Cynthiacetus maxwelli Uhen, 2005

Martínez-Cáceres, Manuel, Lambert, Olivier & Muizon, Christian de, 2017, The anatomy and phylogenetic affinities of Cynthiacetus peruvianus, a large Dorudon-like basilosaurid (Cetacea, Mammalia) from the late Eocene of Peru, Geodiversitas 39 (1), pp. 7-163 : 16

Cynthiacetus maxwelli Uhen, 2005

Zeuglodon cf. brachyspondylus – Müller 1849: 26-28. — Kellogg 1936: 248 (in part).

HOLOTYPE. — MMNS VP 445. It includes a partially preserved skull, dentaries, upper and lower dentitions, petro-tympanic complex, humerus, radius, ulna, cervical, thoracic and lumbar vertebrae.

TYPE LOCALITY. — Cynthia Clay Pit, Hinds County , Mississippi, USA.

TYPE HORIZON. — Yazoo Clay Formation, Priabonian, late Eocene.

EMENDED DIAGNOSIS. — Cynthiacetus maxwelli differs mainly from C. peruvianus in having one more cusp on both mesial and distal edges on p3 and p4 (5 and 6 denticles respectively in p3 and p4). It also possesses a longer and lower dome-shaped neural arch on the atlas and shorter and more massive humerus, radius and ulna (cf. below).