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Selachii (shark)
Taxonomy
Selachii was named as a subclass. It is extant.
It was reranked as the suborder Selachii by Gadow (1898); it was reranked as the order Selacha by Hay (1902); it was reranked as the order Selachii by Case (1904), Eastman (1904), Andrews (1906), Jaekel (1911), Fedorowski (1912), Woodward (1916), Gunnell (1933), Säve-Söderbergh (1934), Sykes (1971), Herman (1977), Case (1978), Case (1979), Thurmond and Jones (1981), Kumar and Loyal (1987), Case and Schwimmer (1988); it was reranked as the class Selachii by Applegate (1970); it was reranked as the unranked clade Selachii by Jordan (1963), Long (2011), Nelson et al. (2016), Ebersole et al. (2019), Ebersole et al. (2024), Cicimurri et al. (2025).
It was assigned to Plagiostomi by Gadow (1898); to Euselachii by Hay (1902); to Placoidea by Jaekel (1911); to Plagiostomi by Gunnell (1933); to Vertebrata by Applegate (1970); to Chondrichthyes by Sykes (1971); to Hybodontiformes by Herman (1977), Case (1978), Case (1979); to Elasmobranchii by Case (1904), Eastman (1904), Andrews (1906), Fedorowski (1912), Woodward (1916), Thurmond and Jones (1981), Kumar and Loyal (1987), Case and Schwimmer (1988); to Neoselachii by Long (2011); to Elasmobranchii by Säve-Söderbergh (1934), Jordan (1963), Ebersole et al. (2019); and to Elasmobranchii by Nelson et al. (2016), Ebersole et al. (2024), Cicimurri et al. (2025).
It was reranked as the suborder Selachii by Gadow (1898); it was reranked as the order Selacha by Hay (1902); it was reranked as the order Selachii by Case (1904), Eastman (1904), Andrews (1906), Jaekel (1911), Fedorowski (1912), Woodward (1916), Gunnell (1933), Säve-Söderbergh (1934), Sykes (1971), Herman (1977), Case (1978), Case (1979), Thurmond and Jones (1981), Kumar and Loyal (1987), Case and Schwimmer (1988); it was reranked as the class Selachii by Applegate (1970); it was reranked as the unranked clade Selachii by Jordan (1963), Long (2011), Nelson et al. (2016), Ebersole et al. (2019), Ebersole et al. (2024), Cicimurri et al. (2025).
It was assigned to Plagiostomi by Gadow (1898); to Euselachii by Hay (1902); to Placoidea by Jaekel (1911); to Plagiostomi by Gunnell (1933); to Vertebrata by Applegate (1970); to Chondrichthyes by Sykes (1971); to Hybodontiformes by Herman (1977), Case (1978), Case (1979); to Elasmobranchii by Case (1904), Eastman (1904), Andrews (1906), Fedorowski (1912), Woodward (1916), Thurmond and Jones (1981), Kumar and Loyal (1987), Case and Schwimmer (1988); to Neoselachii by Long (2011); to Elasmobranchii by Säve-Söderbergh (1934), Jordan (1963), Ebersole et al. (2019); and to Elasmobranchii by Nelson et al. (2016), Ebersole et al. (2024), Cicimurri et al. (2025).
Synonymy list
| Year | Name and author |
|---|---|
| 1898 | Selachii Gadow p. 5 |
| 1902 | Selacha Hay p. 274 |
| 1904 | Selachii Case p. 74 |
| 1904 | Selachii Eastman p. 71 |
| 1906 | Selachii Andrews p. 317 |
| 1911 | Selachii Jaekel p. 55 |
| 1912 | Selachii Fedorowski p. 55 |
| 1916 | Selachii Woodward p. 3 |
| 1933 | Selachii Gunnell |
| 1934 | Selachii Säve-Söderbergh p. 17 |
| 1963 | Selachii Jordan p. 590 |
| 1970 | Selachii Applegate p. 393 |
| 1971 | Selachii Sykes p. 13 |
| 1977 | Selachii Herman p. 17 |
| 1978 | Selachii Case p. 180 |
| 1979 | Selachii Case p. 79 |
| 1981 | Selachii Thurmond and Jones p. 39 |
| 1987 | Selachii Kumar and Loyal p. 62 |
| 1988 | Selachii Case and Schwimmer p. 291 |
| 2011 | Selachii Long p. 242 |
| 2016 | Selachii Nelson et al. p. 58 |
| 2019 | Selachii Ebersole et al. p. 15 |
| 2024 | Selachii Ebersole et al. p. 4 |
| 2025 | Selachii Cicimurri et al. p. 8 |
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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.
Or. †Pleuropterygii
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Or. †Polyspondyli Jordan 1963
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Or. †Ichthyotomi Cope
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Fm. †Cladodontidae
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G. †Bathycheilodus St John and Worthen 1875
G. †Hybocladodus
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†Hybocladodus compressus Newberry and Worthen 1866
†Hybocladodus intermedius Saint John and Worthen 1875
†Hybocladodus nitidus Saint John and Worthen 1875
†Hybocladodus plicatilis Saint John and Worthen 1875
†Hybocladodus tenuicostatus Saint John and Worthen 1875
G. †Lambdodus
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†Lambdodus calceolus Saint John and Worthen 1875
†Lambdodus costatus Saint John and Worthen 1875
†Lambdodus hamulus Saint John and Worthen 1875
†Lambdodus reflexus Saint John and Worthen 1875
†Lambdodus transversus Saint John and Worthen 1875
G. †Pternodus Garman 1885
Invalid names: Pleuracanthides Haeckel 1895 [empty]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
No ecological data are available
Age range: base of the Asbian to the top of the Maastrichtian or 339.90000 to 66.00000 Ma
Collections (3 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Asbian | United Kingdom (Scotland) | Cladodontidae indet. (230473) | |
| Campanian | USA (North Carolina) | Selachii indet. (7622) | |
| Maastrichtian | Portugal (Coimbra) | Selachii indet. (49276) |