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 gressitti ( Frey, 1970 ) comb. nov. Figs 5–7 , 65 Holotrichia gressitti Frey, 1970: 249 , 263 ( type loc.: Vientiane , Laos ). Diagnosis External morphology of adult ( Fig. 65 ). Body size 18.6 mm . Dorsal surface glabrous, shiny appearance. Clypeus shorter than frons, flat, oblique sides, anterior edge strongly emarginate at middle. Frons with carina moderately developed. Pronotal anterior margin glabrous, moderately wavy forward just behind eyes; posterior margin glabrous, finely flanged with a row of punctures except at middle; lateral margins moderately serrated almost smooth with a few short setae; anterior and posterior angles obtuse, anterior angle not projected forward. Prosternal process cone-shaped. Scutellum glabrous, with scattered punctures and sides without punctures. Elytra with punctures bigger than those of pronotum, epipleuron with a few short setae at basal part. Foretibia with dorsal carina moderately developed; insertion of inner spur closer to third outer tooth than second one. Meso- and metatibia with transverse carina interrupted at middle and complete, respectively; inner margin of dorsal surface with few spines. Prepygidium and pygidium with scattered punctures and glabrous, pygidium with apical margin pubescent, widened and moderately raised. Ventrites 3 and 4 with inconspicuous punctures and glabrous. Ventrite 5 not depressed at posterior half, with pubescence of different length, with conspicuous scattered punctures. Ventrite 6 moderately bulging at anterior margin, with long pubescence near posterior margin. Male and female genitalia as described above (genital morphotype II “ Gressitti ”). Male genitalia: parameres ( Fig. 5 ) with all branches of dorsal complex shorter than ventral branches. Endophallus ( Fig. 6 ) with a strong raspulae with numerous setae. Female genitalia ( Fig. 7 ). Material examined Paratype LAOS • 1 ♀ ; Vientiane ; 15 Jun. 1965 ; Ban Van Eue leg.; G. Frey 1969 det.; NHMB . Remarks Frey (1970) described Holotrichia gressitti based on three female specimens designated as a holotype and two paratypes , remaining the male unknown. We have studied one paratype (NHMB) which shows external morphology characteristic of Miridiba . Moreover, female genitalia has features not shared with species of other genital morphotypes. Hence, the female genitalia of morphotype II “ Gressitti ” was described based on this species ( Fig. 7 ). Moreover, the male genitalia of M. gressitti is described based on a paratype of Miridiba herteli (see remarks under M. herteli ), which is described in morphotype II “ Gressitti ” ( Figs 5–6 ). Distribution Laos ( Vientiane ).