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 Genus Metalycaeus Pilsbry, 1900 Metalycaeus Pilsbry, 1900: 382 . Type species. Alycaeus ( Metalycaeus ) melanopoma PILsbry, 1900 (syNONym Of Chamalycaeus nipponensis [REINHardT, 1877], sEE MINaTO 1988 ), by sUbsEqUENT dEsIGNaTION ( THIELE 1929 ). Remarks. THE GENErIC LEvEL rEvIsION Of THE ALyCaEIdaE Is IN prOGrEss. HErE wE rEfraIN frOm GIvING a dIaGNOsIs, aNd TENTaTIvELy CLassIfy aLL CHINEsE, LaO aNd VIETNamEsE spECIEs IN Metalycaeus , wHICH HavE spIraLLy sTrIaTEd prOTOCONCHs. BOTH Metalycaeus aNd Chamalycaeus HavE spIraL sTrIaE ON THE TELEOCONCH, bUT THE spIraL sTrIaTION Is mIssING ON THE prOTOCONCH Of THE LaTTEr ( FIGUrE 46 ).