Oiceoptoma Leach 1815
Creators: name: Sommer, David
name: Růžička, Jan
name: Nishikawa, Masaaki
name: Schneider, Jan
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Silphidae
Oiceoptoma

description: Modified key to Palaearctic Oiceoptoma (modified from Růžička et al. 2004)
The following couplets are modified to accommodate the newly described species.
5. Pronotum with diffuse median spots (usually composed of several scattered darker spots or almost indistinct, Figs. 4B, E). Scutellum more distinctly punctured medially than laterally (Fig. 6B). Elytra brown to black, subapical surface with rugosities (Figs. 2A, D, 9C). Male genital segment with ventrite 9 anteriorly distinctly longer than tergum 9 in ventral view (Fig. 12E).— Proventrite with dense punctation laterally; medially dark brown to black, laterally only narrowly orange in ventral view (Fig. 5B). Median lobe of aedeagus subapically distinctly sinuous laterally, tapering to a widely rounded apex (Figs. 11C–D). Basal portion oval, robust, not exceeding the width of aedeagus (Figs. 11C–D). Female tergum 7 posteriorly with wide, only weakly expressed emargination (Fig. 16A). Female tergum 8 truncate posteriorly (Fig. 13C). (Central and north-eastern China, Far East of Russia, Korean Peninsula to Japan)..................................................... O. subrufum (Lewis)
– Pronotum with four black distinct spots, arranged in a trapezoidal pattern (Figs. 4A, C). Scutellum with homogeneous punctation (Figs. 6A, C). Elytra subapically with simple surface (Figs. 1A, D, 2E, 3A, 9A–B, D). Male genital segment with ventrite 9 anteriorly as long as tergum 9 in ventral view (Figs. 12D, F).................................................. 6
6. Spots on pronotum distinctly delimited, smooth and glossy, only with sparsely distributed, minute punctures with very short setae (Figs. 4C, F). Proventrite with only minute, superficial punctation laterally; completely dark brown to black in ventral view (Fig. 5C). Elytra black (Figs. 2E, 3A, 6F, 9D). Apex of elytron short and rounded in female (Figs. 2E). Surface of scutellum and elytra with very weak, superficial punctation (Figs. 6C, F, 9D). Median lobe of aedeagus gradually tapered to a slender, sharp apex (Fig. 11E). Basal portion oval, less robust, not exceeding the width of aedeagus (Fig. 11E). Female tergum 7 posteriorly simple, without emargination (Fig. 16C). Female tergum 8 broadly truncate posteriorly (Fig. 14A). Female ventrites 5 and 6 longer medially, posteriorly exposing only a shorter area of brick-wall pattern (Figs. 14B, 15E). (Japan)............................................................................................... O. nigropunctatum (Lewis)
– Spots on pronotum vaguely delimited, regularly covered with fine, distinct punctures, covered by long, orange setation (Figs. 4A, D). Proventrite with dense punctation laterally; medially dark brown to black, laterally widely orange in ventral view (Fig. 5A). Elytra light to dark brown (Figs. 1A, D, 6D, 9A–B). Apex of elytron elongated to blunt tip in female (Figs. 1D, 8A, 9B). Surface of scutellum and elytra with distinct, deep punctation (Figs. 6A, D, 9A–B), Median lobe of aedeagus gradually tapered to widely rounded, triangular apex (Figs. 11A–B). Basal portion widely oval, very narrow, markedly exceeding the width of aedeagus (Figs. 11A–B). Female tergum 7 posteriorly with narrow, deep emargination (Fig. 17A). Female tergum 8 regularly rounded posteriorly (Figs. 13A, 17A). Female ventrites 5 and 6 very short medially, posteriorly with long area of brick-wall pattern (Figs. 15A–B, F) (China: Zhejiang Province). .... O. tangi Sommer, Růžička, Nishikawa & Schneider, new species
description: Published as part of Sommer, David, Růžička, Jan, Nishikawa, Masaaki & Schneider, Jan, 2021, Oiceoptoma tangi (Coleoptera: Silphidae: Silphinae), a new species of carrion beetle from eastern China, pp. 445-472 in Zootaxa 4949 (3) on pages 470-471, DOI: 10.11646/zootaxa.4949.3.2, http://zenodo.org/record/4640397