Pycnolepas landenica Withers, 1953

Original description. Withers (1953: 348, pl. 60, figs 1–6).

Type. IRScNB unregistered, a right scutum.

Locality and stratigraphy. Wansin, northeast of Namur, southern Belgium; base of ‘Landenian’ sands (= now Hannut Formation, of early-middle Thanetian [late Paleocene] age, c. 55–53 Ma); see Laga et al., 2002; De Geyter et al., 2006).

Remarks. Va l v e s o f P. landenica have few and comparatively widely spaced transverse and longitudinal ridges; carina narrowly semiconical; rostrum widely semiconical; scutum with apical part very slightly attenuated and incurved, and longitudinal ridges extending straight down from apex; tergum with apico-basal ridge curved, inner occludent and carinal edges narrowly raised. Upper latus and imbricating plates unknown.

Occurrence. Known only from the type locality; no subsequent records.