Miridiba ( Miridiba ) kuatunensis Gao & Fang, 2018

Miridiba ( Miridiba) kuatunensis Gao & Fang View in CoL , new species

( Figs. 2 View FIGURE 2 , 6 View FIGURE 6 )

Type locality. CHINA: Fujian Province: Wuyishan Mountain .

Type material examined. Holotype, male, labelled: “Guadun, Chong’an, Fujian / Chinese Academy of Sciences [handwritten or typeset, Chinese] // 1963. VII.10 / Collector Youwei Zhang [handwritten, Chinese] // Holotrichia pilosella Moser / Identified by Youwei Zhang 196I. VI [handwritten, Chinese] // IOZ (E)1967841 [typeset] // HOLOTYPE ♂ / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang det. 2018 [typeset, red label]”, deposited in IZCAS; paratype, female: “Hujiang village, Fengyang Town, Lianxian County, Guangdong / Chinese Academy of Sciences [handwritten, Chinese] // 1965. 6. 17 / Chinese Academy of Sciences [typeset, Chinese] // Host: Vernicia fordii [ Euphorbiaceae , handwritten, Chinese] // PARATYPE ♀ / Miridiba kuatunensis sp. nov. ♀ Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratype, male: “Jiuniutang, Maoershan, Guangxi / Chinese Academy of Sciences [handwritten or typeset, Chinese] /1985. VII. 10 [handwritten] // IOZ (E) 2016208 [typeset] // PARATYPE ♂ / Miridiba kuatunensis sp. nov. ♂ / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratype, male: “Ningde, Fujian / 80. 5. 29 [handwritten] // Fujian Forestry Department / Melolonthidae / 0 0 8 [handwritten or typeset, Chinese] // H. ( P.) pilosella Moser [handwritten] // PARATYPE ♂ / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratype, female; “Miaoxiao, Fujian / 81-6-20 [handwritten] // Fujian Forestry Department / Melolonthidae / 0 0 8 // H. ( P.) pilosella Moser [handwritten or typeset, Chinese] // PARATYPE ♀ / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label], deposited in IZCAS; paratype, male: “Beijing Museum of Natural History [typeset, Chinese] / Yanshan, Guangxi / Sikong Liu 1963. V. 28 [handwritten, Chinese] // Holotrichia pilosella Moser / Identified by Youwei Zhang 1988. VII. 11 [handwritten, Chinese] // PARATYPE ♂ / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratype, female: “Beijing Museum of Natural History [typeset, Chinese] / Qinglan, Hainan Island / Sikong Liu, 1965. II. 8 [handwritten, Chinese] // PARATYPE ♀ / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratype, male: “ 14 V. 33 S [handwritten] // FUKEIN / Jianou / Musée Heude [typeset] // PARATYPE ♂ / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratype, male: “3247 / Songyang County, Zhejiang [handwritten, Chinese] // Holotrichia pilosella Moser 1991 . XI. 13 / Identified by Zhiliang Zhang [handwritten, Chinese] // SYAU (E) 0 0 8 / Jin 3. 28 [handwritten, Chinese] // PARATYPE ♂ / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in SYAU; paratype, male: “Fujian / Zhang Zhiliang / 1998.7 [handwritten, Chinese] // PARATYPE ♂ / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in SYAU; paratype, male: “Jiuniutang, Maoershan, Guangxi / Chinese Academy of Sciences [Chinese] // 1985. VII.9 / Collector Subai Liao [Chinese] // PARATYPE ♂ / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratype, female: “Chongan, Fujian [Chinese] / 80-6-9 / Collected by team 3 [Chinese] // Fujian Forestry Department / Melolonthidae / 0 0 8 [handwritten or typeset, Chinese] // H. ( P.) pilosella Moser [handwritten] // PARATYPE ♀ / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratype, female: “Jianyang, Aotou, Fujian [Chinese] / Chinese Academy of Sciences [Chinese] / 63. VI. 30 / Collector Youwei Zhang [handwritten] // Holotrichia pilosella Moser ♀ / Identified by Youwei Zhang [handwritten] // PARATYPE / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratype, female: “Xingcun Sangang, Chongan, Fujian / 740 m, Light / Chinese Academy of Sciences [handwritten or typeset, Chinese] // 1960. VI. 28 / Collector Yong Zuo [handwritten, Chinese] // PARATYPE / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratypes, 4 males and 6 females: “Dazhu, Yue / 900 – 1170 m / Chinese Academy of Sciences [handwritten or typeset, Chinese] // 28. V. 1960 / Jianhao Zhang [handwritten, Chinese] // PARATYPE / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratype, female; “Fengyang, Hujiang / Lianxian, Guangdong / Chinese Academy of Sciences [Chinese] // 1965. V. 18 / Collector Youwei Zhang // Host Pyrus betulifoli a [ Rosaceae , handwritten, Chinese] // PARATYPE / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS; paratype, female: “Beijing Museum of Natural History / Yanshan, Guangxi / Sikong Liu 1964.?. 7 [typeset or handwritten, Chinese] // PARATYPE / Miridiba kuatunensis sp. nov. / Chuanbu Gao & Hong Fang / det. 2018 [typeset, yellow label]”, deposited in IZCAS.

Description of holotype (male). Body length 17.3 mm, width across humeri 7.6 mm, body oval-elongate, strongly convex, dorsal surface densely setiferous, setae short.

Colour: Head, pronotum, scutellum and legs dark reddish brown; antennae, elytra and abdomen brown to dark brown ( Figs. 2a, b View FIGURE 2 ).

Head: Frons densely punctate and setiferous; clypeus with anterior margin distinctly bilobed and reflexed; fronto-clypeal suture wave-shaped; frontal carina distinctly raised, weakly curved backwards; clypeus shorter than frons, length ratio between clypeus and frons before carina 0.56; distance between eyes three times wider than eye ( Fig. 2c View FIGURE 2 ). Antenna with 9 antennomeres; club slightly longer than antennomeres 2–6 combined, length ratio 1.18 ( Fig. 2c View FIGURE 2 ).

Thorax: Dorsal surface of pronotum densely punctate and setiferous (Fig. 11); pronotum widest at middle; anterior margin flanged, lateral sides serrated; lateral margin serrated and moderately reflexed; posterior margin smooth; anterolateral angles 90°, posterior angles obtuse ( Fig. 2d View FIGURE 2 ); prosternal process tongue-shaped. Scutellum triangular ( Fig. 2e View FIGURE 2 ), 1.4 times wider than long, dorsal surface covered with dense short setae. Dorsal surface of elytra covered with dense short setae, epipleuron with lots of cilia ( Figs. 2a, b View FIGURE 2 ).

Legs: Protibia tridentate; denticle 2 and 3 sharp; dorsal carina forking to denticle 2 and 3; apical spur reaching basal one-fourth of protarsomere 1. Metafemora densely pubescent ( Fig. 2f View FIGURE 2 ); distal 2/5 of outer side of metatibia with 1 transverse completed carina ( Fig. 2g View FIGURE 2 ); dorsolateral margin with 1 thorn; dorsomedial margin with five thorns small to large; metatibia with two apical spurs of different sizes, spurs lanceolate shaped ( Fig. 2g View FIGURE 2 ); metatarsomere 1 equal in length with metatarsomere 2.

Abdomen: Abdominal sternites densely covered with short setae.

Pygidium: Fan-shaped pygidium densely punctate and setiferous, setae short; 1.44 times wider than long, apical pygidium at a right angle.

Male genitalia. Phallobase: Phallobase 1.41 times longer than paramere; dorsal surface with a depressed longitudinal sulcus at middle; anterior 1/5 of phallobase constricted. Parameres: Dorsal surface of parameres with two ladder-shaped plates at basal 2/5 and two pairs of branches at apex; dorsal branches 1.5 times longer than ventral branches. Dorsal branches thick, extended forwards and curved inwards subapically, then divergent at apex; ventral branches slender, tips curved outwards and downwards ( Figs. 2h, i View FIGURE 2 ). Endophallus: Dorsal endophallus with temones tapered; medial endophallus with some small hook-shaped spurs and densely punctate sensillae ( Fig. 2j View FIGURE 2 ).

Female. Antenna with 9 antennomeres, club with 3 antennomeres; club equal in length to antennomeres 2–6 combined. Anterior metatibia slightly broader than in male.

Variability. The known paratypes slightly differ in size (total body length: 17.3–18.5 mm, width across humeri 7.6–8.5 mm).

Diagnosis. Miridiba ( M.) kuatunensis new species is distinguished from M. ( M.) pilosella (Moser, 1908) by the ratio between the dorsal branches and ventral branches of the parameres ( 1.25 in M. ( M.) pilosella ; 1.5 in M. ( M.) kuatunensis new species), and the curving of the dorsal branches of the parameres (the tips of the dorsal branches bent downwards, the angle of the bend is 55° in M. ( M.) pilosella ; the apex of dorsal branches only curved downwards (30°) and moderately expanded in M. ( M.) kuatunensis new species).

Distribution. China ( Fujian: Jianou, Nanping, Ningde; Guangdong: Guangzhou, Qingyuan; Guangxi: Guilin; Hainan: Wenchang; Zhejiang: Lishui) ( Fig. 6 View FIGURE 6 ).

Etymology. From the type locality, Guadun (= Kuatun) in Wuyishan of Fujian province.

Chinese name. 挂脊鳃金龟 Remarks. According to the information on the specimen collection labels, adults of M. ( M.) kuatunensis new species feed on Vernicia fordii (Euphorbiaceae) and Pyrus betulaefolia (Rosaceae) .