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Taxonomy
Praekogia was named by Barnes (1973) [Sepkoski's age data: T Mi-u Sepkoski's reference number: 746]. It was considered monophyletic by Uhen et al. (2008).
It was assigned to Physeteridae by Barnes (1977) and Carroll (1988); to Cetacea by Sepkoski (2002); to Kogiidae by Vidal (1991), Uhen et al. (2008), Velez-Juarbe et al. (2015), Marx et al. (2016) and Berta (2017); and to Kogiinae by Barnes (1973), Muizon (1990), McKenna and Bell (1997), Kazár (2002) and Collareta et al. (2017).
It was assigned to Physeteridae by Barnes (1977) and Carroll (1988); to Cetacea by Sepkoski (2002); to Kogiidae by Vidal (1991), Uhen et al. (2008), Velez-Juarbe et al. (2015), Marx et al. (2016) and Berta (2017); and to Kogiinae by Barnes (1973), Muizon (1990), McKenna and Bell (1997), Kazár (2002) and Collareta et al. (2017).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1973 | Praekogia Barnes |
| 1977 | Praekogia Barnes p. 331 |
| 1988 | Praekogia Carroll |
| 1990 | Praekogia Muizon p. 297 |
| 1991 | Praekogia Vidal p. 5 |
| 1997 | Praekogia McKenna and Bell p. 381 |
| 2002 | Praekogia Kazár p. 163 |
| 2002 | Praekogia Sepkoski |
| 2008 | Praekogia Uhen et al. p. 574 |
| 2015 | Praekogia Velez-Juarbe et al. p. 15 figs. Fig. 10 |
| 2016 | Praekogia Marx et al. p. 123 |
| 2017 | Praekogia Berta p. 161 |
| 2017 | Praekogia Collareta et al. p. 269 figs. Figure 6 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. D. Uhen et al. 2008 | Praekogia differs from the Recent species of Kogia by having dense rather than spongy cranial bone; lower cranial crests; orbit situated anterior to the end of the zygomatic process of the squamosal, not posteriorly within the temporal fossa; small skull, slightly more than one half the size of that of adult Kogia breviceps; cranium less foreshortened than in Kogia; lateral maxillary crests high and with sharp margins, not rounded and inflated, forming nearly straight lateral margins of the supracranial basin; left premaxilla wraps around the posterior side of the left naris and contributes to a sagittal facial crest in the supracranial basin that is less developed than in Kogia; the right margin of the right premaxilla does not form a Kogia-like crest but has a deep fossa; temporal fossa is large; lateral surface of jugal is very slender (Barnes, 1973). |