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Ischnacanthiformes
Taxonomy
Ischnacanthiformes was named by Berg (1940). It is not extant.
It was assigned to Acanthodii by Dineley and Metcalf (1999), Burrow (2011), Long (2011); to Acanthodii by Nelson et al. (2016); and to Acanthodii by Burrow and Elliott (2023).
It was assigned to Acanthodii by Dineley and Metcalf (1999), Burrow (2011), Long (2011); to Acanthodii by Nelson et al. (2016); and to Acanthodii by Burrow and Elliott (2023).
Synonymy list
| Year | Name and author |
|---|---|
| 1940 | Ischnacanthiformes Berg |
| 1999 | Ischnacanthiformes Dineley and Metcalf p. 11 |
| 2011 | Ischnacanthiformes Burrow p. 1331 |
| 2011 | Ischnacanthiformes Long p. 242 |
| 2016 | Ischnacanthiformes Nelson et al. p. 100 |
| 2023 | Ischnacanthiformes Burrow and Elliott p. 3 |
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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. †Ischnacanthiformes Berg 1940
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Fm. †Acritolepidae Valiukevicius and Burrow 2005
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G. †Acritolepis Valiukevicius 2003
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†Acritolepis urvantsevi Valiukevicius 2003
†Acritolepis ushakovi Valiukevicius 2003
Fm. †Ischnacanthidae Woodward 1891
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G. †Acanthodopsis Hancock and Atthey 1868
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†Acanthodopsis acuta Wellburn 1902
†Acanthodopsis microdon Traquair 1894
†Acanthodopsis russelli Burrow 2004
†Acanthodopsis summiti Wellburn 1902
†Acanthodopsis wardi Hancock and Atthey 1868
G. †Apateacanthus Woodward 1891
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†Apateacanthus dentatus Hussakof and Bryant 1919
†Apateacanthus peculiaris Hussakof 1913
†Apateacanthus vetustus Clarke 1885
G. †Ictinocephalus Page 1859
G. †Ischnacanthus Powrie 1864
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†Ischnacanthus anglicus White 1961
†Ischnacanthus gracilis Egerton 1861
†Ischnacanthus kingi White 1961
†Ischnacanthus scheii Spjeldnaes 1967
†Ischnacanthus wickhami White 1961
G. †Podoliacanthus Voichyshyn and Szaniawski 2012
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†Podoliacanthus zychi Voichyshyn and Szaniawski 2012
Fm. †Poracanthodidae
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Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: c = class, subp = subphylum | |||||
| References: Aberhan et al. 2004, Carroll 1988 | |||||
Age range: base of the Ludfordian to the top of the Moscovian or 425.00000 to 307.00000 Ma
Collections (57 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Wenlock - Ludlow | Greenland | Gomphonchus sandelensis (239394) | |
| Ludlow | Australia (Queensland) | Gomphonchus turnerae (232518) | |
| Ludlow | China (Yunnan) | Gomphonchus sp. (27796) | |
| Ludfordian | Lithuania | Rohonilepis breviornatus (192569 192666) | |
| Ludfordian | United Kingdom (England) | Ischnacanthus kingi (8314 8320) | |
| Ludfordian | China (Junnan) | Gomphonchus sp. (182558) | |
| Kaugetuma | Estonia | Gomphonchus sandelensis (195606) | |
| Pridoli | China (Sichuan) | Ischnacanthidae indet., Gomphonchus sandelensis (182549) | |
| Pridoli | Canada (New Brunswick) | Nerepisacanthus denisoni (161317) | |
| Pridoli | Lithuania | Rohonilepis breviornatus (192553 192568 192586 192652 238159 238160 238161 238162) | |
| Pridoli | China (Gansu) | Gomphonchus sandelensis (182526) | |
| Ohesaare | Estonia (Saare) | Gomphonchus sandelensis, Gomphonchus hoppei (193837) | |
| Early/Lower Lochkovian | United Kingdom | Ischnacanthidae indet. (238749 238795) Ischnacanthiformes indet. (238750) | |
| Lochkovian | Russian Federation | Acanthopora transitans, Acanthospina irregulare, Acritolepis ushakovi, Acritolepis urvantsevi (90329) Arcticacanthus bicostatus (90330) | |
| Lochkovian | United Kingdom (Scotland) | Ischnacanthus gracilis (195122 195123) Ischnacanthus gracilis, Uraniacanthus sp., Uraniacanthus curtus (155918) Ischnacanthus sp. (26908) | |
| Lochkovian | Canada (Nunavut) | Gomphonchus sandelensis, Gomphonchus hoppei (238568) Ischnacanthus sp. (90322) | |
| Lochkovian | Greenland | Gomphonchus sandelensis (239395) | |
| Lochkovian | Norway | Gomphonchus sp. (237822) | |
| Lochkovian | United Kingdom (Herefordshire) | Uraniacanthus spinosus (201736) | |
| Lochkovian | Ukraine | Ischnacanthiformes indet., Podoliacanthus sp. (238207) | |
| Lochkovian - Pragian | Ukraine | Ischnacanthiformes indet., Podoliacanthus sp., Podoliacanthus zychi (23447) | |
| Early/Lower Devonian | Bolivia | Gomphonchus pluriformis (25592) | |
| Early/Lower Devonian | United Kingdom (Scotland) | Ischnacanthus gracilis, Uraniacanthus curtus (181899) | |
| Early/Lower Devonian | USA (Nevada) | Gomphonchus sp. (216494 216495) | |
| Early/Lower Devonian | United Kingdom | Uraniacanthus curtus (238045) | |
| Emsian | New Zealand | Gomphonchus sp. (40524) | |
| Emsian | USA (Utah) | Cacheacanthus utahensis (233171 238197 238198) Ischnacanthus sp. (238200) | |
| Late/Upper Emsian | USA (California) | Ischnacanthiformes indet. (206449) | |
| Eifelian | Australia (South Australia) | Gomphonchus sp. (239524) | |
| Eifelian | Iran | Ischnacanthiformes indet. (239496) | |
| Givetian | Svalbard and Jan Mayen (Spitsbergen) | Serradentus armstrongi (225592) | |
| Givetian | Antarctica | Acritolepidae indet. (207098) | |
| Early/Lower Frasnian | Iran | Ischnacanthidae indet. (226048) | |
| Famennian | Afghanistan (Kabul) | Ischnacanthiformes indet. (232508) | |
| Holkerian | Australia (Queensland) | Acanthodopsis russelli (238150) | |
| Holkerian - Asbian | United Kingdom (England) | Acanthodopsis acuta, Acanthodopsis summiti (229814) | |
| Moscovian | United Kingdom | Acanthodopsis wardi (137319) |