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Eoptolamnidae
Taxonomy
Eoptolamnidae was named by Kriwet et al. (2008).
It was assigned to Lamniformes by Kriwet et al. (2008).
It was assigned to Lamniformes by Kriwet et al. (2008).
Synonymy list
Year | Name and author |
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2008 | Eoptolamnidae 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.
Fm. †Eoptolamnidae Kriwet et al. 2008
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G. †Eoptolamna Kriwet et al. 2008
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†Eoptolamna eccentrolopha Kriwet et al. 2008
†Eoptolamna supracretacea Guinot et al. 2013
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
Reference | Diagnosis | |
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J. Kriwet et al. 2008 | Lamniform sharks only known by isolated teeth and characterized by the following combination of characters: tearing-type dentition with very weak gradient monognathic heterodonty; a single pair of parasymphyseals(?) present; mesiodistally compressed teeth, with generally a single pair of lateral cusplets; robust roots with short branches; lingual protuberance more or less massive; with nutritive groove, which might be secondarily closed. |
Measurements
No measurements are available
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Source: o = order, subp = subphylum | |||||
References: Hendy et al. 2009, Carroll 1988, Wagner 2023 |
Age range: base of the Early/Lower Barremian to the top of the Early/Lower Campanian or 130.00000 to 70.60000 Ma
Collections (43 total)
Time interval | Ma | Country or state | Original ID and collection number |
---|---|---|---|
Early/Lower Barremian | Spain (Aragón) | Protolamna sokolovi (28196) | |
Aptian | Japan (Iwate) | Plicatolamna macrorhiza (210764 210765) | |
Late/Upper Aptian - Early/Lower Albian | USA (Texas) | Leptostyrax bicuspidatus (14375) | |
Albian | USA (Texas) | Leptostyrax bicuspidatus (27604 27606 27613) | |
Albian | Australia (Western Australia) | Leptostyrax sp. (90688) | |
Early/Lower Albian | USA (Texas) | Leptostyrax sp. (27774) | |
Late/Upper Albian | USA (Texas) | Leptostyrax macrorhiza (52126 213302 213307) | |
Late/Upper Albian | Lithuania | Odontaspis macrorhiza (213709 213710 213717) | |
Late/Upper Albian | United Kingdom (England) | Leptostyrax sp. (213347 213354) | |
Cenomanian | Australia (Western Australia) | Leptostyrax sp. (215794) | |
Late/Upper Cretaceous | Japan (Hokkaido) | Plicatolamna macrorhiza (161435) | |
Late/Upper Cenomanian | Lithuania | Odontaspis macrorhiza (90732 213719 213720 213721) | |
Middle Cenomanian | Russian Federation (Volgograd) | Megarhizodon macrorhiza (92399) | |
Turonian | USA (Kansas) | Leptostyrax crassidens (102879) | |
Turonian | USA (South Dakota) | Leptostyrax compressidens (181902) | |
Early/Lower Santonian - Middle Santonian | USA (New Mexico) | Eoptolamnidae indet. (52037) | |
Late/Upper Santonian | France (Aisne) | Eoptolamna supracretacea (213563) | |
Late/Upper Santonian | United Kingdom (England) | Eoptolamna supracretacea (213377 213381) | |
Middle Santonian | United Kingdom (England) | Eoptolamna supracretacea (213376) | |
Early/Lower Campanian | Sweden (Skåne) | Leptostyrax sp. (74335) | |
Early/Lower Campanian | France (Somme) | Eoptolamna supracretacea (213565 213566) | |
Early/Lower Campanian | Lithuania | Odontaspis macrorhiza (90731 213722) | |
Early/Lower Campanian | France (Ardennes) | Eoptolamna supracretacea (157587) | |
Early/Lower Campanian | United Kingdom (England) | Eoptolamna supracretacea (213378 213379 213382 213561) | |
Early/Lower Campanian | France (Aisne) | Eoptolamna supracretacea (213559 213560) |