Zebinidae (Caenogastropoda, Rissooidea) from Hainan Island, China, with re-description of four species

In this study, we document four marine microgastropod species belonging to the family Zebinidae Coan, 1964 from Hainan Island, China: <i>Schwartziella triticea</i> (Pease, 1861), <i>Pandalosia subfirmata</i> (O. Boettger, 1887), <i>Zebina tridentata</i> (Michaud, 1830) and <i>Stosicia annulata</i> (Dunker, 1860). Scanning electron microscopy (SEM) was employed to examine shell morphology. Amongst these, <i>Stosicia annulata</i> (Dunker, 1860) represent a new record for China, suggesting that more extensive sampling along Hainan Island's coastline will likely yield additional discoveries.