Mimela latimarginata Zhao, 2021

Zhao, Ming-Zhi, 2021, On the genus Mimela Kirby, 1823 (Coleoptera: Scarabaeidae: Rutelinae) from China and adjacent countries, with description of five new species, Zootaxa 4995 (2), pp. 201-230 : 215-218

Mimela latimarginata Zhao , new species

( Figs. 12A–C , 13M–O )

Type material. Holotype: ♂ ( MYNU), “ CHINA: Hainan Prov., Lingshui County, Mt. Diaoluoshan, Vocational Village , 18°43′30.99″N 109°52′05.30″E 932m, 2015.IV.16–18, Lu Qiu leg.” . Paratypes (9♂♂, 2♀♀): 2♂♂ ( ZMPC), same data as holotype ; 3♂♂ ( ZMPC), “ CHINA: Hainan Prov., Lingshui County, Mt. Diaoluoshan, Vocational village , 18°43′30.99″N 109°52′05.30″E 932m, 2015.IV.15, Lu Qiu leg.” ; 1♂ ( CCPC), “ CHINA: Hainan Mt. Wuzhishan 2009.IV.19 /24 Yu-Feng Hsu leg.” ; 1♂ ( CCPC), “ CHINA: Hainan Mt. Wuzhishan 900-1800m V.3- 4.2013 Yu-Feng Hsu leg.” ; 1♂ ( CCPC), “ CHINA: Hainan Baisha County, Yinggezui 780m 2011-IV-30 Yi-Ting Chung leg.” ; 1♂, 2♀♀ (1♂, 1♀ WFPC, 1♀ ZMPC), “ Hainan, Mount Wuzhi , 1200m, 12-14.IV.2019, Jian-Yue Qiu leg.” .

Description. Holotype (male). Body length 18.7 mm, greatest width 10.6 mm; body shape elongated ovoid, slightly broadened posteriad, moderately convex. Color. Body metallic dark green; antenna, anterior half of clypeus, mouth parts, lateral margin of pronotum, femora, tibiae, tarsal claws, ventral prothoracic surface, mesepimeron and metepisternum yellowish brown; tarsi blackish green; abdominal ventrites with reddish hue. Head: Clypeus about 1.75 times broader than long, trapezoidal, anterior angle rounded, anterior margin strongly reflexed; frontoclypeal suture distinct; clypeus and anteromedial portion of frons shallowly and densely rugopunctate, other portions of frons and vertex with sparse small punctures; antennal club almost equally as long as antennomeres 1–6 combined; with two semierect short setae along inner margin of eye. Pronotum. About 1.86 times broader than long; sides distinctly convergent anteriad in posterior two fifth, then strongly convergent to anterior angle, anterior half feebly concave; anterior and posterior angles blunt, anterior angle distinctly protruding; basal marginal line interrupted before scutellum, other marginal lines complete; with sparse small punctures; disc with a distinct longitudinal medial furrow; lateral portion with three depressions, the first ovoid and situated behind anterior angle, the second rounded and situated medially, the third elongated and oblique, situated near posterior angles. Scutellum. Semicircular, with rather sparse minute punctures. Elytra. Intervals almost flat, three inner intervals weakly convex apically; strial punctures large and close; primary costae almost smooth; interstices with scattered large punctures, becoming sparser apically; humeral umbo and apical protuberance distinct, smooth; lateral carina broad, appearing at shoulder, abruptly disappearing at posterior fifth of side. Propygidium. Glabrous, with sparse and shallow small punctures. Pygidium. With a distinct longitudinal medial groove not reaching the apex; each side of posterior margin with a distinct concavity; finely and sparsely punctate, punctures being denser laterally; with a transverse row of long setae along apical margin. Abdominal ventrites. With dense small punctures, which being denser laterally; each ventrite with a transverse row of sparse short setae. Ventral thoracic surface. Prosternal process well developed and plough-shaped, strongly pointed anteriad, posterior ventral corner blunt; mesometasternal process absent; metasternum densely punctate; meso- and metasternum with moderately dense long setae, broadly glabrous at middle of metasternum. Legs. Slender; protibia bidentate, terminal tooth extends to posterior level of protarsomere 3 and acute at apex, proximal tooth smaller and triangular; protarsomere 5 with a internomedial denticle; inner protarsal claw and outer mesotarsal claw deeply split apically with the former wider, forming two branches; upper branches shorter, both branches sharp at apices; inner metatarsal claw slightly more arched and shorter than the outer one; metatibia fusiform. Aedeagus. As in Fig. 13D, J, P .

Paratypes. Male. Body length: 18.2–18.4 mm, greatest width 10.3–10.4 mm. External features, color and genitalia consistent. Female. Body length: 19.3 mm, greatest width 11.3 mm. Generally similar to male but body stouter and more convex. Antennal club distinctly shorter than combined length of antennomeres 1–6. Pygidium more convex than in male, more triangular in shape. Terminal tooth of protibia blunt at apex, extends to half-length of protarsomere 3; proximal tooth of protibia blunt; protarsus neither thickened nor abbreviated; internomedial denticle of protarsomere 5 less prominent.

Differential diagnosis. Mimela latimarginata Zhao , new species is closely allied to M. opalina Ohaus, 1902 ( Figs. 12D–F , 13P–R ) from South China and North Vietnam, but differs considerably from it by the following characters: dorsal surface and pygidium strongly metallic (non-metallic and strongly lacquered in M. opalina ), ventral meso- and metathoracic surface metallic green (yellowish brown with greenish faint in M. opalina ), distinctly wider lateral carinae on elytra, and strongly modified protibia of male. The parameres of M. opalina are strongly curved inward at the lower margin, with a thinner proximal part.

Distribution. China: Hainan (Mt. Diaoluoshan, Mt. Wuzhishan, Mt. Yinggeling).

Etymology. The specific epithet is formed by the Latin adjectives “ latus, -a, um ” and “ maginatus, -a, -um ”. It is an allusion to the distinctly broadened lateral carinae of elytra.

Figures

FIGURE 12. Habitus of Mimela spp. A–C, M. latimarginata Zhao, new species. A–B, holotype; C, female paratype; D–F, M. opalina Ohaus, 1902 (Guangxi, Jinxiu, Mt. Dayaoshan); A, C–D, F, dorsal view; B, E, ventral view.

FIGURE 13. Male genitalia of Mimela spp. from China. A–C, M. admixta Zhao, new species, holotype; D–F, M. hauseri Ohaus, 1943 (Biaoshuiyan); G–I, M. hauseri (Mt. Maoershan); J–L, M. hauseri (Mt. Dayaoshan); M–O, M. latimarginata Zhao, new species, holotype; P–R, M. opalina Ohaus, 1902 (Guangxi, Jinxiu, Mt. Dayaoshan); S–U, M. foveola Benderitter, 1929 (Biaoshuiyan); V–X, M. foveola, syntype (Chapa; images ©Matthias Seidel); first row, dorsal view; second row, right lateral view; bottom row, ventral view.