| Basiloterus Temporal range: Bartonian
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Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Mammalia |
| Order: | Artiodactyla |
| Infraorder: | Cetacea |
| Family: | †Basilosauridae |
| Genus: | †Basiloterus Gingerich et al., 1997 |
| Species: | †B. husseini
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| Binomial name | |
| †Basiloterus husseini Gingerich et al., 1997
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Basiloterus is an extinct genus of late-Eocene archaeocete whale from the Drazinda Formation in southwestern Punjab, Pakistan and possibly also the Barton Group (originally Barton Beds) of England. Known from two isolated lumbar vertebrae, the elongated nature of these elements has been taken as possible evidence that Basiloterus was a close relative of the better-known Basilosaurus. This was also the reasoning behind its name, which roughly translates to "another king". However, publications since then not only lead to some major changes of the internal relationships within Basilosauridae but have also called into question how diagnostic elongated vertebrae are for members of this group, as other early whales have developed similar anatomy independently. Though the identity of Basiloterus as a basilosaurid is generally maintained, its exact position within more recent interpretations of the family is unclear.