Diplommatina (Sinica) xiazayuensis Chen & Guo 2001

Diplommatina (Sinica) xiazayuensis Chen & Guo, 2001 Diplommatina xiazayuensis Chen & Guo, 2001: 166–169, figs 4, 5. Type locality. Zayu, Xizang Autonomous Region. Type material. Holotype IZCAS TM 1010000 (Figs 7 J, 13 J), 53 paratypes IZCAS TM 010001-010053. Brief description. Shell dextral, with about 6.5 whorls. Protoconch smooth. Penultimate whorl slightly expanded, body whorls nearly as wide. Teleoconch with thin, widely spaced, radial ribs; with ca. 8 ribs per 0.5 mm on penultimate whorl and ca. 7 ribs per 0.5 mm on body whorls. Double lip present. Columellar tooth present. No horizontal palatalis nor vertical palatalis visible. Remarks. The holotype is broken; therefore, the paratype IZCAS TM 010045 (Fig. 7 K) was also photographed. In the original literature, there are a total of 37 paratypes. However, 53 specimens match the collection locality and time in the literature and were deposited together, suggesting that the paratypes should be 53. (ICZN Art 72.4. 1).