Dioedus liuhaoyii Jiang, Wang & Wang, 2020

Jiang, Ri-Xin, Wang, Ji-Shen & Wang, Shuo, 2020, Discovery of the genus Dioedus LeConte, 1862 from China, with description of a new species (Coleoptera: Tenebrionidae), Zootaxa 4860 (1), pp. 129-134 : 130-133

publication ID	https://doi.org/ 10.11646/zootaxa.4860.1.7
publication LSID	lsid:zoobank.org:pub:68E2C60E-DB80-41FF-8E7C-8FBAA56E8E1B
DOI	https://doi.org/10.5281/zenodo.4537425
persistent identifier	https://treatment.plazi.org/id/471987E1-FFEE-FFFB-FF49-817E7585F97E
treatment provided by	Plazi
scientific name	Dioedus liuhaoyii Jiang, Wang & Wang
status	sp. nov.

Treatment

Dioedus liuhaoyii Jiang, Wang & Wang sp. nov.

Figs 1–4 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4

Type material (8 specimens). Holotype: CHINA: ♂, labeled ‘ China: Henan Province, Nanyang City (NJṞm), Neixiang County (ÑÞe), Baotianman N. R. (±XḆHṳoeaeữ) , H: 1284m, 33.49°N, 111.93°E, 12.VII.2020, in rotten wood, Hao-Yi Liu leg.’ ( MHBU) GoogleMaps . Paratype: CHINA: 3 ♂♂, 4 ♀♀, same label data as the holotype ( MHBU) GoogleMaps .

Description. Male. Body small, oblong and subparallel-sided ( Fig. 1 View FIGURE 1 ), distinctly convex, brown to black, with legs and antennae brown, surface shiny.

Head ( Fig. 2A View FIGURE 2 ) strongly transverse, widest at eye level, ventrally without deep antennal grooves. Dorsal surface unevenly covered with large round punctures, which are much larger at disc of frons while much smaller at marginal area and denser behind eyes. Frons slightly depressed. Eyes small, about 1/3 as long as head (under natural conditions, head partly hidden in prothorax). Epistoma with straight margin. Labrum semicircular, surface shiny, covered with several long setae. Antenna ( Fig. 2C View FIGURE 2 ) short, with 11 antennomeres, club formed by two apical antennomeres; antennomere I enlarged and expanded; II and III about as long as wide, II wider than III; IV–IX transverse, near trapezoidal; X strongly expanded, transverse, XI near globular, apex rounded, X and XI covered with dense setae.

Pronotum ( Fig. 2B View FIGURE 2 ) near trapezoidal, wider than long, widest near base and distinctly wider than width of head. Disc convex. Dorsal surface smooth and covered with irregular large round punctures. Punctures smaller near anterior margin. Anterior margin and base of pronotum not beaded. Anterior margin slightly sinuated in middle, base slightly bisinuate, lateral margins slightly curved, slightly undulate near base, almost straight in basal 2/3 and slightly rounded in apical third. Anterior and posterior angles obtuse and rounded at apex.

Prohypomera covered with ruleless large round punctures and shallow creases. Prosternum covered with sparse large punctures, prosternal process with rounded apex, and slightly expanded at basal 3/5.

Elytra ( Fig. 3F View FIGURE 3 ) elongate, subparallel-sided, strongly convex, widest near apical 1/3. Dorsal surface smooth, with eight distinct striae constituted by a row of large round punctures, distance between punctures in each stria slightly larger than the diameter of punctures except stria V, in which distance between punctures is smaller than diameter of punctures. Area between striae with a row of much smaller punctures. Striae 7 and 8 not reaching elytral base.

Scutellar shield nearly triangular, lateral margins curved.

Pterothorax covered with punctures of different sizes, which are much smaller at disc and much larger at lateral areas. Metaventrite with a distinct short median sulcus, about as 1/4 length of metaventrite.

Abdodmen with five visible ventrites, ventrite 1-4 covered with punctures of different sizes which are smaller at middle and larger at lateral areas, punctures of ventrite 5 large and smaller at apex. Ventrite 1 about as long as ventrite 5, ventrite 2 longer than 3, ventrite 3 about as long as 4, ventrite 5 with rounded apex.

Legs short and strong, protibiae ( Fig. 3A View FIGURE 3 ) obviously expanded at apex, lateral margin with five obvious teeth. Meso- ( Fig. 3B View FIGURE 3 ) and metatibiae ( Fig. 3C View FIGURE 3 ) slightly expanded at apex, outer lateral margin of mesotibiae with five small teeth, metatibiae lacking teeth.

Aedeagus ( Figs 3 View FIGURE 3 D–E) short and tubiformed, nearly symmetrical, slightly curved with small and tubiformed median lobe.

Measurements (mm). BL 3.44–3.60; HL 0.33–0.35, HW 0.83–0.93; PL 0.98–1.05, PW 1.33–1.40; EL 2.13– 2.20, EW 1.40–1.50.

Female almost same as male in appearance.

Measurements (female, mm). BL 3.23–3.64; HL 0.30–0.38, HW 0.80–0.93; PL 0.90–1.08, PW 1.30–1.40; EL 2.03–2.18, EW 1.43–1.48.

Biological notes. All adults were collected in a rotten wood (broad-leaved tree), which was in the red-rotten stage of decay ( Fig. 4 View FIGURE 4 ).

Etymology. This species is named in honour of Mr. Hao-Yi Liu (Henan, China), who collected the type series of this new species.

Comparative diagnosis. The new species is similar to the only known Palaearctic species Dioedus miyakensis ( Nakane, 1963) from Japan by similar general characters, such as oblong body with shiny surface; head transverse and without deep antennal grooves at ventral side and pronotum widest near base. However, D. liuhaoyii sp. nov. can be differentiated from D. miyakensis by the following characters: 1) scutellar shield approximately as long as wide, nearly triangular (more rounded in D. miyakensis ; Ando 2015); 2) antennomere III approximately as long as wide (distinctly longer than wide in D. miyakensis ); 3) punctures on pronotum much smaller near lateral area than the disc, distance between punctures at disc area distinctly longer than half of the diameter of punctures, and shorter than half of the diameter of punctures at lateral area (almost same size in D. miyakensis ); 4) outer lateral margin of protibiae with five teeth (four in D. miyakensis ).