Moelleria jansseni Hoeksema, Rijken & Simons 2020

Moelleria jansseni Hoeksema, Rijken & Simons, 2020 (Fig. 5C 1, C 2) Moelleria jansseni Hoeksema, Rijken & Simons, 2020: 6, figs 1-2. MATERIAL AND DIMENSIONS. — Maximum height 0.61 mm, width 0.96 mm. — Holotype: RGM.1362824, height 0.6 mm, width 0.96 mm, leg. AWJ. — Paratypes: paratype 1, RGM.1362825, height 0.61 mm, width 0.95 mm, leg. AWJ; paratype 2, RGM.1362630 (8), leg. AWJ. ORIGINAL DESCRIPTION. — “Shell very small, wider than high, rather solid, opaque, depressed skeneiform, up to 2.25 whorls protoconch included. Suture deep, canaliculate. Protoconch paucispiral, ¾ whorls, smooth, D about 0.30 mm. Protoconch-teleoconch border delimited by shallow groove. Aperture prosocline and circular. Peristome sharp, simple, almost flat, continuous. Umbilicus open, deep, bordered by sharp peri-umbilical edge (Figs 1c, 1e, 2c, 2e). Teleoconch sculptured with ripple-like, prosocline, straight to sigmoid, flat-topped, partly dichotomous axial ribs, 40-50 on last whorl, broader than interspaces; the branched rib-parts at the periphery coalesce adapically at a short distance from the penultimate whorl and abapically on the base. Body whorl depressed, convex, weakly angled at shoulder (Hoeksema et al. 2020: figs 1d, 2d) and in two spirals around the peri-umbilical edge (Hoeksema et al. 2020: figs 1e, 2e). Dimensions: H up to 0.65 mm, W up to 1.00 mm.” (Hoeksema et al. 2020: 6). REMARKS This species is known only from Selsoif. For full discussion see Hoeksema et al. (2020: 6). DISTRIBUTION. — Lower Pleistocene: Atlantic, endemic to Selsoif (Hoeksema et al. 2020).