The water mite genusNeumania Lebert, 1879 in Australia (Acari: Hydrachnidia Author Smit, Harry text Acarologia 2021 2021-05-21 61 2 479 485 http://dx.doi.org/10.24349/acarologia/20214446 journal article 2637 10.24349/acarologia/20214446 6e5d3204-f25f-47db-b2be-d1179167692b 2107-7207 5400192 Neumania (Lemienia) australica n. sp. Zoobank: 9827A63C-A485-4D1B-A8BE-D69931A285FF ( Fig. 1A – E , 2 ) Material examined Holotype male , Maitland River , pools , at crossing with NW Coastal Highway , Western Australia , Australia , 20°51.005 S 116°36.608 E , alt. 8 m asl , 31 Jan. 2019 ( WAM ) . Paratypes : ten females ( WAM ), 11 females ( RMNH ), same data as holotype ; one male , two females , pool in Weetootla Creek, Gammon Ranges NP , South Australia , 24 Oct. 2001 ( SAM two males , Onkaparinga River at Sundews Trail, South Australia , Australia , 35°09.478 S 138°34.791 E , alt. 95 m asl, 6 Apr. 2008 ( RMNH ). Other material. Northern Territory . 2/7/0, pools upstream of Waterfall Creek, Kakadu NP , 13°25.762 S 132°25.089 E , 25 July 1994 . Western Australia . 2/5/0, pool Lennard River, Windjana Gorge NP , Kimberley, 9 Sept. 1998 ; 1/0/0, pool Lennard Gorge, Kimberley, 10 Sept. 1998 ; 1/1/0, pool Manning Gorge Falls, Kimberley, 13 Sept. 1998 ; 2/29/1, pool Amalia Gorge, El Questro Station, Kimberley, 16 Sept. 1998 ; 7/11/0, pools in creek at Old Halls Creek, S of Halls Creek, 26 Sept. 1998 ; 1/1/0, Geikie Gorge, western side, Geikie Gorge NP , 18°7 23.92 S 125°39 42.47 E , 28 Sept. 1998 . Queensland . 12/13/0, Mt Carbine Dam, Mt Carbine, 16°32.019 S 145°07.525 E , alt. 358 m asl, 14 Oct. 2005 ; 3/5/0, Porcupine Creek, Porcupine NP , 20°21.039 S 144°27.852 E , 23 Oct. 2005 ; 1/3/0, rockpool Porcupine Creek, Porcupine Gorge NP , 20°21.039 S 144°27.852 E , 23 Oct. 2005 ; 1/0/0, Yabba Creek at Peach Trees Campground, Jimna, 26°38.251 S 152°26.924 E , alt. 465 m asl, 2 Nov. 2005 . Diagnosis — Male: IV-leg-6 bowed, IV-leg-5 with a distinct ventral indentation, anterior to this indentation a bowed stout seta, IV-leg-6 relatively short. Description — Male: Idiosoma with very fine papillae, yellowish, 446 (470 – 518) long and 340 (381 – 405) wide, ventrally 454 (486 – 502) long. Apodemes of anterior coxae extending onto Cx-IV. Suture line Cx-III/IV incomplete. Area between the coxae lightly sclerotized. Gonopore ellipsoid, 61 long. Genital field with 7 – 8 pairs of acetabula, one of these distinctly larger than the others. Genital plates fused with venter without suture line. Length of P1-5: 16, 68, 40, 74, 25. P4 distally with a setal tubercle. Length of I-leg-4 – 6: 160, 172, 140. Length of IV-leg-4 – 6: 154, 178, 147. IV-leg-5 with a ventral indentation, anterior to this indentation a stout, bowed seta, ventral margin of this segment with seven pectinate setae, the five anterior setae more stout; IV-leg-6 bowed, ventral margin with 5 – 6 stout setae. True swimming setae absent, but instead legs with relatively short stiff setae. Figure 1 Neumania australica n. sp . , A – D holotype male, E paratype female. A = venter male; B = palp, C = III-leg-4 – 6; D = IV=leg=5 – 6; E = genital field female. Scale bars: A, E = 100 µm, B – D = 50 µm. Female: Idiosoma yellowish, dorsally 697 (624 – 826) long and 526 (486 – 640) wide, ventrally 648 (616 – 697) long. Integument with very fine papillae. Coxae as in male. Medial margin of Cx-IV with a strip of secondary sclerotization. Genital field with 11 – 13 pairs of acetabula, genital plate 80 long; pre-genital sclerite 66 wide. Length of P1-5: 30, 97, 52, 96, 36. Palp as in male. Length of I-leg-4 – 6: 219, 200, 140. Length of IV-leg-4 – 6: 194, 235, 194. Legs with stiff swimming setae, IV-leg-3 with two, III-leg-5, IV-leg-4 and -5 with three and III-leg-4 with four swimming setae. Figure 2 Neumania australica n. sp . , paratype male from Onkaparinga River. Scale bar = 50 µm. Etymology — Named after the Australian continent. Remarks — The male of the new species is close to N. gila . The new species has IV-leg-5 distinctly bowed over its whole length (bowed anteriorly, but straight over most of its posterior part in N. gila ), and IV-leg-6 is shorter (147 – 160 versus 225 – 258 in N. gila ). Females are not separable. The new species is similar also to N. lacustris Smit, 2002 from New Caledonia . The third leg of the male of N. lacustris is slightly modified, especially III-leg-4. The third leg of the male of the new species is hardly modified, III-leg-4 is not much broader than other segments of this leg. Smit (1992) reported N. falcipes from Queensland . I re-examined this material, lodged in RMNH, and concluded that the two males belong N to. australica n. sp . Therefore, N. falcipes must be omitted from the Australian list.