Adelostoma Duponchel, 1827

Purchart, Luboš, 2017, Revision of the genus Adelostoma (Coleoptera: Tenebrionidae). Part 2: A new subgenus and species from Oman, Zootaxa 4258 (3), pp. 281-286 : 282

Key to subgenera of the genus Adelostoma Duponchel, 1827

1 Epipleural carina complete, extending from apex of elytra up to humeral angle (sensu Koch 1952: 5, Fig. 2 ). Apical margin of buccal fissure lobes truncate............................................................................ 2

- Epipleural carina developed only apically, extending forwards from apex of elytra roughly to level of penultimate or third abdominal ventrite (sensu Koch 1952: 5, Fig. 4 ; 23, Fig. 94). Apical margin of buccal fissure lobe subtriangulate or subdentate................................................................................................... 3

2 Prothorax with foliaceous lateral portions, with antennal sulcus on hypomeron. Antennomeres closely fitted into one another, apical margin of the tenth antennomere angulate.................................... subg. Psaryphulum Koch, 1952

- Prothorax without distinctly foliaceous lateral portions, without antennal sulcus. All antennomeres distinctly pedunculate, apical part of the tenth antennomere straight-truncate........................... subg. Adelostoma s.str. Duponchel, 1872

3 Dorsal surface covered with long erect or semi-erect setae. Antennomeres IV-IX transverse or at most subquadrate. Anterior margin of pronotum slightly or moderately emarginated; sides roughly and irregularly denticulate; dorsal surface covered with net-like sculptures. Space between coarse and deep punctures on reflected portion of elytra smaller than their diameter................................................................ subg. Zarudnionymus Semenov & Bogatchev, 1947

- Dorsal surface glabrous without any setae. Antennomeres IV-IX distinctly longer than wide. Anterior margin of pronotum deeply emarginated; sides finely and more or less regularly denticulate; dorsal surface without net-like sculptures. Space between coarse and deep punctures on reflected portion of elytra much bigger than their diameter.................................................................................................. .. Omandelostoma subgen. nov.

Figures

FIGURES 1 – 5. Adelostoma muqalensis sp. nov., holotype. 1 — habitus, dorsal view; 2 — habitus lateral view; 3 — right antenna; 4 — head (white arrow indicates midlongitudinal carina on head); 5 — pronotum (white arrows indicate midlongitudinal carinae). Scale bars: Figs. 1, 2 = 2 mm; fig. 3 = 1 mm; figs. 4,5 = 0.5 mm.