Revision of the Alycaeidae of China, Laos and Vietnam (Gastropoda: Cyclophoroidea) I: The genera Dicharax and Metalycaeus Author Asami, Takahiro text Zootaxa 2017 2017-10-11 4331 1 1 124 journal article 31855 10.11646/zootaxa.4331.1.1 14c29731-224f-43a4-ae52-f76823177ce5 1175-5326 1009725 FB50725E-4D03-4507-9CAF-EB939C7F548F Pincerna Preston, 1907 Alycaeus ( Pincerna ) Preston, 1907 : 206 . Pincerna — Páll-Gergely, 2017 : 214 . Type species. Alycaeus ( Pincerna ) liratula PrEsTON, 1907 ( FIGUrE 3D ), by OrIGINaL dEsIGNaTION. Species inhabiting China , Laos and Vietnam . P. costulosa ( Bavay & DaUTzENbErG, 1912 ) ( FIGUrE 3F ), P. maolanensis (LUO, ZHaNG & ZHUO 2009 ). Remarks. ALL spECIEs wErE ExamINEd. Pincerna was ErECTEd fOr a sINGLE spECIEs, Alycaeus ( Pincerna ) liratula basEd ON THE OUTEr sUrfaCE Of THE OpErCULUm, wHICH Has a "HOLLOw prOTUbEraNCE IN THE fOrm Of a CIrCULar CUp". THIs NamE was UsEd as a syNONym Of Alycaeus IN sUbsEqUENT pUbLICaTIONs. THE OUTEr sUrfaCE Of THE OpErCULUm Is TOO varIabLE TO bE UsEfUL fOr GENUs-LEvEL CLassIfICaTION Of aLyCaEId spECIEs (UNpUbLIsHEd INfOrmaTION, PáLL-GErGELy et al. IN prEp.). HOwEvEr, THE NamE Pincerna CaN bE UsEd aT THE GENUs LEvEL fOr spECIEs THaT sHarE THE fOLLOwING TraITs: spIrE ELEvaTEd (sHELL dIamETEr aNd sHELL HEIGHT arE rOUGHLy THE samE mEasUrEmENT, Or sHELL HEIGHT Is LarGEr), sHELL OvOId Or GLObOsE, prOTOCONCH wITHOUT spIraL sTrIaTION, R1 wITH fINE spIraL sTrIaTION, R2 sHOrT TO vEry sHOrT, smOOTH Or wITH LOw wrINkLEs. THE GENUs Cycloryx GOdwIN-AUsTEN, 1914 Is a syNONym Of Pincerna ( PáLL-GErGELy 2017 ).