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Hexanchus (sixgill shark)
Taxonomy
Hexanchus was named by Rafinesque (1810) [Sepkoski's age data: J Sine R Sepkoski's reference number: 884,1066]. It is extant. It is the type genus of Hexanchidae.
It was reranked as Notidanus (Hexanchus) by Herman (1977).
It was assigned to Hexeptranchidae by Arambourg (1927); to Notidanus by Herman (1977); to Hexanchiformes by Sepkoski (2002); and to Hexanchidae by Jordan (1963), Uyeno (1972), Itoigawa (1977), Uyeno et al. (1981), Bendix-Almgreen (1983), Thies (1983), Kumar and Loyal (1987), Müller and Diedrich (1991), Long et al. (1993), Cione and Reguero (1994), Underwood and Mitchell (1999), Purdy et al. (2001), Otero et al. (2013), Guinot et al. (2013), Siversson and Machalski (2017), Kent (2018), Cappetta et al. (2019), Feichtinger et al. (2022) and Feichtinger et al. (2024).
It was reranked as Notidanus (Hexanchus) by Herman (1977).
It was assigned to Hexeptranchidae by Arambourg (1927); to Notidanus by Herman (1977); to Hexanchiformes by Sepkoski (2002); and to Hexanchidae by Jordan (1963), Uyeno (1972), Itoigawa (1977), Uyeno et al. (1981), Bendix-Almgreen (1983), Thies (1983), Kumar and Loyal (1987), Müller and Diedrich (1991), Long et al. (1993), Cione and Reguero (1994), Underwood and Mitchell (1999), Purdy et al. (2001), Otero et al. (2013), Guinot et al. (2013), Siversson and Machalski (2017), Kent (2018), Cappetta et al. (2019), Feichtinger et al. (2022) and Feichtinger et al. (2024).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1810 | Hexanchus Rafinesque |
| 1927 | Hexanchus Arambourg p. 221 |
| 1963 | Hexanchus Jordan p. 597 |
| 1972 | Hexanchus Uyeno p. 223 |
| 1977 | Notidanus (Hexanchus) Herman p. 98 |
| 1977 | Hexanchus Itoigawa p. 125 |
| 1981 | Hexanchus Uyeno et al. pp. 82-83 figs. pl. 1, fg. A-E |
| 1983 | Hexanchus Bendix-Almgreen p. 2 |
| 1983 | Hexanchus Thies p. 18 |
| 1987 | Hexanchus Kumar and Loyal p. 62 |
| 1991 | Hexanchus Müller and Diedrich p. 14 |
| 1993 | Hexanchus Long et al. p. 655 |
| 1994 | Hexanchus Cione and Reguero p. 5 |
| 1999 | Hexanchus Underwood and Mitchell |
| 2001 | Hexanchus Purdy et al. p. 84 |
| 2002 | Hexanchus Sepkoski |
| 2013 | Hexanchus Guinot et al. p. 595 |
| 2013 | Hexanchus Otero et al. p. 21 figs. Fg. 5: 1-6 |
| 2017 | Hexanchus Siversson and Machalski p. 442 |
| 2018 | Hexanchus Kent p. 57 |
| 2019 | Hexanchus Cappetta et al. p. 1130 |
| 2022 | Hexanchus Feichtinger et al. p. 4 |
| 2024 | Hexanchus Feichtinger et al. 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.
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
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: o = order, subp = subphylum | |||||
| References: Wagner 2023, Hendy et al. 2009, Carroll 1988 | |||||
Age range: base of the Pliensbachian to the top of the Early/Lower Pliocene or 190.80000 to 3.60000 Ma
Collections (101 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Pliensbachian | Germany | Hexanchus wiedenrothi (137184) | |
| Aptian | Japan (Iwate) | Hexanchus microdon (210766) | |
| Late/Upper Albian | Poland | Hexanchus sp. (213375) | |
| Cenomanian | Germany (Westphalia) | Hexanchus microdon (210063) | |
| Late/Upper Cretaceous | Japan (Hokkaido) | Hexanchus microdon (161435) | |
| Late/Upper Cenomanian | Lithuania | Notidanus microdon (213719) | |
| Middle Cenomanian | United Kingdom (England) | Hexanchus sp. (213365) | |
| Santonian | Japan | Hexanchus sp. (219963) | |
| Early/Lower Santonian | Japan | Hexanchus sp., Hexanchus microdon (219958) | |
| Late/Upper Santonian | Lebanon | Hexanchus sp., Hexanchus gracilis (92241) | |
| Late/Upper Santonian | United Kingdom (England) | Hexanchus sp. (213377) | |
| Early/Lower Campanian | Germany (Niedersachsen) | Hexanchus gracilis (31992) | |
| Early/Lower Campanian | United Kingdom (England) | Hexanchus sp. (213561) | |
| Early/Lower Campanian | Germany | Hexanchus gracilis (228233) | |
| Late/Upper Campanian | Canada (British Columbia) | Hexanchus microdon (221571 221572) | |
| Late/Upper Campanian | Israel | Hexanchus microdon (35443 35444 214862) | |
| Late/Upper Campanian | Japan (Ehime) | Hexanchus microdon (161436) | |
| Late/Upper Campanian - Early/Lower Maastrichtian | Syria | Hexanchus sp. (117849 117850 117852) | |
| Early/Lower Maastrichtian | Israel | Hexanchus microdon (214864) Hexanchus sp. (214865) | |
| Late/Upper Maastrichtian | New Zealand (South Island) | Hexanchus sp. (106757) | |
| Late/Upper Maastrichtian | Morocco | Hexanchus microdon (99627) | |
| Late/Upper Maastrichtian | Austria | Hexanchus microdon (228232 228907 228908 228909) | |
| Late/Upper Maastrichtian | USA (Texas) | Hexanchus sp. (61738) | |
| Late/Upper Maastrichtian - Early/Lower Paleocene | USA (New Jersey) | Hexanchus sp. (26819) | |
| Early/Lower Paleocene | USA (New Jersey) | Hexanchus sp., Hexanchus microdon (62840) | |
| Danian | Sweden | Hexanchus sp. (90575 90576) | |
| Danian | Morocco | Hexanchus sp. (137838) | |
| Danian | Austria | Hexanchus sp. (233260 233261) | |
| Thanetian | USA (New Jersey) | Hexanchus ensis, Hexanchus primigenius (3113) | |
| Thanetian | USA (California) | Hexanchus microdon (189952) | |
| Ypresian | India (Himachal Pradesh) | Hexanchus sp. (31267) | |
| Ypresian | United Kingdom (England) | Hexanchus agassizi (3260) | |
| Ypresian - Lutetian | Antarctica (Seymour Island) | Hexanchus sp. (149633) | |
| Wasatchian | USA (Virginia) | Hexanchus sp. (15595) | |
| Early/Lower Eocene | Jordan | Hexanchus sp. (65225) | |
| Lutetian | Ukraine | Hexanchus sp. (211009) | |
| Lutetian - Bartonian | Argentina (Santa Cruz) | Hexanchus agassizi (230269 230272 230273) | |
| Lutetian - Bartonian | Antarctica (Seymour Island) | Hexanchus sp. (53666) | |
| Middle Eocene | Ukraine (Crimea) | Hexanchus sp. (140018) | |
| Bartonian | Spain | Hexanchus agassizi (141924) | |
| Priabonian | Egypt | Hexanchus agassizi (96952) Hexanchus sp. (137547 137550 137551 137554 137564 137568 137569) | |
| Priabonian | Jordan | Hexanchus sp. (32899) | |
| Early/Lower Oligocene | Japan (Fukushima) | Hexanchus sp. (161439) | |
| Early/Lower Oligocene | Japan (Fukuoka) | Hexanchus sp. (161440) | |
| Rupelian | Netherlands | Hexanchus primigenius (87250) | |
| Chattian | Australia (South Australia) | Hexanchus agassizi (45792) | |
| Chattian | USA (California) | Hexanchus aus, Hexanchus bus (11601) | |
| Chattian | New Zealand (South Otago) | Notidanus gigas (45653) | |
| Miocene | Japan (Saitama) | Hexanchus sp. (161441) | |
| Miocene | Japan (Hiroshima) | Hexanchus sp. (161447) | |
| Burdigalian | Malta (Bahrija) | Hexanchus griseus (161386) | |
| Langhian | Netherlands | Hexanchus primigenius (45505) | |
| Langhian | USA (California) | Hexanchus sp. (59059) | |
| Middle Miocene | Japan (Shimane) | Hexanchus serratissimus (52017) | |
| Middle Miocene | Japan (Hokuriku) | Hexanchus gigas (161492 161495 161496) | |
| Middle Miocene | India (Orissa) | Hexanchus sp. (46365) | |
| Middle Miocene | Japan (Gifu) | Hexanchus sp. (161445) | |
| Middle Miocene - Late/Upper Miocene | Chile (Huasco) | Hexanchus sp. (223680) | |
| Serravallian | France (Gironde) | Hexanchus nakamurai (161524 161527) | |
| Serravallian - Tortonian | Malta (Ras ii-Karraba) | Hexanchus griseus (161384) | |
| Badenian | Slovakia (Bratislava) | Hexanchus primigenius, Hexanchus gigas (161996) | |
| Badenian | Poland | Hexanchus primigenius (162017) | |
| Tortonian | USA (California) | Hexanchus sp. (13300) | |
| Tortonian | Germany | Hexanchus primigenius (162719) | |
| Tortonian | Denmark | Hexanchus primigenus (98312) | |
| Tortonian - Messinian | Peru | Hexanchus gigas (46083) | |
| Tortonian - Piacenzian | USA (California) | Hexanchus griseus (188305) | |
| Late/Upper Miocene | Portugal | Hexanchus grlseus (56459) | |
| Late/Upper Miocene | Netherlands (Noord-Brabant) | Hexanchus griseus (162679) | |
| Late/Upper Miocene | Costa Rica (Limon) | Hexanchus sp. (162678) | |
| Late/Upper Miocene | Netherlands | Hexanchus primigenius, Hexanchus gigas (53889) | |
| Late/Upper Miocene | Chile (Antwerpen) | Hexanchus griseus (154114) | |
| Late/Upper Miocene - Early/Lower Pliocene | Argentina (Rio Negro) | Hexanchus griseus (162669) | |
| Messinian | Algeria | Hexanchus gigas (186631) | |
| Messinian | USA (California) | Hexanchus sp. (117470) | |
| Messinian - Zanclean | Mexico (Baja) | Hexanchus griseus (154117) | |
| Zanclean | USA (North Carolina) | Hexanchus sp. (52582) | |
| Zanclean | Italy | Hexanchus griseus (204946) |