FIGURE 4 in Bajoprosopon piardi n. gen. and sp. from the Middle Jurassic of France, with a revised diagnosis of the family Prosopidae von Meyer, 1860 (Brachyura, Podotremata) and notes on the availability of names introduced by Hermann von Meyer (1835, 1857)

FIGURE 4. Holotype of Bajoprosopon piardi n. gen. and sp. (MAB k.3764) from the upper Bajocian 'Oolithe ferrugineuse de Bayeux' Formation (upper garantiana ammonite Zone, dichotoma ammonite Subzone) at the 'Les Fours à Chaux' outcrop between Croisilles and Les Moutiers-en-Cinglais (Calvados, France; Figure 1). A, dorsal view of carapace. B, frontal view of carapace. C, left lateral view of carapace. Scale bar equals 5 mm.