Xylocoris (Arrostelus), Kirkaldy, 1906

Yamada, Kazutaka, Yasunaga, Tomohide, Artchawakom, Taksin & Sers, 2013, The genus Xylocoris found from plant debris in Thailand, with description of a new species of the subgenus Arrostelus (Hemiptera: Heteroptera: Anthocoridae), Acta Entomologica Musei Nationalis Pragae 53 (2), pp. 493-504 : 495

Subgenus Arrostelus Kirkaldy, 1906

Diagnosis. Subgenus Arrostelus can be distinguished from other subgenera by a combination of the following characters: male tibial teeth always absent ( Figs 16 , 20 ); supracoxal area of metapleuron distinct and smooth ( Figs 13, 15 ); copulatory site and cicatrices after copulation present on anterodorsal area of abdomen ( CARAYON 1972a,b); and ectospermalege always absent.

Remarks. Four species, X. flavipes , X. congoensis (Bergroth, 1905) , X. hirsutus Carayon, 1961 , and X. queenslandicus Gross, 1954 are now assigned to the subgenus Arrostelus ( CARAYON 1972b, CASSIS & GROSS 1995). CARAYON (1972b) suggested that X. vicarius (Reuter, 1884) from western Nearctic and Colombia may be accommodated in a new subgenus, closely related to Arrostelus . At present, X. vicarius is tentatively placed in the subgenus Xylocoris ( HENRY 1988, CARPINTERO 2002). Xylocoris ampoli sp. nov. described below is the second member of Arrostelus discovered from the Oriental Region.

Figures

Figs 13–16. SEM images of Xylocoris (Arrostelus) ampoli Yamada & Yasunaga sp. nov., male (16) and female (13–15). 13 – ostiolar peritreme and evaporatorium, left lateroventral view; 14 – ostiolar peritreme, left lateroventral view; 15 – supracoxal area, left lateroventral view; 16 – protibia, ventral view. Scale bars: 0.05 mm.

Figs 17–22. Xylocoris (Arrostelus) ampoli Yamada & Yasunaga sp.nov., male (17, 19–22) and female (18). 17 – head and pronotum, macropterous form, dorsal view; 18 – hemelytron, macropterous form, dorsal view; 19 – ditto, brachypterous form, dorsal view: 20 – right fore leg, outer view; 21 – right middle leg, outer view; 22 – right hind leg, outer view. Scale bars: 0.5 mm for 18, 19; 0.3 mm for 17; 0.2 mm for 20–22.