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 corniger Koenike, 1894 Material examined— Argentina . Entre Ríos Province : 3/6/0, ditch at Brazo Largo, N of Zarate, 33°54’37,21” S , 58°51’9,24” W , 6-xi-1999 . Distribution — Known from Brazil ( Koenike 1894 , Viets 1936 , 1954a , Lundblad 1944 ) and Argentina ( Rosso de Ferradas 1981b ). Marshall (1903) reported this species from North America, but these specimens do not belong A to. corniger as the dagger-like petiole is lacking, the hump of the cauda is more pointed and the posterior end of cauda has a different shape.