGURE 13. Distribution of the genus Gibbosella gen. n. in Madagascar.

FIGURES 3 – 12. Gibbosella mirabilis sp. n.: 3 - pronotum, lateral view; 5 - styloids, outer view; 7 - valvifer I, outer view; 9 - valvula 1, outer view; 11 - intersegmental sclerite, dorsal view. Gibbosella elongata sp. n.: 4 - pronotum, lateral view; 6 - styloids, outer view; 8 - Valvifer I, outer view; 10 - valvula 1, outer view; 12 - intersegmental sclerite, dorsal view.