Gryphaeidae indet.

Plate 2, figs 5, 6

Material.

Four single valves, partly preserved as internal moulds, from the upper member close to the Demul Pass (SNSB-BSPG 2020 XCIX 37-38).

Description and remarks.

The comparatively small (H: 11-19 mm), poorly preserved specimens are nearly flat and covered with irregular growth rugae. The available features preclude a precise identification. Possibly, they belong to the common Jurassic genus Liostrea Douvillé, 1904.