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Hexanchiformes
Taxonomy
Hexanchiformes was named by de Buen (1926). It is extant.
It was assigned to Elasmobranchii by Cvancara and Hoganson (1993); to Chondrichthyes by Purdy et al. (2001) and Sepkoski (2002); to Neoselachii by Rees (2000) and Underwood (2006); to Squalea by Underwood and Ward (2004) and Carnevale (2007); to Squalimorphi by Long (2011); to Elasmobranchii by Long et al. (1993), Cione and Reguero (1994) and Bogan et al. (2016); to Hexanchida by Nelson et al. (2016); to Selachimorpha by Kent (2018); and to Squalomorphii by Thies (1983), Cahuzac et al. (2007) and Stumpf and Kriwet (2019).
It was assigned to Elasmobranchii by Cvancara and Hoganson (1993); to Chondrichthyes by Purdy et al. (2001) and Sepkoski (2002); to Neoselachii by Rees (2000) and Underwood (2006); to Squalea by Underwood and Ward (2004) and Carnevale (2007); to Squalimorphi by Long (2011); to Elasmobranchii by Long et al. (1993), Cione and Reguero (1994) and Bogan et al. (2016); to Hexanchida by Nelson et al. (2016); to Selachimorpha by Kent (2018); and to Squalomorphii by Thies (1983), Cahuzac et al. (2007) and Stumpf and Kriwet (2019).
Synonymy list
| Year | Name and author |
|---|---|
| 1926 | Hexanchiformes de Buen |
| 1983 | Hexanchiformes Thies p. 11 |
| 1993 | Hexanchiformes Cvancara and Hoganson p. 3 |
| 1993 | Hexanchiformes Long et al. p. 655 |
| 1994 | Hexanchiformes Cione and Reguero p. 5 |
| 2000 | Hexanchiformes Rees p. 412 |
| 2001 | Hexanchiformes Purdy et al. p. 82 |
| 2002 | Hexanchiformes Sepkoski |
| 2004 | Hexanchiformes Underwood and Ward p. 474 |
| 2006 | Hexanchiformes Underwood p. 233 |
| 2007 | Hexanchiformes Cahuzac et al. p. 12 |
| 2007 | Hexanchiformes Carnevale p. 6 |
| 2011 | Hexanchiformes Long p. 242 |
| 2016 | Hexanchiformes Bogan et al. |
| 2016 | Hexanchiformes Nelson et al. p. 73 |
| 2018 | Hexanchiformes Kent p. 55 |
| 2019 | Hexanchiformes Stumpf and Kriwet p. 648 |
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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. Hexanchiformes de Buen 1926
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G. Chlamydoselachus Garman 1884
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†Chlamydoselachus balli Cappetta et al. 2019
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Invalid names: Glyphis subulata Gibbes 1847 [synonym]
G. †Rolfodon Cappetta et al. 2019
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†Rolfodon bracheri Pfeil 1983
†Rolfodon goliath Antunes and Cappetta 2002
†Rolfodon keyesi Mannering and Hiller 2008
†Rolfodon landinii Carillo-Briceño et al. 2014
†Rolfodon ludvigseni Cappetta et al. 2019
†Rolfodon tatere Consoli 2008
†Rolfodon thomsoni Richter and Ward 1990
Fm. †Crassonotidae Kriwet and Klug 2012
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G. †Eonotidanus Pfeil 1893
Fm. Hexanchidae Gray 1851 [cow shark]
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G. †Gladioserratus Underwood et al. 2011
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†Gladioserratus aptiensis Pictet 1865
†Gladioserratus dentatus Guinot et al. 2014
†Gladioserratus magnus Underwood et al. 2011
G. Heptranchias Rafinesque 1810 [sevengill shark]
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†Heptranchias andersoni Jordan 1907
†Heptranchias cinereus Gmelin 1789
†Heptranchias ezoensis Applegate and Uyeno 1968
†Heptranchias howellii Reed 1946
Heptranchias perlo Bonnaterre 1788
G. Hexanchus Rafinesque 1810 [sixgill shark]
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†Hexanchus agassizi Cappetta 1976
†Hexanchus gigas Sismonda 1857
†Hexanchus gracilis Davis 1887
†Hexanchus microdon Agassiz 1835
†Hexanchus wiedenrothi Thies 1983
G. †Monopterhinus Blainville 1816
G. †Notidanion Jordan 1923
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†Notidanion boreale Jordan and Hanibal 1923
†Notidanion chiconis Jordan 1907
G. †Notidanodon Cappetta 1975
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†Notidanodon dentatus Woodward 1886
†Notidanodon lanceolatus Woodward 1886
†Notidanodon pectinatus Agassiz 1843
G. Notidanus Cuvier 1817
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†Notidanus gracilis Davis 1887
†Notidanus jenningsi Chapman and Pritchard 1904
†Notidanus loozi Vincent 1876
†Notidanus marginalis Davis 1888
†Notidanus munsteri Agassiz 1843
†Notidanus recurvus Agassiz 1843
†Notidanus serratus Fraas 1855
†Notidanus tenuidens Leriche 1938
†Notidanus ultra Ameghino 1901
G. Notorhynchus Ayres 1855 [sevengill shark]
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†Notorhynchus primigenius Agassiz 1835
†Notorhynchus serratissimus Agassiz 1843
G. Notorynchus Ayers 1855
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Notorynchus maculatus Ayers 1855
†Notorynchus thevenardi Delfortrie 1878
Subor. †Hexanchoidei Hay 1902
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Fm. †Komoksodontidae Cappetta et al. 2019
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G. †Paraheptranchias
G. †Paranotidanus Ward and Thies 1987
Fm. †Pseudonotidanidae Underwood and Ward 2004
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G. †Pseudonotidanus Underwood and Ward 2004
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†Pseudonotidanus politus Thies 1992
†Pseudonotidanus semirugosus Underwood and Ward 2004
†Pseudonotidanus terencei Delsate and Godefroit 1995
G. †Weltonia
Invalid names: Heptranchidae Barnard 1925 [empty]
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
Maximum range based only on fossils: base of the Wordian to the top of the Late/Upper Pleistocene or 266.90000 to 0.01170 Ma
Minimum age of oldest fossil (stem group age): 264.28 Ma
Minimum age of oldest fossil (stem group age): 264.28 Ma
Collections (299 total)
Oldest occurrences | |||
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wordian | Japan | Hexanchidae indet. (133500) | |
| Pliensbachian | Germany | Hexanchus wiedenrothi (137184) | |
| Late/Upper Pliensbachian | Sweden (Scania) | Hexanchidae indet. (90692) | |
| Margaritatus | France | Hexanchidae indet. (149432) | |
| Spinatum | France (Ardennes) | Hexanchidae indet. (149428) | |
| Spinatum | Germany (Mecklenburg-Vorpommern) | Notidanoides sp. (189042 206457) | |
| Early/Lower Toarcian | Germany | Palaeospinax politus (139237) | |
| Toarcian | Belgium | Welcommia terencei (141632) | |
| Early/Lower Bajocian | France (Grand Est) | Pseudonotidanus sp. (179498) | |
| Bathonian | United Kingdom (England) | Paranotidanus sp., Pseudonotidanus semirugosus (91450) | |
| Late/Upper Bathonian | United Kingdom (England) | Pseudonotidanus semirugosus (91455) | |
| Late/Upper Callovian | Poland | Hexanchidae indet., Notidanoides sp. (117993) | |
| Middle Callovian | Poland | Notidanoides sp. (97035) | |
| Kimmeridgian | Germany | Notidanus munsteri (131889) | |
| Late/Upper Kimmeridgian | Germany (Baden-Württemberg) | Notidanoides muensteri, Notidanoides serratus (154138) | |
| Cretaceous | New Zealand (South Island) | Notidanus sp. (204190) | |
| Early/Lower Valanginian | France (Gard) | Pachyhexanchus pockrandti, Gladioserratus dentatus, Welcommia bodeuri (213631) | |
| Valanginian | France | Welcommia bodeuri (214859) | |
| Late/Upper Hauterivian | United Kingdom (England) | Notidanodon lanceolatus (66420) Notorhynchus aptiensis (66418) | |
| Hauterivian | France | Pachyhexanchus pockrandti (214860) | |