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Xiphactinus
Taxonomy
Xiphactinus was named by Leidy (1870) [Sepkoski's age data: K Albi K Camp Sepkoski's reference number: 915]. It is not extant.
It was synonymized subjectively with Portheus by Hay (1902).
It was assigned to Siluridae by Leidy (1873); to Chirocentridae by Case and Schwimmer (1988); to Pachycormiformes by Sepkoski (2002); and to Ichthyodectidae by Applegate (1970), Thurmond and Jones (1981), Schwimmer et al. (1997), Shimada (2006), Shimada et al. (2006), Cavin et al. (2013), Bice and Shimada (2016) and Hoganson et al. (2019).
It was synonymized subjectively with Portheus by Hay (1902).
It was assigned to Siluridae by Leidy (1873); to Chirocentridae by Case and Schwimmer (1988); to Pachycormiformes by Sepkoski (2002); and to Ichthyodectidae by Applegate (1970), Thurmond and Jones (1981), Schwimmer et al. (1997), Shimada (2006), Shimada et al. (2006), Cavin et al. (2013), Bice and Shimada (2016) and Hoganson et al. (2019).
Synonymy list
| Year | Name and author |
|---|---|
| 1870 | Xiphactinus Leidy |
| 1873 | Xiphactinus Leidy p. 290 |
| 1970 | Xiphactinus Applegate p. 418 |
| 1981 | Xiphactinus Thurmond and Jones p. 97 |
| 1988 | Xiphactinus Case and Schwimmer p. 300 |
| 1997 | Xiphactinus Schwimmer et al. p. 611 |
| 2002 | Xiphactinus Sepkoski |
| 2006 | Xiphactinus Shimada p. 169 |
| 2006 | Xiphactinus Shimada et al. p. 23 |
| 2013 | Xiphactinus Cavin et al. p. 170 |
| 2016 | Xiphactinus Bice and Shimada p. 186 |
| 2019 | Xiphactinus Hoganson et al. p. 53 |
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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.
G. †Xiphactinus Leidy 1870
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†Xiphactinus audax Leidy 1870
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Invalid names: Portheus lestrio Cope 1873 [synonym], Portheus lowii Stewart 1898 [synonym], Portheus molossus Cope 1871 [synonym], Portheus mudgei Cope 1874 [synonym], Saurocephalus thaumas Cope 1870 [synonym], Xiphactinus brachygnathus Stewart 1898 [synonym]
†Xiphactinus vetus Leidy 1856
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Invalid names: Polygonodon rectus Leidy 1858 [synonym], Portheus angulatus Cope 1872 [synonym]
Diagnosis
No diagnoses are available