Megistophylla octobracchia Gao & Li, new species (Coleoptera: Scarabaeidae: Melolonthinae) from Yunnan, China, and redescription of M. grandicornis (Fairmaire, 1891) Author Gao, Chuan-Bu Author Li, Chun-Lin Author Fang, Hong text Zootaxa 2019 2019-03-12 4565 4 515 522 journal article 28375 10.11646/zootaxa.4565.4.5 365007a3-10a0-4a7e-a27a-eac37c849690 1175-5326 2591335 6FCA0D13-6302-42B9-A21A-98EFF9F641DA Megistophylla grandicornis ( Fairmaire, 1891 ) ( Figs. 3, 4 , 12–18 , 26–32 , 38–42 ) Hecatomnus grandicornis Fairmaire, 1891 : 202 ; Zhang & Li 1997 : 772 . Megistophylla grandicornis : Arrow 1944 : 634 . Type locality. “Kiu-Kiang” [= China : Jiangxi Province : Jiujiang City ] . Type material examined. None. Additional material examined. Male, labeled: “ Chongqing Fengjie / Peng Yang [Collector] / 2011. 5. 11 [typeset, Chinese] // Co-21-9759 / SWU [typeset] // Megistophylla grandicornis / ( Fairmaire, 1891 ) / det. GCHB 2018 [handwritten or typeset]”, deposited in SWU; male: “Yunana Kunming / Fengbo [Collector] / 2009. 0 5. 30 // Co-21-9063 / SWU // Megistophylla grandicornis / ( Fairmaire, 1891 ) / det. GCHB 2018 [handwritten or typeset]”, deposited in SWU; male: “Kunming Wenquan [Town] / 1980.?. 15 [handwritten] // Hecatomnus / grandicornis Fairm / Gu [19]90. 9. 14 [handwritten] // Megistophylla grandicornis / ( Fairmaire, 1891 ) / det. GCHB 2018 [handwritten or typeset]”, deposited in SYAU; male: “Gu 43 / Meitan [handwritten, Chinese] // 0 0 6 / Shennong [handwritten, Chinese] // Hecatomnus / grandicornis Fairm / Gu [19]90. 9. 14 [handwritten] // Megistophylla grandicornis / ( Fairmaire, 1891 ) / det. GCHB 2018 [handwritten or typeset]”, deposited in SYAU; male: “ Guizhou [handwritten, Chinese] // 0 16 [handwritten] // Hecatomnus / grandicornis Fairm / Gu [19]90. 9. 14 [handwritten] // Megistophylla grandicornis / ( Fairmaire, 1891 ) / det. GCHB 2018 [handwritten or typeset]”, deposited in SYAU; male: “ Fujian Liancheng Taipingliao / 1989. 6. 21 / Collector Jizu Zhang [handwritten, Chinese] // 56 [handwritten] // Hecatomnus / grandicornis Fairm / Gu [19]90. 9. 14 [handwritten] // Megistophylla grandicornis / ( Fairmaire, 1891 ) / det. GCHB 2018 [handwritten or typeset]”, deposited in SYAU; male: “3895 / Zhejiang Songyang [handwritten, Chinese] // Hecatomnus / grandicornis / Fairmaire 1991.?. 13 / Collector Zhiliang Zhang [handwritten, Chinese] // Megistophylla grandicornis / ( Fairmaire, 1891 ) / det. GCHB 2018 [handwritten or typeset]”, deposited in SYAU; male: “Kunming Wenquan [Town] / 1980.?. 21 [handwritten] // Hecatomnus / grandicornis Fairm / Gu [19]90. 9. 14 [handwritten] // grandicornis / ( Fairmaire, 1891 ) / det. GCHB 2018 [handwritten or typeset]”, deposited in SYAU. Redescription (males) ( Figs. 3, 4 , 12–18 , 26–32 , 38–42 ). Body length 17.3–22.6 mm ; width across humeri 8.1–10.1 mm ; body oval-elongate, dorsal surface glabrous and punctate, shiny ( Figs. 3, 4 ). Colour : Head, antennae, pronotum and scutellum reddish brown; elytra and legs brown to dark brown. Head : Antennae with 10 antennomeres, antennal club composed of 5 antennomeres, curved vertically in apical half, club 2.4–2.6 times longer than antennomeres 1–5 combined; fifth basal antennomere sharply enlarged ( Fig. 12 ). Clypeus dense punctate, anterior margin bow-shaped, emarginate and reflexed. frons punctate, punctures denser than those on pronotum and elytra, slightly convex at middle. Frontoclypeal suture defined. Frontal carina distinctly raised transversally, bent forwards medially ( Fig. 13 ). Clypeus wider and shorter than frons. Frons between eyes 3.0–3.1 times wider than eye. Ocular canthus setaceous, length of canthus 0.7 mm . Mouthparts : Labrum strongly depressed at middle ( Fig. 14 ). Mandible with developed wrinkled molar lobe and one big rounded notch one small notch in incisor lobe ( Figs. 15, 16 ). Mala of maxillae bears 4 distal teeth developed ( Fig. 17 ). Mentum bilobate at apical half; paraglossae with few setae near inner margin ( Fig. 18 ). Thorax : Pronotal surface glabrous and dense punctate. Widest of pronotum at basal 2/5; anterior, posterior and lateral margins smooth; lateral margin reflexed moderately; anterior angles obtuse; posterior obtuse rounded ( Fig. 26 ); pronotum with 7–10 long setae close to lateral margin at anterior half. Scutellum triangular, punctate laterally, 1.5-1.6 times wider than long ( Fig. 27 ). Ventral surface of thorax with long, soft yellow setae. Prosternal process wedge-shaped ( Fig. 28 ). Dorsal surface of elytra glabrous and punctate, sutural costa developed, epipleuron with soft setae before apex ( Figs. 3, 4 ). Legs : Protibia tridentate; apical spur of protibia sharp, tip reaching basal 1/3 of protarsomere 1. Metafemora covered with soft setae near anterior and rough setae near posterior margins. Outer side of metatibia with carina pubescent at apical 2/5. Dorsolateral margin of metatibia with a thorn at basal 1/4; dorsomedial margin with 3–6 thorns weakly developed ( Fig. 29 ). Apex of metatibia with two lanceolate spurs of different sizes. Metatarsi slightly longer than metatibia. Basal metatarsomere equal in length to metatarsomere 2 ( Fig. 30 ). Each claw with a tooth vertically medially ( Fig. 31 ). Abdomen : Ventrite 2 with dense short setae; ventrites 5, 6 setiferous, setae long and sparsely distributed. Pygidium fan-shaped, 1.3-1.4 times wider than long, convex at middle; dorsal surface punctate; apex with setae sparsely distributed ( Fig. 32 ). Genitalia : Phallobase shorter than parameres; phallobase connected to parameres by a triangular membrane on dorsum ( Figs. 38 ). Parameres goose-head-like, with a central concave area and tip rounded in lateral view; bases of parameres of lateral and dorsal branches enclosed with a trapezoidal membranous area ( Figs. 38, 39, 40, 41 ). Endophallus with slender temones in dorsum and a hemispherical lobe covered with dense punctual sensillae in distal part ( Fig. 42 ). Spiculum gastrale T-shaped. Female. Not studied. Diagnosis. Megistophylla grandicornis can be clearly distinguished from other Megistophylla species by the following combination of characters: antennal club composed of 5 long antennomeres, club curved vertically in apical half, length of club 2.4–2.6 times longer than basal antennomeres; head, pronotum, elytra with dorsum glabrous; pronotum with lateral margin smooth; pronotum with 7–10 long setae close to lateral margin at anterior half; epipleuron with long soft setae before apex; outer side of metatibia with completed carina; parameres goosehead-like. Distribution. China ( Chongqing , Hubei , Hunan , Guangxi , Guizhou , Jiangxi , Yunnan , Zhejiang ) ( Li et al. 2016 ), above mentioned specimens represent the first record from Fujian Province . Chinese name. 巨角多鳃金龟 Remarks. Unfortunately, we are unable to examine female specimens of Megistophylla grandicornis . All the specimens mentioned above were collected by light trapping, females of M. grandicornis might have negative phototactic response. The antennal club is composed of 5 antennomeres in the female, and is distinctly shorter than those in the male ( Xu et al . 2012 ). Megistophylla grandicornis is a severe pest in southern China . The larvae feed on the underground parts of chestnut, oak and eucalyptus; the adults feed on the foliages of chestnut, tobacco, persimmon, bamboo, pear, apple, walnut and waxberry ( Hu et al. 2010 , Xu et al . 2012 ). The adults of the species emerge from May to June with one generation per year and overwinter as larvae in Yunnan Province ( Hu et al. 2010 ).