Revision of the genus Miridiba Reitter, 1902 (Coleoptera, Scarabaeidae, Melolonthinae): genital morphotypes and new taxonomic data Author Gao, Chuan-bu D260A269-8B1F-41CE-AD17-703E2BBE07F3 Guangdong Key Laboratory of Animal Conservation and Resource Utilization, Guangdong Public Laboratory of Wild Animal Conservation and Utilization, Institute of Zoology, Guangdong Academy of Sciences, 105 Xingang Road W., Guangzhou 510260, China. Unidad de Protección Vegetal. Centro de Investigación y Tecnología Agroalimentaria (CITA) e Instituto Agroalimentario de Aragón (IA 2) (CITA-Universidad de Zaragoza), Avenida Montañana, 930. 50059 Zaragoza, Spain. & Buzh. Buzh.Gao@msn.com Author Coca-Abia, María Milagro AA630400-F786-448F-952E-DC786CA8644A mcoca@aragon.es text European Journal of Taxonomy 2021 2021-05-12 749 1 94 http://dx.doi.org/10.5852/ejt.2021.749.1355 journal article 6634 10.5852/ejt.2021.749.1355 83109e54-596a-4be0-ac2c-c4e1702cfb8a 2118-9773 4770293 25FD5744-861D-45E4-B6AD-350716AA29BF Miridiba ciliatipennis (Moser, 1913) comb. nov. Figs 23 , 98 Holotrichia ciliatipennis Moser, 1913b: 344 ( type loc.: Vietnam ). Holotrichia ciliatipennis – Chang 1964: 146 , 149–150, figs 54–55 (species list; in key). Neodontocnema ciliatipennis – Frey 1970: 245 , figs 1–2 (combination). Figs 98–99. 98 . Miridiba ciliatipennis (Moser, 1903) , lectotype, ♂ (MFNB), habitus in dorsal view. 99 . M. brunneipennis ( Moser, 1916 ) , lectotype, ♂ (MFNB), habitus in dorsal view. Scale bars = 5.0 mm. Diagnosis External morphology of adult ( Fig. 98 ). Dorsal surface glabrous and densely punctate. Clypeus with anterior edge widely emarginate at middle and oblique laterally. Frontal carina developed and sharp. Anterior pronotal margin flanged, with a concavity moderately developed at each lateral end; posterior margin glabrous; lateral margins smooth, elevated laterally at anterior third; anterior angle acute; posterior angle obtuse and rounded. Scutellum densely punctate. Elytral surface with punctures more scattered than those on pronotum; epipleuron with long yellow setae along all its length. Foretibia with dorsal carina moderately developed. Meso- and metatibia with transverse carina interrupted at middle; inner margin of metatibial dorsal surface with two strong spines. Pygidium dense punctate and conspicuously pubescent; apex with long pubescence. Ventrites punctate and conspicuously pubescent. Ventrite 2 with short pubescence decumbent. Ventrites 3 and 4 with scattered pubescence at middle. Ventrite 5 with long pubescence on posterior half, irregularly distributed. Ventrite 6 with long pubescence along posterior margin. Male genitalia: parameres ( Fig. 23 ) with dorsal branches of dorsal tubular complex sharp apically and with a tendency to converge ( Fig. 23A ), apices of ventral branches of dorsal tubular complex convergent ( Fig. 23B ) and curved ventrally ( Fig. 23C ); in lateral view, dorsal and ventral branches of dorsal tubular complex forming a semi-circular concavity ( Fig. 23C ). Ventral branches reduced. Phallobase longer than parameres. Endophallus, temones and female genitalia not studied. Material examined Lectotype (here designated) VIETNAM • ♂ ; “ Annam ” [Centre of Vietnam]; “ Miridiba ciliatipennis (Moser, 1913) CH. Bu Gao det. 2017”; MFNB . Paralectotype (here indicated) VIETNAM • 1 ♀ ; same collection data as for the lectotype; MFNB . Other material VIETNAM • 1 ♂ , 1 ♀ ; Frey det.; MFNB . Remarks Moser (1913b) described Holotrichia ciliatipennis without indicating how many species he studied. Frey (1970) transferred this species to Neodontocnema Arrow, 1948 and illustrated the parameres only in dorsal view.The first author of the present paper has examined four specimens of H. ciliatipennis (MFNB) ( 3 males and 1 female , including two types ), which show external and genital features that characterize Miridiba . However, male genitalia show features not shared with species belonging to other genital morphotypes of Miridiba . Hence, we transfer H. ciliatipennis to Miridiba and describe the male genitalia morphotype IX “ Ciliatipennis ” based on this species. Moreover, we designate lectotype and paralectotype . Distribution Vietnam , Thailand .