Iberina mazarredoi Simon, 1881

Figs. 3A, 4A, 5A.

Iberina mazarredoi Simon, 1881 — Simon 1881: p. 127 (descr. ♂ ♀).

I. mazarredoi — Ledoux (2014): p. 32, Figs. 6A–D (♂ ♀).

I. mazarredoi — Fernández-Pérez et al. (2014): p. 80, Figs. 7–9 (♂ ♀).

Material examined. SPAIN: Cantabria, S. Roque de Riomiera, Sima PO-153, 12 Nov 2016, 1 ♂, leg. C. Prieto, M. Gutiérrez and J. A. Noriega (FC-ZUPV, No. 4194) • Bizkaia, Galdames, Sima Escachabel-2, 30 Nov 2014, 1 ♀, leg. C. Prieto and A. Calvo (FC-ZUPV, No. 2654) .

Description. ♀ (from Galdames, Spain). CW 0.54 mm. The carapace is pale yellow, and the abdomen is a pale whitish grey. Leg measurements: I: 2.25 (0.66, 0.22, 0.52, 0.44, 0.41); II: 2.14 (0.64, 0.21, 0.47, 0.42, 0.40); III: 1.96 (0.56, 0.20, 0.41, 0.42, 0.37); IV: 2.55 (0.72, 0.21, 0.59, 0.58, 0.45). The vulva has two pairs of small spermathecae, far in the front of the epigastric fold (Fig. 5A).

♂ (from S. Roque de Riomiera, Spain): The tibial apophysis starts with a conical narrowing of the tibia and has cuttings (Fig. 3A). The tip of the cymbium is rounded and the embolus makes about three turns around the bulbus (Fig. 4A) .

Ecology. Exclusively in caves.

Geographic distribution. Endemic to a limited territory in the Basque-Cantabrian Region (Spain) and in the western part of the Pyrenees Mts. (France) (Fernández-Pérez et al. 2014).