Taxonomic revision of Serica MacLeay, 1819 (sensu lato) from China and adjacent areas (Coleoptera: Scarabaeidae: Melolonthinae: Sericini), with updates on Nipponoserica Nomura, 1972 Author Ahrens, Dirk 0000-0003-3524-7153 ahrens.dirk_col@gmx.de Author Fabrizi, Silvia 0000-0003-3524-7153 ahrens.dirk_col@gmx.de Author Bai, Ming 0000-0001-9197-5900 baim@ioz.ac.cn Author Liu, Wangang 0000-0003-3524-7153 ahrens.dirk_col@gmx.de text Zootaxa 2022 2022-09-13 5186 1 1 83 journal article 173357 10.11646/zootaxa.5186.1.1 9c867399-283c-446b-8fb3-5b89c6ace674 1175-5326 7073769 8FD49F1A-2449-4F25-B53B-09839DB623F3 Serica (subgenus Taiwanoserica Nomura, 1974 ) Remarks. Taiwanoserica Nomura, 1974 was originally described as genus from Taiwan , from where a number of endemic species have so far been reported (Kobayashi 1983, 1988, 1993; Kobayashi & Yu 2000; Ahrens 2002 , 2006, 2007b; Ahrens & Bezděk 2016 ). Based on results of a morphology-based phylogeny ( Ahrens 2007c ) it was ranked subsequently as a subgenus of Serica ( Ahrens 2007b ) . Taiwanoserica was later, based on a morphologybased phylogeny (Ahrens 2009), also reported from western China . In subsequent molecular phylogenies Taiwanoserica resulted to be sister group of the Serica (s. str.) ( Liu et al. 2015b ; Eberle et al. 2017 ), thus its subgenus rank was confirmed. Herein, we describe six additional new species from western China , northern Vietnam and Taiwan . Key to species of the subgenus Taiwanoserica from continental Asia ( ♂ ) # : 5 1 Dorsomedian lobe of endophallus strongly sclerotized, and externally visible. Posterior angles of pronotum convex........ 2 - Dorsomedian lobe of endophallus small, membraneous, and externally not always visible. Posterior angles of pronotum blunt. ................................................................................................... 7 2 Dorsomedian lobe of endophallus as long as parameres........................................................ 3 - Dorsomedian lobe of endophallus much shorter than parameres................................................. 6 3 Dorsal and ventral lobe of the left paramere have not the same median main axis................................... 4 - Dorsal and ventral lobe of the left paramere have the same median main axis....................................... .......................................................... S. ( T .) taishun Ahrens, Fabrizi & Liu , new species 4 Ventral lobe of the left paramere robust and ventrally curved. Dorsal lobe of the left paramere narrow, at maximum three times as long as wide.................................................................. S. ( T .) silviae Ahrens, 2009 - Ventral lobe of the left paramere only filiform and small, dorsally curved. Left paramere with massive dorsal lobe which is twice as long as wide.................................................................................. 5 5 Dorsal lobe of the left paramere large. Basal lobe of the right paramere long, widely curved and directed distally............................................................ S. ( T .) kuankuoshuiensis Ahrens, Fabrizi & Liu , new species - Dorsal lobe of the left paramere much smaller and shorter. Basal lobe of the right paramere very shorter and directed basally. ................................................. S. ( T .) tianpingshanensis Ahrens, Fabrizi & Liu , new species 6 Ventral phallobase not widened. Dorsal lobes of both parameres almost straight. ( China ) ... S. ( T .) sigipinensis Ahrens, 2009 - Ventral phallobase bluntly widened. Dorsal lobes of both parameres strongly arched. (northern Vietnam )................. ........................................................ S. ( T .) limbourgi Ahrens, Fabrizi & Liu , new species 7 Both lobes of parameres directed distally................................................................... 8 - Both lobes of parameres directed mediobasally................................... S. ( T .) chengtuensis Ahrens, 2009 8 Both lobes of parameres large, subequal in length to phallobase. ................... S. ( T .) wenchuanensis Ahrens, 2009 - Lobes of parameres small (particularly the ventral one), distinctly shorter than phallobase............................ 9 9 Dorsal lobe of the right paramere strongly curved (dorsal view). Dorsal lobe of the left paramere preapically abrubtly bent........................................................... S. ( T .) hailuogou Ahrens, Fabrizi & Liu , new species - Dorsal lobe of the right paramere straight (dorsal view). Dorsal lobe of the left paramere preapically evenly bent.................................................................. S. ( T .) huangjing Ahrens, Fabrizi & Liu , new species