Metalycaeus Pilsbry, 1900

Asami, Takahiro, 2017, Revision of the Alycaeidae of China, Laos and Vietnam (Gastropoda: Cyclophoroidea) I: The genera Dicharax and Metalycaeus, Zootaxa 4331 (1), pp. 1-124 : 73

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 ).

Figures

FIGURE 46. Type species of alycaeid genera and SEM images of their embryonic whorls. A – C. Metalycaeus nipponensis (Reinhardt, 1877). A. lectotype (ANSP 78815) of Alycaeus (Metalycaeus) melanopoma Pilsbry, 1900, the type species of Metalycaeus Pilsbry, 1900, Hakone Mts., Japan, leg. Schmacker. B – C. Japan, Stukui Town, Shida pass, leg. K. Ohara, 0 6 June 1986, HNHM 99701. D – F. Alycaeus (Chamalycaeus) fruhstorferi Möllendorff, 1897 (type species of Chamalycaeus Möllendorff, 1897). D. Java, leg. Fruhstorfer, coll. Möllendorff (lectotype, SMF 109481). E – F. W. Java, Mt. Gede, 4000 ', leg. Fruhstorfer, Aug 1892, E. R. Sykes coll. 1954, NHMUK 20150361. Photos: Anonymous (A: downloaded from the website of the ANSP); B. Páll-Gergely (B – C, E – F); F. Walther (D). Small white arrows indicate the protoconch-teleoconch boundary. Uppermost scale represents 5 mm and refers to figs A and D.