Arrenurus vietsi Koenike 1911

(Fig. 13)

Material examined: 6 larvae deriving from 1 female.

Very similar to A. neumani and A. affinis, but somewhat smaller; idiosoma 224–240 µm long. Subtle differences in dorsal plate shape.

Dorsum: Dp (DpL: 210–240 µm; DpW: 152–174 µm) an ellipsoid shield, widest in mid-distance from anterior margin, clearly narrowed posteriorly. Anterior margin slightly convex, posterior margin sharpened. Antero-lateral indents deep, obtuse-angled, about 1/4 and 1/3 of plate’s length and width, respectively. DpW/ Mp1-Mp1 2.4. Mp1-Mp1 (50–59 µm) equal to Mp2-Mp2 (51–57 µm). Lp2, Mh1 pectinate. Venter: Lengths of median margins of Cp I, II, III at a ratio of 2.2:1:1.2. All setae on Cp bipectinate. Expp pentagonal, clearly wider than long. Exp in central location, distinctly above E2. Palps: PIII 1 bipectinate. Chelicerae: First segment elongated cylinder-shaped, slightly tapered anteriorly, margins somewhat bent. Legs as in A. neumani.