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Ischnacanthiformes

Cephalopoda - Redfieldiiformes - Brookvaliidae

Taxonomy
Ischnacanthiformes was named by Berg (1940). It is not extant.

It was assigned to Acanthodii by Nelson et al. (2016); to Acanthodii by Dineley and Metcalf (1999), Burrow (2011), Long (2011), van der Laan (2019); and to Acanthodii by Burrow and Elliott (2023).

Subtaxa
Acanthospina, Acritolepidae, Ischnacanthidae, Podoliacanthus, Poracanthodidae, Serradentus, Tetanopsyridae, Xylacanthus
Entered
by A. Hendy on 2009-07-17; modified by G. Lloyd on 2013-04-30

Synonymy list
YearName and author
1940Ischnacanthiformes Berg
1999Ischnacanthiformes Dineley and Metcalf p. 11
2011Ischnacanthiformes Burrow p. 1331
2011Ischnacanthiformes Long p. 242
2016Ischnacanthiformes Nelson et al. p. 100
2019Ischnacanthiformes van der Laan p. 33
2023Ischnacanthiformes Burrow and Elliott p. 3

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—HalecostomiRegan 1903
infraclassChondrosteiMüller 1844
infraclassActinopteri()
orderRedfieldiiformes(Berg 1940)
familyBrookvaliidaeBerg 1940
—NeopterygiiRegan 1923
—Protostomia
—Spiralia
RankNameAuthor
superphylumLophotrochozoa
phylumMollusca
classCephalopodaCuvier 1797
subclassAmmonoidea()
orderAmmonitidaHaeckel 1866
classAcanthodiiOwen 1846
suborderHaploceratina
superfamilyHaploceratoidea(Zittel 1884)
familyOppeliidaeBonarelli 1894
orderIschnacanthiformesBerg 1940
genusIschnacanthiformes

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
show all | hide all
G. †Acanthospina Valiukevicius 2003
+
†Acanthospina irregulare Valiukevicius 2003
Fm. †Acritolepidae Valiukevicius and Burrow 2005
+
G. †Acritolepis Valiukevicius 2003
+
†Acritolepis urvantsevi Valiukevicius 2003
†Acritolepis ushakovi Valiukevicius 2003
G. †Nerepisacanthus Burrow 2011
+
†Nerepisacanthus denisoni Burrow 2011
Fm. †Ischnacanthidae Woodward 1891
+
G. †Acanthodopsis Hancock and Atthey 1868
+
†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
+
†Apateacanthus dentatus Hussakof and Bryant 1919
†Apateacanthus peculiaris Hussakof 1913
†Apateacanthus vetustus Clarke 1885
G. †Arcticacanthus Valiukevicius 2003
+
†Arcticacanthus bicostatus Valiukevicius 2003
G. †Bracteatacanthus Valiukevicius 2004
+
†Bracteatacanthus assiduus Valiukevicius 2004
G. †Cacheacanthus Burrow 2007
+
†Cacheacanthus utahensis Burrow 2007
G. †Cambaracanthus Lindley 2000
+
G. †Cavanacanthus Lindley 2000
+
†Cavanacanthus warrooensis Lindley 2000
G. †Gomphonchus Gross 1971
+
†Gomphonchus hoppei Gross 1947
†Gomphonchus sandelensis Pander 1856
G. †Grenfellacanthus Long et al. 2004
+
†Grenfellacanthus zerinae Long et al. 2004
G. †Helenacanthus Bryant 1934
+
†Helenacanthus incurvus Bryant 1934
G. †Ictinocephalus Page 1859
G. †Ischnacanthus Powrie 1864
+
†Ischnacanthus anglicus White 1961
†Ischnacanthus gracilis Egerton 1861
†Ischnacanthus kingi White 1961
†Ischnacanthus scheii Spjeldnaes 1967
†Ischnacanthus wickhami White 1961
G. †Marsdenius Wellburn 1902
+
†Marsdenius acuta Wellburn 1902
†Marsdenius summiti Wellburn 1902
G. †Persacanthus Janvier 1977
+
†Persacanthus kermanensis Janvier 1977
G. †Rohonilepis Valiukevicius 2004
+
†Rohonilepis breviornatus Valiukevicius 2004
G. †Taemasacanthus Long 1986
+
†Taemasacanthus erroli Long 1986
†Taemasacanthus porca Lindley 2000
G. †Uraniacanthus Miles 1973
+
†Uraniacanthus curtus Powrie 1870
†Uraniacanthus spinosus Miles 1973
G. †Podoliacanthus Voichyshyn and Szaniawski 2012
+
†Podoliacanthus zychi Voichyshyn and Szaniawski 2012
Fm. †Poracanthodidae Vergoossen 1997
+
G. †Acanthopora Valiukevicius 2003
+
†Acanthopora transitans Valiukevicius 2003
G. †Poracanthodes Brotzen 1934
+
†Poracanthodes menneri Valiukevicius 1992
G. †Serradentus Newman et al. 2019
+
†Serradentus armstrongi Newman et al. 2019
Fm. †Tetanopsyridae Hanke and Wilson 1999
+
G. †Tetanopsyrus Gagnier et al. 1999
+
†Tetanopsyrus breviacanthias Hanke et al. 2001
†Tetanopsyrus lindoei Gagnier et al. 1999
G. †Xylacanthus Orvig 1967
+
†Xylacanthus grandis Orvig 1967
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: aragoniteo
Environment: marinec
Locomotion: actively mobilec
Life habit: nektonicc
Diet: carnivorec
Vision: well-developedc
Created: 2004-09-24 07:51:17
Modified: 2009-12-13 03:07:42
Source: o = order, c = class
References: Kiessling 2004, Kiessling 2003, Aberhan et al. 2004

Age range: base of the Ludfordian to the top of the Late/Upper Albian or 425.00000 to 100.50000 Ma

Collections (300 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Wenlock - Ludlow432.9 - 422.7Greenland Gomphonchus sandelensis (239394)
Ludlow426.7 - 422.7Australia (Queensland) Gomphonchus turnerae (232518)
Ludlow426.7 - 422.7China (Yunnan) Gomphonchus sp., Poracanthodes qujingensis (27796)
Ludfordian425.0 - 422.7United Kingdom (England) Ischnacanthus kingi (8314 8320)
Ludfordian425.0 - 422.7China (Junnan) Gomphonchus sp., Poracanthodes qujingensis (182558)
Ludfordian425.0 - 422.7Lithuania Rohonilepis breviornatus (192569 192666)
Kaugetuma422.7 - 421.6Estonia Gomphonchus sandelensis (195606)
Pridoli422.7 - 419.62Canada (New Brunswick) Nerepisacanthus denisoni (161317)
Pridoli422.7 - 419.62Lithuania Bracteatacanthus assiduus (238156 238157) Rohonilepis breviornatus (192553 192568 192586 192652 238159 238160 238161 238162)
Pridoli422.7 - 419.62China (Gansu) Gomphonchus sandelensis (182526)

Youngest occurrences
Time interval Ma Country or state PBDB collection number
Late/Upper Aptian - Early/Lower Albian119.57 - 110.1Antarctica Aconeceras nisoides (64184)
Albian - Aptian113.2 - 113.2Antarctica (Alexander Island) Sanmartinoceras sp. (2079)
Early/Lower Albian113.2 - 110.1United Kingdom (England) Aconeceras sp. (1853 1862 1864)
Albian113.2 - 100.5Svalbard and Jan Mayen Sanmartinoceras sp., Sanmartinoceras pusillum (212981)
Albian113.2 - 100.5Antarctica Aconeceras sp. (64200) Aconeceratinae indet. (83358)
Late/Upper Albian106.3 - 100.5USA (California) Sanmartinoceras walshense (225508)
Late/Upper Albian106.3 - 100.5Argentina (Santa Cruz) Koloceras talenkanum (74297)
Late/Upper Albian106.3 - 100.5Nigeria Gyaloceras ibo (82731 82767)
Late/Upper Albian106.3 - 100.5South Africa Koloceras talenkanum (66071 82292)
Late/Upper Albian106.3 - 100.5Angola Aconeceras sp. (83840)