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Leptostyrax
Taxonomy
Leptostyrax was named by Williston (1900) [Sepkoski's age data: K Albi K Coni Sepkoski's reference number: 884]. It is not extant. Its type is Leptostyrax bicuspidatus.
It was assigned to Lamninae by Hay (1902); to Lamnidae by Jordan (1963); to Cretoxyrhinidae by Siverson (1992), Siverson (1996), Siverson (1997), Underwood and Mitchell (1999), Cappetta and Case (1999); to Lamniformes by Sepkoski (2002); and to Eoptolamnidae by Kriwet et al. (2008).
It was assigned to Lamninae by Hay (1902); to Lamnidae by Jordan (1963); to Cretoxyrhinidae by Siverson (1992), Siverson (1996), Siverson (1997), Underwood and Mitchell (1999), Cappetta and Case (1999); to Lamniformes by Sepkoski (2002); and to Eoptolamnidae by Kriwet et al. (2008).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1900 | Leptostyrax Williston |
| 1902 | Leptostyrax Hay p. 304 |
| 1963 | Leptostyrax Jordan p. 599 |
| 1978 | Megarhizodon Sokolov |
| 1992 | Leptostyrax Siverson p. 535 |
| 1996 | Leptostyrax Siverson p. 824 |
| 1997 | Leptostyrax Siverson p. 460 |
| 1999 | Leptostyrax Cappetta and Case p. 24 |
| 1999 | Leptostyrax Underwood and Mitchell |
| 2002 | Leptostyrax Sepkoski |
| 2008 | Leptostyrax Kriwet et al. p. 280 |
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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. †Leptostyrax Williston 1900
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†Leptostyrax macrorhiza Cope 1875
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Invalid names: Leptostyrax bicuspidatus Williston 1900 [synonym]
Invalid names: Megarhizodon Sokolov 1978 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, subp = subphylum | |||||
| References: Carroll 1988, Wagner 2023, Hendy et al. 2009 | |||||
Age range: base of the Early/Lower Aptian to the top of the Early/Lower Campanian or 121.40000 to 72.20000 Ma
Collections (37 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Aptian | India | L. sp. (239333) | |
| Aptian | Japan (Iwate) | Plicatolamna macrorhiza (210764 210765) | |
| Late/Upper Aptian - Early/Lower Albian | USA (Texas) | L. bicuspidatus (14375) | |
| Early/Lower Albian | France (Marne) | L. macrorhiza (235560) | |
| Early/Lower Albian | USA (Texas) | L. sp. (27774) | |
| Albian | Australia (Western Australia) | L. sp. (90688) | |
| Albian | USA (Texas) | L. bicuspidatus (27604 27606 27613) | |
| Middle Albian | France (Haute-Marne) | L. macrorhiza (235569) | |
| Middle Albian | France (Marne) | L. macrorhiza (169108 235563 235564 235565 235567) | |
| Late/Upper Albian | USA (Texas) | L. macrorhiza (52126 213302 213307) | |
| Late/Upper Albian | Lithuania | Odontaspis macrorhiza (213709 213710 213717) | |
| Late/Upper Albian | United Kingdom (England) | L. sp. (213347 213354) | |
| Cenomanian | Australia (Western Australia) | L. sp. (215794) | |
| Early/Lower Cenomanian | Russian Federation (Moscow) | L. sp. (138814) | |
| Late/Upper Cenomanian | Lithuania | Odontaspis macrorhiza (90732 213719 213720 213721) | |
| Middle Cenomanian | Russian Federation (Volgograd) | Megarhizodon macrorhiza (92399) | |
| Late/Upper Cretaceous | Japan (Hokkaido) | Plicatolamna macrorhiza (161435) | |
| Turonian | USA (South Dakota) | L. compressidens (181902) | |
| Turonian | USA (Kansas) | L. crassidens (102879) | |
| Early/Lower Campanian | Lithuania | Odontaspis macrorhiza (90731 213722) | |
| Early/Lower Campanian | Sweden (Skåne) | L. sp. (74335) |