FIG. 4 in The molluscs of the "Falunière" of Grignon (Middle Lutetian, Yvelines, France): quantification of lithification bias and its impact on the biodiversity assessment of the Middle Eocene of Western Europe

FIG. 4. — Comparison of two species of Glycymeris Da costa, 1778 under natural light (A, C) and under UV light (B, D): A, B, Glycymeris pulvinata (Lamarck, 1805) right valve (external view), MNHN.F.A25067 (Faullummel coll.), Grignon (Yvelines, France); C, D, Glycymeris dispar (Defrance, 1826) left valve (external view), MNHN.F.A26015, Grignon (Yvelines, France). Scale bar: 2 cm. Photo: P. Loubry.Published as part of Sanders, Malcolm T., Merle, Didier & Villier, Loïc, 2015, The molluscs of the "Falunière" of Grignon (Middle Lutetian, Yvelines, France): quantification of lithification bias and its impact on the biodiversity assessment of the Middle Eocene of Western Europe, pp. 345-365 in Geodiversitas 37 (3) on page 351, DOI: 10.5252/g2015n3a4, http://zenodo.org/record/453531