Wassermilben aus dem Amazonasgebiet (Hydrachnellae, Acari)

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

“…Daday's (1905) illustrations are too sketchy or even erroneous to draw any conclusions. K. Viets (1954b) came to the same conclusion as Lundblad (1930) about the glandularia anterior and posterior to the genital plates. According to Viets (1954b) the palp of A. minimus has P5 with a distinctly downturned claw and the ventral seta of P4 is without a hook, while the palp of A. rotundus has the claw of P5 more obliquely orientated and the ventral seta of P4 is with a hook.…”

“…Subgenus Megaluracarus K. Viets, 1911 Arrenurus consanguineus K. Viets, 1954 Arrenurus gladiiferus Rosso de Ferradás, 2006b(erron., non Lundblad, 1944 (Figure 3) Material examined -Bolivia. Remarks -My male specimen matches the description of K. Viets (1954b). Viets didn't illustrate the setae associated with Dgl-2 and -3, but these setae are very small and easily overlooked.…”

“…Distribution -Previously known from Brazil (Marshall 1919, K. Viets 1936, 1954b, Lundblad 1944, Guyana (Marshall 1919) and Argentina (Rosso de Ferradas 1973).…”

“…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).…”