Canthophorus impressus
Creators: name: Gapon, Dmitry A.
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cydnidae
Canthophorus
Canthophorus impressus

description: Canthophorus impressus (Horváth, 1880)
(Figures 1 E, 1 F, 3 F, 3 G, 5 A, 6 N, 6 O, 7 G, 7 H, 8 J –8 L, 10 A –10 C, 12 C, 12 D)
Sehirus impressus Horváth 1880: 184 [lectotype: female, Austria, Carinthia].
Canthophorus impressus: Signoret 1881: 657.
? Canthophorus dubius var. brevipennis Signoret 1884: 56.
Description
Lateral margins of pronotum and corium with yellowish narrow stripe; anterior angles of ventrites and connexival laterotergites with yellowish spots. Metapleural evaporatorium with long and curved peritreme. Membrane brownish or whitish.
Pygophore as long as wide, with lateral walls less concave, with shorter, less concave dorsal infolding, and with longer dorsal wall than in C. melanopterus.
Paramere. Sensory process rather shorter and slightly more curved dorsally than in two previous species (Figure 3 F, 3 G).
Aedeagus (Figure 5 A). Ventral lobe of conjunctiva extending to but not protruding beyond apical margin of theca, rather broad, gradually and slightly narrowing apically in ventral view, at extreme apex rather broadly widened, with widely rounded lateral margins and sharply rounded lateroapical angles; apical margin of lobe with rather deep triangular notch and ventral surface of lobe near this notch with small triangular impression (Figure 6 N); in lateral view, lobe narrow (Figure 6 O). Curved apical part of conjunctiva slightly shorter than in two previous species. Apical lobes long, entirely lying in dorsoventral plane of apical part of conjunctiva, basally directed laterad and curved posteriad before middle. Vesica without lateral branch. Dorsolateral lobes short and rather narrow, with slightly spaced bases, separated by shallow depression, directed dorsolaterad and curved towards base of aedeagus. Walls of dorsolateral lobes without areas of sclerotisation at sides. Spicules at dorsolateral lobes moderately long, rather longer than in two previous species, but shorter than in remaining species, thin, slightly thickened at base and tapering to acute apices, smoothly or rather sharply arcuately curved in middle (Figure 7 G, 7 H), and directed dorsoposteriad. Spicule basal plate rather short, without denticles (Figure 7 G, 7 H).
Gynatrium (Figure 10 A). Posterior pouches of gynatrial sac lying anterior to or exactly on posterior margin of gynatrial sac, rather small, no more than 2 times longer than wide or as long as wide, with thick, widely rounded apical wall, and directed posteriad or lateroposteriad (Figure 10 B, 10 C). Dorsal walls of pouches at base not convex; interior walls without distinct sclerites, very rarely with only small shapeless areas of sclerotisation (as shown at Figure 10 B) [probably, these areas of sclerotisation are the result of injuring the walls of the posterior pouches by the aedeagal spicules during copulation]. Posterior wall of gynatrial sac near bases of pouches without convex areas (Figure 12 C, 12 D). Anterior part of gynatrial sac relatively shorter and narrower than in two previous species. Proximal part of spermathecal duct slightly longer than shortened median part or latter rather long and proximal part as long as or slightly shorter, less often strongly shorter than half of median part; distal part of duct approximately as long as half of median part or slightly longer than it. Proximal tubular part of spermathecal capsule 2–3 times as long as transverse diameter of its distal spherical part, curved, but not gyrose. First rami rather widened anteriorly, widely and evenly rounded (Figure 8 J), less often acute-angled (Figure 8 K) of narrowly rounded (Figure 8 L) at anterior ends.
In one female from Tuva, posterior pouches formlessly sclerotised apically, dorsal wall of left pouch with narrow longitudinal sclerotised line, dorsal wall of right pouch with isolated triangular sclerotised patch at base.
Notes on distribution
The species is recorded for the first time for Georgia, Azerbaijan, Turkey, Kyrgyzstan, Russian Far East [?], and China (Sichuan) [?].
description: Published as part of Gapon, Dmitry A., 2018, Morphology of male and female terminalia and taxonomic revision of the burrower bugs genus Canthophorus (Heteroptera: Cydnidae), pp. 183-228 in Annales de la Société entomologique de France (N. S.) (N. S.) 54 (3) on pages 29-30, DOI: 10.1080/00379271.2018.1467788, http://zenodo.org/record/14927017