Validation of Hypsibius nivalis Ono Takeuchi & Zawierucha, 2022 (Eutardigrada: Hypsibiidae) from Japan Author Deshmukh, Umakant Bhoopati 0000-0002-7489-7645 Institution of Higher Learning, Research and Specialised Studies, Department of Botany, Janata Mahavidyalaya, Chandrapur- 442401, Maharashtra, India. deshmukhumakant979@gmail.com text Zootaxa 2024 2024-02-01 5405 4 599 600 http://dx.doi.org/10.11646/zootaxa.5405.4.8 journal article 10.11646/zootaxa.5405.4.8 1175-5326 10603903 4D3C79BB-0D1B-4CC5-B205-D6210EBB8694 Hypsibius nivalis Ono, Takeuchi & Zawierucha, 2022 http://zoobank.org/ urn:lsid:zoobank.org:pub: E655AE4A-4EF3-43BF-BA36-9C88B8A6D171 Hypsibius nivalis sp. nov. (Figs 3–6, Table 1, and Supplementary Material 1 in Ono et al. 2022 ). Diagnosis (based on Ono et al. 2022 ): Body transparent/white, with eyes present in the examined specimens. The cuticle smooth in Phase Contrast Microscopy (PCM). Buccal apparatus of the Hypsibius type . Oral cavity armature either absent or not visible in PCM. Pharyngeal bulb with apophyses, and two rod-shaped macroplacoids. Stylet supports located in the posterior position. Apophyses for the insertion of stylet muscles hook-shaped. Hypsibius type furcae present. The macroplacoid length sequence 2<1, microplacoid and septulum absent. The apophyses clearly separated from the first macroplacoids. All macroplacoids clearly separated. All primary branches with accessory points. Cuticular bars under and between the claws absent, but a thickening under hind claws base clearly visible. Claw bases smooth. Pseudolunules poorly visible. Eggs unknown. Type material. HOLOTYPE , slide code: “April, 19, Japan snow no. 1/10” is deposited at the Graduate School of Science and Engineering, Chiba University, Chiba, Japan; 31 paratypes , slide codes: “April, Japan snow no. 1/4, 1/6–1/9, 1/15, 2/1–2/2, R/2, R/4–R6”; SEM stub codes: “2005GA no. R-1, R” are deposited at the Graduate School of Science and Engineering, Chiba University, Chiba, Japan; and four paratypes , slide codes: “ Japan snow 2/1, 2/3, 3/2” are deposited at Department of Animal Taxonomy and Ecology, Adam Mickiewicz University in Poznań, Poland. Type locality: Japan , Mt. Gassan ( 38°30’N , 140°00’E , 770 m asl ) . Description: For full description of Hypsibius nivalis see Ono et al. (2022) Etymology: Name nivalis , “related to snow” in Lain, refers to the environment where the species was found.