New records of rare water mites from New Zealand, with the description of a new genus (Acari: Hydrachnidia) Author SmitK, Harry Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, the Netherlands. & Museums Victoria Research Institute, Museums Victoria, GPO Box 666, Melbourne, VIC 3001 Author PešićK, Vladimir Department of Biology, University of Montenegro, Cetinjski put b. b., 81000 Podgorica, Montenegro. & Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, the Netherlands. text Acarologia 2024 2024-04-30 64 2 602 611 http://dx.doi.org/10.24349/vyvt-zyw6 journal article 10.24349/vyvt-zyw6 2107-7207 11449287 2252EB7D-D384-4900-822D-9A6C21E8879B Aciculacarus amalis Cook, 1983 Figure 3 New record — South Island. 1/2/0, Small stream moss forest crossing track to Fox Glacier, 43°28.954′ S , 170°01.236′ E , 209 m asl, 12.ii.2023 , 1 female dissected and slide mounted (RMNH). Remarks — Thus far, the female was unknown, and therefore a description is given below. Description — Female — Idiosoma soft and without muscle attachment sclerites ( Figure 3D ), dorsally 547 long, ventrally 625 long and 456 wide. Coxal field 348 long, Cx-III wide 328, Cx-I separated medially, gnathosomal bay V-shaped, approximately 84 long; Cxgl-4 near medial margin of Cx-IV and well posterior to the Cx-III/IV suture line, posterior margin of Cx-IV evident. Genital field with three pairs of acetabula, length of Ac–1-3: 30–34, 28–30, 25–27, respectively, pregenital sclerite 94 wide, gonopore 128 long, genital plates fused at posterior end to each other and with postgenital sclerite, surrounded by a well-developed strip of a secondary sclerotization which includes also Vgl-1 and -2 ( Figure 3E ); excretory pore terminal in position. Palp as illustrated in Figure 3A : dorsal length/height (ratio given in parentheses): P1, 30/31 (0.97); P2, 68/44 (1.55); P3, 70/39 (1.81); P4, 102/30 (3.42); P5, 42/16 (2.62). Gnathosoma elongated, pointed at anterior end ( Figure 3B ), 211 long; chelicera ( Figure 3C ) 322 long, cheliceral claw elongated and needle-like, 184 long. Dorsal lengths of I-leg ( Figure 3F ): 47, 56, 75, 109, 119, 138; dorsal lengths of IV-leg: 110, 80, 113, 156, 181, 175; swimming setae absent. Figure 2 Zelandatonia orion Cook, 1992 , male, Camp Creek. A – idiosoma, dorsal view (inset: glandularium, 2x enlarged); B – idiosoma, ventral view; C-D – palp; E – chelicera; F – I-leg-4-6; G – IV-leg-5 and -6; H – terminal part of IV-leg-6. Scale bars = 100 μm. Figure 3 Aciculacarus amalis Cook, 1983 , female, stream crossing track to Fox Glacier. A – palp; B – gnathosoma; C – chelicera; D – idiosoma, dorsal view (inset: glandularium, 2x enlarged); E – idiosoma, ventral view; F – I-leg. Scale bars = 100 μm. Distribution — Previously known from one locality on North Island, and reported here for the first time from South Island.