(2 ♂♂). Holotype: ♂, labeled ‘CHINA: Yunnan, Lincang Pref., / Xue Shan, 48 km N Lincang, / 2070 m, 24°19'03"N, 100°07'13"E, / forest remnant, N-slope, litter & / mushrooms sifted, 12.IX.2009, / leg. M. Schülke [CH09-45]’ (pcMS). Paratype: 1 ♂, same label data as holotype (SNUC).

Male (Fig. 1A). Length 3.52–3.70 mm. Head longer than wide, HL 0.81–0.84 mm, HW 0.68–0.69 mm; eyes each composed of about 50 facets; maxillary palpi as in Fig. 2B; antennae (Fig. 2A) with scapes roundly projecting basolaterally; terminal three antennomeres enlarged. Pronotum longer than wide, PL 0.71–0.73 mm, PW 0.64–0.65 mm, lateral margins nearly parallel, evenly narrowed apically at basal 2/3. Elytra wider than long, EL 0.97–0.99 mm, EW 1.43–1.48 mm. Mesotrochanters, metatrochanters and metafemora lacking spine or projection at ventral margins. Abdomen broad at base and narrowed apically, AL 1.03–1.14 mm, AW 1.38–1.40 mm. Tergite VIII as in Fig. 2C; sternite VIII as in Fig. 2D; sternite IX as in 2E. Aedeagus length 0.83 mm, with elongate median lobe asymmetric (Figs 2F, G).

Female. Unknown.

Megatyrus schuelkei is most similar to Megatyrus laqueus Hlaváč & Nomura from Vietnam in sharing similar body size and aedeagal structure. The two species can be clearly separated by the more elongate maxillary palpi, and the antennomeres VI–VIII are slightly more elongate in the new species. Megatyrus laqueus has shorter maxillary palpi and quadrate antennomeres VI–VIII. Megatyrus schuelkei can be separated from Megatyrus menglianensis by the more elongate pronotum, and different aedeagal structure.

Southwest China: Yunnan.

Individuals were collected from sifted leaf litter with mushrooms in a forest remnant.

The new species is named after Michael Schülke, collector of the type series.

(1 ♀). Holotype: ♀, labeled ‘CHINA: Yunnan [CH07-17] / Baoshan Pref., mountain range 25 km S / Tengchong, 1900 m, 24°48'28"N, 98°32'03"E, dev. primary decid. forest, / litter, fungi sifted, 2.V.2007, M. Schülke’ (pcMS).

Female (Fig. 1B). Length 3.71 mm. Head longer than wide, HL 0.79 mm, HW 0.65 mm; eyes each composed of about 35 facets; maxillary palpi as in Fig. 3B; antennae (Fig. 3A) with scapes simple; terminal three antennomeres enlarged. Pronotum slightly longer than wide, PL 0.74 mm, PW 0.71 mm, lateral margins nearly parallel, evenly narrowed apically at middle. Elytra wider than long, EL 0.93 mm, EW 1.43 mm. Legs simple. Abdomen broad at base and narrowed apically, AL 1.25 mm, AW 1.46 mm. Tergite VIII as in Fig. 3C–E; sternite VIII as in Fig. 3F. Genital complex weakly sclerotized, width 0.55 mm, with dorsal and ventral sclerites (Figs 3G).

Male. Unknown.

In general, Megatyrus males are morphologically similar to females, and possess indistinct second sexual characters. Proportions of head, pronotum and abdomen between male and female are close, except that females have much shorter elytra, as well illustrated in Nomura et al. (2011: 123). The single female of Megatyrus tengchongensis is very similar to that of Megatyrus menglianensis Hlaváč & Nomura by the tergite VIII possessing a large and thick median projection, but the two species can be separated by the maxillary palpomeres I being more elongate in Megatyrus tengchongensis, and the clearly different structure of the genital complex. From Megatyrus schuelkei described above, Megatyrus tengchongensis can be separated by the relatively much shorter and stouter pronotum.

Southwest China: Yunnan.

The adult was collected from sifted leaf litter in a deciduous forest.

The new species is named after the type locality, Tengchong County.