FIG. 28 in Systematics and phylogeny of the fossil beaked whales Ziphirostrum du Bus, 1868 and Choneziphius Duvernoy, 1851 (Mammalia, Cetacea, Odontoceti), from the Neogene of Antwerp (North of Belgium)

FIG. 28. — Pelycorhamphus pertortus Cope, 1895, right premaxillary sac fossa and base of the rostrum (USNM 13796, holotype), from the Miocene of the Chesapeake Group (east coast of the USA), dorsal view. Scale bar: 100 mm. ; Published as part of Lambert O., 2005, Systematics and phylogeny of the fossil beaked whales Ziphirostrum du Bus, 1868 and Choneziphius Duvernoy, 1851 (Mammalia, Cetacea, Odontoceti), from the Neogene of Antwerp (North of Belgium), pp. 443-497 in Geodiversitas 27 (3) on page 482, DOI:10.5281/zenodo.5376445