New record of the genus <i>Mastoniaeforis</i>(Gastropoda: Triphoridae) from Vietnam

Abstract

Species of the genus Mastoniaeforis are mainly distributed in the Indo-West Pacific with ten species being recorded in the world. To date this genus was not recorded in Vietnam. Specimens of three species, M. chaperi , M. lifuana and M. speciosa, were collected in two field trips from May, 2019 to October, 2020 in Truong Sa archipelago (Spratly Islands), Khanh Hoa Province, Vietnam. The diagnostic characters, distribution, and illustrations of three Mastoniaeforis species in Vietnam are provided.