A review of the genus Miridiba Reitter (Coleoptera: Scarabaeidae: Melolonthinae) of Taiwan Author Li, Chun-Lin Author Yang, Ping-Shih Author Wang, Chuan-Chan text Zootaxa 2015 3955 4 521 536 journal article 10.11646/zootaxa.3955.4.4 6bfc02a5-f0b4-463f-a73b-2acd495dc130 1175-5326 245379 ED02F77E-42CA-41EC-89F3-AF5B8F36178F Miridiba ( Pledina ) sinensis ( Hope, 1842 ) Figs. 6 , 12 , 18, 24, 39, 40 Holotrichia sinensis Hope, 1842 : 60 ( Type locality: Chusan (presently Zhoushan, Zhejiang Prov.), China . Type not examined); Hope 1845 : 8 (redescription, type locality stated); Smetana & Král 2006 : 219 (catalog). Ancylonycha sinae Blanchard, 1851 : 139 . Synonymized by Burmeister (1855: 316) . Rhizotrogus cribellatus Fairmaire, 1891 : 200 . Synonymized by Keith (2006: 43) . Specimens examined. TAIWAN . New Taipei City (formerly Taipei County): Sheng Ken, 16/VI/1982 , C.-L. Li ( 1 male , CCLI); Lin Kou, 21/V/1993 , C.-C. Chen ( 1 male , CCLI); Ba Li, 23/VI/1993 , I.-S. Hsu ( 3 males , CCLI); Kwan In Shan, 2/VI/1993 , I.-S. Hsu ( 2 males and 1 female , CCLI). Taoyuan County: Da Wan, N. Crossing Hwy, 23/V/2003 , C.-L. Li ( 1 male , CCLI); Yangmei, May 23, 1972 , B-S. Chang. Nantou County: Lienhuachih, V/2–VI/ 12/2001 , C.-S. Lin & W.-T. Yang, Malaise trap (KCN) ( 2 males , NMNS); same locality, VI/10–VII/12/2004 , C.-S. Lin & W.-T. Yang, Malaise trap (KCN) ( 2 males , NMNS); same locality, VI/10–VII/7/2003 , C.-S. Lin & W.-T. Yang, Malaise trap (KCN) ( 1 male , NMNS); same locality, VII/7–VIII/14/2003 ,, C.-S. Lin & W.-T. Yang, Malaise trap (KCN) ( 1 male , NMNS); same locality, V/5/2004 , S.-M. Chan, Sweeping Net ( 1 male , NMNS); Taichung County: Tatu Juiching Village, No.1 Sampling Plots, IV/27–VII/20/2007 , C.-S. Lin & W.-T. Yang, Malaise trap (KCN) ( 1 male , 1 female , NMNS); Kaoshiung County: Maolin, 12/V/1991 , C.-K. Yu ( 1 male , 1 female , CCLI). Pingtung County: Kentine, K. Botan . Garden, 22–25/V/1989 , C.-S. Lin, Light Trap ( 2 males , NMNS); Manchou Nanjensahn, IV/29–V/17/2009 , M.-L. Jeng & T.-R. Chen, Flight Intercept Trap ( 1 male , NMNS). CHINA . Anhui Prov., Hwangshan city, Tanko township, Fuxi, 118.08E , 30.04N , alt. ca. 540 m , by light, 10/July/2014 , Collr. J.-Y. Qiu ( 1 male , CCLI); Jiangxu Prov., Zhongshan Tomb, Zijing Shan, Nanjing city, 118.50E , 32.03N , alt. ca. 113 m , by light, 6/July/2014 , Collr. J.-Y. Qiu ( 1 male , 2 females , CCLI); Hainan Prov. Wuzinshan Nature Reserve HQ, 109.40E , 18.54N , alt. ca 751 m , by light, 18/May/2014 , Collr. J.-Y. Qiu ( 1 female , CCLI). FIGURE 43. Distribution map of Miridiba species in Taiwan: Miridiba kuraruana (open circle), Miridiba formosana (open triangle), Miridiba taipei (black diamond), Miridiba sinensis (open square), and Miridiba huesiotoi and Miridiba taoi indicated by arrow, respectively. Redescription. Male ( Fig. 6 ). Body length 19.5–23.0 mm; width across humeri 9.3–11.2 mm . Color dark reddish brown to nearly piceous on head, pronotum, scutellum, venter, and legs; reddish brown to dark rufotestaceous on elytra; weakly shiny. Antennae yellowish brown to dark reddish brown. Body thick with dorsum completely glabrous ( Figs. 6 , 12 , 18). Head: Surface densely punctate, punctures large. Clypeus ( Fig. 7 ) with apex distinctly bilobed and reflexed; lobes obtuse, widened at base. Clypeofrontal suture clearly defined. Basal carina straight, distinctly raised. Antenna with 10 antennomeres, club subequal to length of antennomeres 3–7 combined. Thorax: Pronotum widest at middle; anterolateral angles moderately protuberant ( Fig. 12 ) basolateral angles obtuse, lateral margin weakly serrate to smooth on anterior fifth, moderately reflexed; lateral declivities with distinct gibbosity behind middle; anterior margin completely beaded, basal margin smooth; setiferous punctures deep, large, and evenly distributed. Scutellum triangular, flat; punctures identical to those on pronotum. Prosternal process trapezoidal, slightly raised apically. Elytra: Discal surface densely rugopunctate; sutural costa weakly developed to vestigial. Abdomen : Pygidium wider than long, propygidium and pygidium glabrous. Sternites 1, 2, and 6 with surface densely punctate, sternites 3–5 with moderately distributed, deep punctures; sternites 3–6 almost glabrous with only a row of setae on anterior margin; setae on sternites 3–4 short, on sternites 5–6 intermixed with longer setae. Legs : Protibia tridentate. Profemora and mesofemora moderately covered with long setae, metafemora ( Fig. 24 ) with only a row of robust setae along posterior margin; metafemora moderately broadened anteriorly and posteriorly, weakly convex. Metatibia upper apical spur reaching basal one-fourth of second tarsomere. Genitalia : Parameres asymmetrical, prolonged anteriorly and curved at middle when viewed laterally ( Fig. 39 ); both parameres with an inner leaf-like expansion interlocked at middle in dorsal view ( Fig. 40 ). Female. Body length 20.1–23.6 mm ; width across humeri 9.2–10.8 mm . Antennal club shorter than in male, subequal to length of antennomeres 4–7 combined. Diagnosis. See diagnosis of M. kuraruana for comparison of species. Distribution. Taiwan . Northern to southern China : Shangdong, Anhui, Jiangxi, Zhejian, Jiangxu, Fujian, Guangdong, Hainan. Chinese name. 中華脊頭鰓金龜 Remarks. We have examined several specimens of Miridiba sinensis collected from various places of China and confirmed that the same species occurs in Taiwan . Miridiba sinensis is common in Taiwan and can be found from coast to lower montane areas under 700 m in elevation throughout the western and northwestern part of Taiwan ( Fig. 43 ). Adults of M. sinensis are sympatric with M. formosana and M. kuraruana with an identical temporal distribution from late spring to summer.