Holcostethus, Fieber, 1860

Belousova, E. N., 2007, Revision of the shield-bug genera Holcostethus Fieber and Peribalus Mulsant et Rey (Heteroptera, Pentatomidae) of the Palaearctic Region, Entomological Review 87 (6), pp. 701-739 : 729

publication ID	https://doi.org/10.1134/s0013873807060085
DOI	https://doi.org/10.5281/zenodo.15003223
persistent identifier	https://treatment.plazi.org/id/821A87F6-FF9E-8B3D-FF02-E3CEFA72F9F0
treatment provided by	Luisschmitz
scientific name	Holcostethus
status

Treatment

Genus HOLCOSTETHUS Fieber, 1860 View in CoL

Holcostethus Fieber, 1860: 79 [type species: Cimex sphacelatus Fabricius, 1794 , by subsequent designation (Kirkaldy, 1909: 47)]; Ribes and Schmitz, 1992: 159–160.

Dryocoris Mulsant et Rey, 1866: 267 (nom. n. pro Holcostethus).

Diagnosis. Clypeus open. Head without sharp constriction before eyes. Aedeagus with 1 pair of conjunctive processes usually sclerotized at apices ( Holcostethus s. str.), with narrow sclerotized median plates. Theca with small processes at sides.

Composition. The genus includes four species subdivided into the two subgenera Holcostethus and Enigmocoris subgen. n. differing in the structure of the parameres and in the sclerotization of apices of the conjunctive processes.

A KEY TO SPECIES OF THE GENUS HOLCOSTETHUS FIEBER

1( 6). Jugae as long as clypeus ( Figs. 94, 95 View Figs ). Conjunc-tive processes of aedeagus sclerotized at apices. Parameres in form of overturn “L,” flat; hy-pophysis with tooth; uneven area of inner sur-face of paramere poorly developed ( Figs. 50– 52 View Figs ). Spermatheca with spherical bulb bearing long processes projecting beyond proximal flange ( Figs. 12, 13 View Figs ) ........ ( Holcostethus s. str.).

2( 5). Apex of pygofer with weak emargination ( Fig. 64 View Figs ). Apices of parameres widened only in dorsal part, if at all ( Fig. 51 View Figs ). Uneven area of inner surface of paramere poorly developed, finely granulate.

3( 4). Sides of pronotum straight, with sharp pale costa deflexed upwards. Body larger (length 8.0–10.2 mm), dark. Hypophysis of paramere narrowed in middle, apex with developed dorsal part, tooth situated closer to center ( Fig. 51 View Figs ). Spermathecal bulb small, with lateral appendages on processes ( Fig. 12 View Figs ). Laterotergite IX strongly widened at apex ( Fig. 100 View Figs ) ..................................................... ................ H. (H.) sphacelatus (Fabricius, 1794) .

4( 3). Sides of pronotum concave, with rounded pale costa not deflexed upwards. Body smaller (length 7–8.5 mm), pale. Hypophysis of paramere slightly narrowed in middle, not widened toward apex, with tooth at base ( Fig. 50 View Figs ). Spermatheca with larger bulb, without lateral appendages on processes, latter frequently bifurcate at apex ( Fig. 13 View Figs ). Laterotergite IX almost not widened at apex ( Fig. 101 View Figs ) ............................ ....................... H. (H.) albipes (Fabricius, 1781) .

5( 2). Apex of pygofer with deep and sharp emargination ( Fig. 65 View Figs ). Paramere symmetrically widened at apex, uneven area of inner surface of paramere more distinct, with coarser sculpture and large tooth at base ( Fig. 52 View Figs ) ................................. ................................. H. (H.) evae (Ribes, 1986) .

6 ( 1) Jugae slightly longer than clypeus ( Fig. 41 View Figs ). Conjunctive processes of aedeagus not sclerotized at apices ( Figs. 42, 43 View Figs ). Paramere large, smoothly curved; hypophysis wide, with tooth at apex; uneven area of inner surface of paramere well developed ( Fig. 53 View Figs ) ( Enigmocoris subgen. n.) ........ H. (E.) fissiceps Horváth, 1905 .