The family Ptiliidae, also called featherwing beetle because of their remarkable feather-like hind wings, is group of the smallest beetles, with their body size generally about 1 mm long. Although more than 1,000 valid ptiliids within approximately 100 genera are distributed worldwide, this family remains one of the least understood beetle groups in Korea. In this study, we introduce 13 known Korean ptiliids species within seven genera and additional some unknown species. All available information about Korean ptiliids, including their natural histories, distributional data, and diagnostic characters are provided.

Discheramocephalus Johnson was first described from the Solomon Islands as monotypic genus. According to recent studies, this genus comprised 19 species from Afrotropical, Australasian, Indomalayan, and Neotropical realms. These ranges of distribution suggest that Discheramocephalus is pantropical genus. In this study, we describe a Discheramocephalus species from Korea and report a species new to the Palearctic realm. Illustrations of habitus, genital characters and collection localities, a distributional map, and a checklist of the genus Discheramocephalus are also provided.

깨알벌레과는 전세계적으로 약 100속, 1,000여 종이 알려져 있다. 깨알벌레들은 다양한 서식처에서 채집되며, 깃털 모양의 날개와 작은 크기 로 쉽게 구분된다. 이 중 Acrotrichis속은 깨알벌레과의 약 4분의 1을 차지하나, 국내에서는 Acrotrichis lewisii (Matthews, 1884b)만이 2020년에 처음으로 기록되었다. 본 연구에서는 전국 농경지 생물상 변동조사 중 제주에서 채집된 A. thoracica (Waltl, 1838)와 A. grandicollis (Mannerheim, 1844)를 국내에 처음으로 보고한다. 이 두 종의 외형과 세부 사진, 분포도 그리고 한국산 Acrotrichis속의 분류키를 함께 제공한다.