New records of the water mite genus Arrenurus Dugès, 1834 from South America (Acari: Hydrachnidia: Arrenuridae), with the description of five new species and one new subspecies Smit, Harry Acarologia 2020 2020-04-29 60 2 371 389 Smit, 2020 Smit 2020 [491,793,1963,1989] Arachnida Arrenuridae Arrenurus Animalia Trombidiformes 13 383 Arthropoda species surinamensis  Zoobank: 1890056E-62CD-4357-A995-E030C560AA77   Figure 9  Arrenurus surinamensis  n. sp., A-D holotype male, E paratype female. A – dorsum; B – venter; C – left palp; D – right palp; E – venter. Scale bars: A-B = 100 µm, C-D = 50 µm. ( Figure 9)   Material examined—  Holotypemale, roadside pond along Afobakaweg, Surinam, 5°36.266 N 55°05.988 W, alt.  13 masl,  19-xi-2019( RMNH). Paratypes: three females, same data as holotype( RMNH).   Diagnosis— Male: Anterior part of idiosoma wide, dorsal shield distanced from anterior idiosoma margin, with Dgl-2 and Dgl-3 close together. Cauda relatively short, with a rounded posterior margin. Female: Cx-IV without medial margin.   Description— Male: Idiosoma yellowish, dorsally 794 long and 492 wide, ventrally 818 long. Dorsal shield 388 wide, Dgl-2 and Dgl-3 close together, postocularia more or less between accompanying setae of Dgl-2. Distance dorsal shield – anterior idiosoma margin 178. Cauda relatively short, with a rounded posterior margin; Dgl-4 on small humps. Gonopore 40 long, genital field swollen, extending to lateral idiosoma margin; genital field 324 wide Length of P1-5: 28, 62, 34, 68, 38; P2 medially with two small setae, antagonistic bristle of P4 short. Lengths of I-leg-4-6: 90, 88, 90. Length of IV-leg-4-6: 152, 138, 140; IV-leg-4 without spur. Legs with numerous swimming setae.   Figure 10  Arrenurus tempelmani  n. sp., holotype male. A – dorsum; B – venter; C – lateral view; D – palp. Scale bars: A-C = 200 µm, D = 50 µm. Female: Idiosoma dorsally 697 (697-713) long and 603 (603-624) wide, ventrally 713 (697-729) long. Dorsal shield complete, 575 (567-575) long and 470 (470-494) wide. Cx-I slightly extending beyond anterior idiosoma margin, Cx-IV without medial margin. Gonopore 112 long, genital field 458 wide. Genital plates relatively broad Length of P1-5: 24, 42, 70, 30; palp as in male. Length of I-leg-4-6: 86, 84, 82. Lengths of IV-leg-4-6: 114, 98, 96. Legs with numerous swimming setae.   Etymology— Named after the country of the typelocality.   Remarks— The new species is most close to  Arrenurus nitidusK. Viets, 1937from Brazil, known from the male only. The latter species differs in a less wide anterior idiosoma (including the dorsal shield), a different configuration of the glandularia and associated setae of the dorsal shield (compare Figure 179 of K. Viets (1954a)with Figure 9A) and a straight posterior margin of the cauda. Unfortunately, Viets (1954a)didn’t illustrate the postocularia of  A. nitidus. 3034067303 2019-11-19 RMNH Suriname 13 5.604433 Afobakaweg 1 -55.0998 14 384 1 holotype