Arrenurus consanguineus K. Viets, 1954

Smit, Harry, 2020, 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, Acarologia 60 (2), pp. 371-389 : 374-377

Arrenurus consanguineus K. Viets, 1954

Arrenurus gladiiferus Rosso de Ferradás, 2006b (erron., non Lundblad, 1944)

( Figure 3 )

Material examined— Bolivia. 1/5/0, pond Hotel Flora y Fauna, 3 km SE of Buena Vista, 17°29.949 S 63°38.152 W, 10-iii-1999, leg. D. Tempelman.

Description — Male: Idiosoma dorsally 616 long and 454 wide, ventrally 648 long. Dorsal shield incomplete (but dorsal furrow continues ventrally); dorsal shield 340 wide, distance dorsal shield – anterior idiosoma margin 109. Medial margin of fourth coxae longer than medial margin of third coxae. Gonopore 42 long, genital field 365 wide, rather broad. Length of P1-5: 30, 64, 40, 60, 32. P2 with 7-8 large, sword-like setae.

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. The specimen reported from Argentina by Rosso de Ferradás (2006b) A as. gladiiferus doesn’t belong to that species but A to. consanguineus . Arrenurus gladiiferus has a convex posterior margin of the cauda without an indentation, and the setae of P2 are gradually tapering and not sword-like as in A. consanguineus .

Distribution — Previously known from Brazil (K. Viets 1954b) and Argentina ( Rosso de Ferradás 2006b, as A. gladiiferus ).

Figures

Figure 3 Arrenurus consanguineus K. Viets, male. A – dorsum; B – venter; C – palp. Scale bars: A-B = 100 µm, C = 50 µm.