Dryadocoris, Kirkaldy, 1909

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 : 736-737

Genus DRYADOCORIS Kirkaldy, 1909

Dryadocoris Kirkaldy, 1909: 47 [nom. n. pro Holcostethus (non Fieber, 1860): Stål, 1872, type species: Pentatoma analis Costa, 1847 (= Cimex apicalis Herrich-Schaeffer, 1842 ), by original designation].

Dryadocoris : Tamanini, 1981; Linnavuori, 1982; Ribes et Schmitz, 1992.

Fieber (1861) described the genus Holcostethus , in which, in addition to H. sphacelatus and H. albipes , he also included H. jani (= H. analis ). Kirkaldy (1909) established the genus Dryadocoris specially for P. analis . Analysis of the external and genital characters has substantiated the generic status of Dryadocoris . The characteristic structure of the male ( Figs. 110– 117 ) and female ( Figs. 118, 119 ) genitalia is observed in the species from the Mediterranean basin (Morocco), southwestern Asia (Yemen), and Equatorial Africa (near lakes Victoria and Nyasa). Here only the type species of the genus is considered.

Diagnosis. Representatives of the genus Dryadocoris differ from species of the considered generic complex in the absence of a carina on the lateral margin of the pronotum, presence of pits at sides of the base of the scutellum ( Fig. 108 ), in the large flattened paramere bearing dentiform attenuate sensory lobe, the aedeagus bearing an unpaired number of very short conjunctive processes ( 3), the clavate sclerotized median plates, and also in the distinctive shape of the spermathecal bulb ( Fig. 119 ).

Description. Jugae strongly emarginate before eyes, as long as clypeus. Eye large ( Fig. 109 ). Pronotum with straight or slightly curved sides with sharp margins, without carina or costa. Punctation sparse. Scutellum with pale or dark spot at apex. Odoriferous glands with long narrow groove.

Male genitalia. Aedeagus with 3 (2 paired and 1 unpaired) conjunctive processes, curved vesica, and clavate sclerotized median plates. Paramere flat, large, with distinctly separate sensory lobe. Pygofer with deep emargination also forming small median emargination; apices widely rounded ( Fig. 83 ). Theca oval, without processes.

Female genitalia. Spermathecal bulb spherically widened at base, elongate toward apex, with long slen-der processes; sclerotized duct not widened at base ( Fig. 119 ). Genital plates: laterotergites IX strongly widened toward apex; sternite IX very short, wide, with attenuate narrow apices and weakly concave distal margin ( Fig. 118 ).

Figures

Figs. 106–112. (106, 107) Genital segments of female: (106) Peribalus classeyi Hob.; (107) Paraholcostethus breviceps (Horv.); (108, 109) Dryadocoris apicalis (H.-Sch.) [(108) scutellum; (109) head]; (110–112) Dryadocoris Kirkaldy, parameres [(110) D. apicalis (H.-Sch.), (111) D. “orientalis,” (112) Dryadocoris sp.].

Figs. 113–119. Dryadocoris Kirkaldy: (113–117) aedeagus [(113, 114) D. apicalis (H.-Sch.), (115, 116) D. “orientalis,” (117) Dryadocoris sp.]; (118, 119) Dryadocoris sp., female genitalia [(118) genital plates, (119) spermatheca].

Figs. 74–83. Pygofer: (74–80, 82) Peribalus Mulsant et Rey [(74) P. strictus vernalis (Wolff), (75) P. strictus strictus (F.), (76) P. strictus capitatus (Jak.), (77) P. nitidus (Kir.), (78) P. inclusus (Dohrn), (79) P. congenitus Putsh., (80) P. hoberlandti Lodos et Önder, (82) P. manifestus Kir.]; (81) Himalayacoris pilosus sp. n.; (83) Dryadocoris sp. (“orientalis” on label).