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| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Pseudoscapanorhynchidae
Taxonomy
Pseudoscapanorhynchidae was named by Herman (1979).
It was assigned to Lamniformes by Nelson et al. (2016), Shimada and Everhart (2019).
It was assigned to Lamniformes by Nelson et al. (2016), Shimada and Everhart (2019).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 1979 | Pseudoscapanorhynchidae Herman p. 361 |
| 2016 | Pseudoscapanorhynchidae Nelson et al. p. 64 |
| 2019 | Pseudoscapanorhynchidae Shimada and Everhart p. 4 |
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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. †Pseudoscapanorhynchidae Herman 1979
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G. †Cretodus Sokolov 1965
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†Cretodus houghtonorum Shimada and Everhart 2019
†Cretodus longiplicatus Werner 1989
†Cretodus semiplicatus Agassiz 1843
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Invalid names: Otodus crassus Woodward 1888 [synonym], Otodus divaricatus Leidy 1872 [synonym], Otodus michoni Coquand 1860 [synonym], Otodus sulcatus Geinitz 1843 [synonym], Scyllium rugosum Williston 1900 [synonym]
G. †Protolamna Cappetta 1980
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†Protolamna borodini Cappetta and Case 1975
†Protolamna carteri Cappetta and Case 1999
†Protolamna gigantea Case 2001
†Protolamna ricaurtei Carrillo-Briceño et al. 2019
†Protolamna roanokeensis Cappetta and Case 1999
†Protolamna sarstedtensis Schmitz et al. 2010
†Protolamna sokolovi Cappetta 1980
G. †Pseudoscapanorhynchus Herman 1977
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†Pseudoscapanorhynchus compressidens Herman 1977
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Invalid names: Protolamna acuta Müller and Diedrich 1991 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| K. Shimada and M. J. Everhart 2019 | Teeth consisting of triangular principal cusp with one or two pairs of small triangular lateral cusplets and bilobed root; mesial and distal cutting edges of principal cusp and lateral cusplets smooth and unserrated; lingual face of principal cusp robust and very convex; labial face of princi- pal cusp nearly flat or weakly convex; lateral cusplets well demarcated from principal cusp but connected on labial side with basally extended crown base on both root lobes; overall crown base on labial side slightly overhanging root and either sharply ‘V’-shaped or gently concave; either or both labial and lingual sides of crown base margin tend to be ornamented with multiple vertical ridges; modest tooth neck present on lingual side; bilobed root with robust lingual protuberance showing one or multiple minute nutritive pores with or without shallow nutritive groove; basal root concavity ‘U’- or ‘V’-shaped; root lobe apices rounded and directed basally or slightly diverged.
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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 Late/Upper Valanginian to the top of the Early/Lower Maastrichtian or 137.05000 to 66.00000 Ma
Collections (149 total)
Oldest occurrences | |||
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Valanginian | Poland (Lodzkie) | Protolamna sp. (64836) | |
| Late/Upper Valanginian | Poland | Protolamna sp. (213519) | |
| Barremian | Japan (Gunma) | Protolamna sp. (229065) | |
| Early/Lower Barremian | Germany | Protolamna sarstedtensis (241486) | |
| Early/Lower Barremian | Spain (Teruel) | Protolamna sokolovi (36365 91420 214376) | |
| Barremian - Albian | Tunisia (Medinine) | Protolamna sp., Selachii indet. (166013) | |
| Early/Lower Aptian | United Kingdom (England) | Protolamna sokolovi (241457) | |
| Aptian | USA (Texas) | Lamna sulcata (99154) | |
| Late/Upper Aptian | France | Odontaspis macrorhiza (214869) | |
| Late/Upper Aptian | United Kingdom (England) | Protolamna sarstedtensis (241464) | |
Youngest occurrences |
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| Time interval | Ma | Country or state | PBDB collection number |
| Late/Upper Campanian | Israel | Cretodus sp. (214862) | |
| Late/Upper Campanian | USA (New Mexico) | Cretodus sp. (14472) | |
| Late/Upper Campanian | France | Protolamna borodini (61351) | |
| Late/Upper Campanian | USA (South Carolina) | Cretodus borodini (79363) | |
| Middle Campanian | USA (North Carolina) | Protolamna borodini (128412) | |
| Middle Campanian | France | Protolamna borodini (61352 61353) | |
| Middle Campanian - Late/Upper Campanian | USA (Montana) | Protolamna sokolovi (177498) | |
| Middle Campanian - Late/Upper Campanian | USA (Delaware) | Plicatolamna borodini (126600) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | USA (New Jersey) | Plicatolamna borodini (14504) | |
| Early/Lower Maastrichtian | USA (New Jersey) | Plicatolamna borodini (213744 213745 213746 213747) | |