Morimotanthribus leigongshani, Li & Trýzna & Guo, 2019

Li, Bo-Yan, Trýzna, Miloš & Guo, Jian-Jun, 2019, A new species of the genus Morimotanthribus Senoh & Trýzna (Coleoptera Anthribidae) from South China, Zootaxa 4701 (4), pp. 392-400 : 394-397

Morimotanthribus leigongshani sp. nov.

( Figs. 1–4 , 7–14 , 19–26 )

Type locality: China, Guizhou prov., Leigongshan , 26°22′27″N, 108°11′55″E, 1610 m .

Type material. Holotype (male): China, Guizhou prov., Kaili City (ḾƁm), Leishan County ( DƜH), Leigongshan ( DÖƜ), Leishan forest farm ( DƜ ḦṢ), 26°22′27″N, 108°11′55″E, 1610 m, 10.vii.2015, in rotten wood, Bo-Yan Li leg.; allotype (female): China, Guangxi prov., [Laibin City (ẊȐm)], Pingzhao, Jinxiu [= Jinxiu County ( ØĦH)], Mt. Dayaoshan [* KƜ], 1100 m, 5.-20.v.2015, local collector leg.; paratype (male): China, W Guizhou prov., Leigongshan, Xijiang, 29.v.-2.vi.1997, 1200-1900 m, Bolm lgt.

Red label [p]: ‘ HOLOTYPE / ALLOTYPE / PARATYPE / Morimotanthribus / leigongshani sp. nov. / B.-Y. Li, M. Trýzna & J.-J. Guo det., 2019’.

Holotype is deposited in the Institute of Entomology , Guizhou University, Guizhou, P. R. China ( GUGC), allotype and paratype in collection of Miloš Trýzna ( MTDC).

Description. Male holotype (female allotype). Measurements (in mm): BL—10.7 (8.00), AnL—6.35 (3.75), HL—2.95 (1.75), HW—1.90 (1.50), PL—2.25 (1.75), PW—2.55 (2.15), EL—5.50 (4.50), EW—3.25 (3.05).

Male holotype. Colouration of cuticle generally dark brown to blackish, predominantly covered with brown setae.

Head relatively small (HL 2.95 mm, HW 1.90 mm) with strips of whitish setae between eyes, on upper margin of eyes and with scattered whitish setae between antennal scrobes. Antennal scrobes reflexed and carinate in their dorsal parts ( Fig. 10 ).

Antennae relatively short (AnL 6.35 mm), individual antennomeres thick, covered with white setae on basal half of scape, on distal tips of antennomeres I–V, distal half of VI, whole VII–VIII, and with blackish setae on IX–XI ( Fig. 7 ).

Pronotum slightly transverse (PL 2.25 mm, PW 2.55 mm) ( Fig.1 ), widest in front of dorsal transverse carina, significantly narrower than elytra. Dorsal transverse carina separated from basal margin of pronotum, slightly convex and interrupted in middle. Lateral carina of pronotum well-developed, distinctly reaching anteriorly to threequarters of the pronotum length, widely rounded at contact with dorsal transverse carina.

Elytra oval (EL 5.50 mm, EW 3.25), parallel-sided in basal three–quarters, then narrowed posteriorly, basal margins straight, with a hump on humeral part ( Fig. 1 ). On elytra, two spots on humeral and two on preapical part (for description see also key). Scutellum with white setae.

Legs relatively short. All femora, tibiae and tarsi predominantly with dark brown setae, all tibiae with irregular stripe in middle.

Pygidium trapezoidal, concave on lateral parts, with central groove in proximal part ( Fig. 9 ).

Male genitalia. Segment 8 ( Figs. 22, 24 ) robust and wide, tergite 8 weakly sclerotized, sternite 8 forming from two weakly sclerotised sclerites (= sternal lobes). Sternite 9 (= spiculum gastrale) thin and short, arms longer than apodeme ( Figs. 23–24 ). Aedeagus robust, tectum wide with broadly rounded apex, pedon narrower with pointed tip. Apex of tegmen robust, wide, nearly rectangular, apex broadly rounded, densely covered with numerous long setae. Internal sac short ( Figs. 19–21 ).

Sexual dimorphism. Antennae extend slightly beyond base of elytra in both sexes, antennae somewhat longer in male ( Figs. 1–4 , 7, 11 ). Ventrite V as long as IV in male, 1.67 times longer in female. Pygidium flat in distal part in male, slightly convex in female ( Figs. 9, 13 ).

Variability. Size from 6.2 mm (paratype male) to 10.7 mm (holotype male). Elytral spots vary only slightly in shape, humeral spots always extend from elytral interval IV to IX. Spots light yellow to dark yellow with orange tinge.

Etymology. The new species is named after its type locality “Leigongshan National Nature Reserve” in Guizhou Province, China.

Collecting circumstances. The holotype specimen of the new species was collected in rotten wood heaps ( Fig. 25 ) in the afternoon. All three known specimens were collected between May 5 and July 10.

Distribution. South China: Guizhou and Guangxi provinces.

Differential diagnosis. Morimotanthribus leigongshani sp. nov. is similar to Morimotanthribus chinensis Senoh & Trýzna, 2006 from which it can be distinguished by the characters given in the following key:

(1) Male. Dorsal part of rostrum between reflexed and carinate antennal scrobes very deep, inner edges of scrobes forming conspicuously top-shaped pattern ( Figs. 5–6 , 18 ). Individual antennomeres III–VIII thick, corpulent and shorter, ratio of length to width: III–1.75, IV–1.67, V–1.5, VI–1.46, VII–1.5, VIII–1.5 ( Figs. 5–6 , 15 ). Basal margin of elytra weakly concave, apex of elytra very slightly elongate. Humeral spots larger, ramified, reaching from elytral interval II to IX, spot reaches forward to front margin of elytra in elytral interval IV, backwards shortly extended on elytral interval II, IV and VIII. Distribution: Hubei province, China ( Figs. 5–6 , 16 , 26 ).............................. Morimotanthribus chinensis Senoh & Trýzna, 2006

(2) Male. Dorsal part of rostrum between reflexed and carinate antennal scrobes shallower, inner edges of scrobes forming less distinctive top-shaped pattern ( Figs. 1–2 , 10 ). Individual antennomeres III–VIII slimmer and longer, ratio of length to width: III–2.50, IV–2.11, V–2.22, VI–2.00, VII–2.22, VIII–1.67 ( Figs. 1–2 , 7 ). Basal margin of elytra straight, apex of elytra widely rounded. Humeral spots smaller, compact, reaching from elytral interval IV to IX, spot not reaching forward to front margin of elytra, shortly extended backwards on elytral interval IV and VII. Distribution: Guizhou and Guangxi provinces, China ( Figs.

1–2, 8 , 26 )......................................................... .. Morimotanthribus leigongshani sp. nov.

Figures

FIGURE 25. Aerial and environment photographs of the type locality of Morimotanthribus leigongshani sp. nov.

FIGURE 26. Distribution of Morimotanthribus species in China.

FIGURES 1–2. Morimotanthribus leigongshani sp. nov., male holotype; 1, dorsal view; 2, dorso-lateral view. Scale bars in mm.

FIGURES 3–4. Morimotanthribus leigongshani sp. nov., female allotype; 3, dorsal view; 4, dorso-lateral view. Scale bars in mm.

FIGURES 7–18. 7–14, Morimotanthribus leigongshani sp. nov.; 7–10, male holotype; 11–14, female allotype; 15–18, Morimotanthribus chinensis Senoh & Trýzna, male paratype; 7, 11, 15, left antenna, dorsal view; 8, 12, 16, left humeral spot, lateral view; 9, 13, 17, pygidium, dorsal view; 10, 14, 18, head, dorsal view. Scale bars in mm.

FIGURES 19–24. Morimotanthribus leigongshani sp. nov., male holotype; 19–21, aedeagus; 22, segment 8; 23, sternite 9 (= spiculum gastrale); 24, segment 8 and sternite 9; 19, 22–24, ventral view; 20, dorsal view; 21, lateral view. Scale bars in mm.

FIGURES 5–6. Morimotanthribus chinensis Senoh & Trýzna, male paratype; 5, dorsal view; 6, dorso-lateral view. Scale bars in mm.