The genus Nipponophloeostiba Watanabe, 1962 The genus Nipponophloeostiba was originally described for N. verrucifera Watanabe, 1962 from Izu islands, Japan. Based on the published (Watanabe 1962, Shavrin 2020 a, 2020b, 2023a) and the present data, the genus contains five species from south-eastern part of the Palaearctic and Oriental regions: N. explanata Shavrin, 2023 (Indonesia: Bali), N. verrucifera Watanabe, 1962 (south Japan), N. thayeri Shavrin, 2020 (Malaysia), N. longilobata Shavrin, 2020 (Laos), and N. hornabrooki sp. n. (Papua New Guinea) (Watanabe 1962, Shavrin 2020 a, 2020b, present study). The distribution of the genus is shown in the Fig. 11. Species of this genus have flattened and elongate body, well-developed postocular parts of the head, two elongate carinae in basal portion of the head and two small tubercles near apical margins of the pronotum (for details see Watanabe 1962, 1990, Shavrin 2020 a, 2020b).

Published as part of Shavrin, Alexey V., 2024, Twenty-one new species of Omaliini from the Papuan Region (Coleoptera: Staphylinidae: Omaliinae), with diagnostic and faunistic notes on some species of the genus Paraphloeostiba Steel, 1960, pp. 251-307 in Zootaxa 5424 (3) on page 252, DOI: 10.11646/zootaxa.5424.3.1, http://zenodo.org/record/10821214