FIG. 6 in Late Pliensbachian (Early Jurassic) ammonites from Lac de Charmes (Haute-Marne, France): Systematic, biostratigraphy and palaeobiogeography

FIG. 6. — Pleuroceras transiens (Frentzen, 1937): A, B, specimen UPMC-175, Outcrop 1, bed 8, 9; C, D, E, specimen UPMC-176, Outcrop 1, bed 8, 9. Amaltheus margaritatus Montfort, 1808; F, G, specimen UPMC-187, Outcrop 1, bed 13. Amaltheus salebrosum Hyatt, 1867; H, I, specimen UPMC-188, Outcrop 1, bed 13. Scale bar: 1 cm. The arrows indicate the beginning of the body chamber.