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 Author Smit, Harry Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, the Netherlands. text Acarologia 2020 2020-04-29 60 2 371 389 journal article 8262 10.24349/acarologia/20204374 32aba51d-7618-467b-9ffe-7f430d20bc7f 2107-7207 4487883 Arrenurus parviscutatus (K. Viets, 1954) ( Figure 1 ) Figure 1 Arrenurus parviscutatus K. Viets , male, dorsum. Scale bar = 100 µm. Material examined— Argentina . Entre Ríos Province : 1/2/0, ditch at Brazo Largo, N of Zarate, 33°54’37,21” S , 58°51’9,24” W , 6-xi-1999 . Description — Male: Idiosoma dorsally 721 long and 583 wide, ventrally 713 long. Dorsal shield complete, 300 long and 340 wide. Posterior to dorsal shield three irregularly shaped areas with a finer porosity. Remarks — Male and female are well-described by Rosso de Ferradás (2006b) and therefore only some measurements are given and an illustration of the male dorsum is presented. The only difference with her illustration of the male is that the associated setae of Dgl-3 are located medially and distanced of these glandularia. The areas with finer porosity are not mentioned in the original description of K. Viets (1954b) . Distribution — Known from Brazil (1954b) and Argentina ( Rosso de Ferradás 2006b ).