First record of the genus Macrispa in China, with a redescription of Macrispa saundersii Baly, 1859 (Chrysomelidae, Cassidinae, Botryonopini)

The genus <i>Macrispa</i> Baly, 1859, previously known only from Southeast Asia and south of the Himalayas, has remained unrecorded in China until now. Here, we report the first discovery of <i>Macrispa saundersii</i> Baly, 1859 from Xizang Autonomous Region, China, representing a northward range extension for the genus. Through integrative examination of external morphology and male genitalia, we provide a comprehensive redescription of <i>M. saundersii</i>. High-resolution stacked imaging was employed to document key taxonomic characters, including elytral punctation patterns, stridulatory files, abdominal ventrite structures, and male genitalia.