|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Mammalia - Cetacea - Basilosauridae
It was synonymized subjectively with Pontogeneus brachyspondylus by Gingerich (2015).
|Year||Name and author|
|2005||Cynthiacetus maxwelli Uhen p. 160 figs. 1-7|
|2008||Cynthiacetus maxwelli McLeod and Barnes p. 94|
|2008||Cynthiacetus maxwelli Uhen p. 561|
|2009||Cynthiacetus maxwelli Uhen p. 93|
|2011||Cynthiacetus maxwelli Martinez-Cáceres and Muizon|
|2011||Cynthiacetus maxwelli Schouten p. 18|
|2013||Cynthiacetus maxwelli Uhen p. 10 figs. Figure 6|
|2017||Cynthiacetus maxwelli Martínez-Cáceres et al. p. 16|
|2018||Cynthiacetus maxwelli Uhen|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|M. D. Uhen 2005||Large body size distinguishes Cynthiacetus from other dorudontines. Skull, cervical vertebrae, and anterior thoracic vertebrae are similarin morphology to those of Basilosaurus. The posterior thoracic vertebrae, lumbar vertebrae, and anterior caudal vertebrae are not elongate, but have proportions similar to other dorudontines, distinguishing Cynthiacetus from Basilosaurus.|
|M. D. Uhen 2013||C. maxwelli differs from C. peruvianus in that it has one more accessory denticle on both the mesial and distal edges of p3 and p4; an anteroposteriorly longer and lower dome-shaped neural arch on the atlas; a proxi- modistally shorter and anteroposteriorly more robust hu- merus, radius and ulna (after Martínez-Cáceres and de Muizon, 2011).|
|M. Martínez-Cáceres et al. 2017||Cynthiacetus maxwelli di ers 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).