Xylacanthus (fish)

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Xylacanthus Temporal range: Wenlock–Pragian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Acanthodii
Order:	†Ischnacanthiformes
Family:	†Ischnacanthidae
Genus:	†Xylacanthus Tor Ørvig, 1967
Species
†X. kenstewarti †X. minutus †X. grandis

Xylacanthus is a genus of extinct acanthodian fish belonging to the family Ischnacanthidae. It lived during the Silurian to Devonian periods. Three species of Xylacanthus are known, X. kenstewarti from Late Wenlock to Early Ludlow from the Mackenzie Mountains in Canada,^[1] X. minutus from Lochkovian of Spitsbergen in Norway,^[2] and X. grandis from Siegenian of Spitsbergen.^[3] X. grandis was the largest acanthodian with 35 cm (14 in) long jaw bone and estimated total length of 2.5 m (8 ft 2 in).^[3]

References

^ Hanke, Gavin F; Wilson, Mark VH; Lindoe, L Allan (2001). "New species of Silurian acanthodians from the Mackenzie Mountains, Canada". Canadian Journal of Earth Sciences. 38 (11): 1517–1529. doi:10.1139/e01-039. ISSN 0008-4077.
^ "Nouveaux poissons acanthodiens du Dévonien du Spitsberg". Geodiversitas. 19 (3): 505–513. 1997.
^ ^a ^b Ørvig, Tor (1967). "Some new acanthodian material from the Lower Devonian of Europe". Journal of the Linnean Society of London, Zoology. 47 (311): 131–153. doi:10.1111/j.1096-3642.1967.tb01400.x.

Total group Chondrichthyes (including "acanthodians")

Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata

Gnathostomata

see Gnathostomata
Chondrichthyes	see below↓

Chondrichthyes

†Sinacanthidae

†"Ischnacanthiformes"

Acanthospina Campylodus Granulacanthus Machaeracanthus? Onchus Serradentus
Acritolepidae	Acritolepis Monospina Nerepisacanthus Pechoralepis
Ischnacanthidae	Arcticacanthus Arenaceacanthus Atopacanthus Bracteatacanthus Cacheacanthus Erymnacanthus Euryacanthus Gomphonchus Grenfellacanthus Ischnacanthus Marsdenius? Persacanthus Plectrodus Rockycampacanthus Rohonilepis Taemasacanthus Tricuspicanthus Xylacanthus
Podoliacanthidae	Drygantacanthus Kasperacanthus Podoliacanthus
Poracanthodidae	Gomphonchoporus Machaeraporus Obruchevacanthus? Poracanthodes Radioporacanthodes Taimyrolepis Trundlelepis Zemlyacanthus

†Diplacanthiformes

Bryantonchus Culmacanthus? Devononchus Striacanthus Tetanopsyrus Uraniacanthus
Diplacanthidae	Diplacanthus Milesacanthus Ptychodictyon Rhadinacanthus

†Acanthodiformes

Halimacanthodes Howittacanthus
Acanthodidae	Acanthodes Acanthodopsis Traquairichthys
Cheiracanthidae	Cheiracanthus Fallodentus Ginkgolepis Homalacanthus Markacanthus
Mesacanthidae	Lodeacanthus Melanoacanthus Mesacanthus Orcadacanthus Promesacanthus Teneracanthus? Triazeugacanthus

"Climatiiformes"
and related taxa

†Brochoadmones †Dobunnacanthus †Fanjingshania? †Kathemacanthus †Lupopsyroides †Lupopsyrus †Obtusacanthus †Paucicanthus †Ptomacanthus †Qianodus? †Vernicomacanthus
†Climatiidae	Brachyacanthus Climatius Erriwacanthus Nodocosta? Parexus Sevyacanthus
†Gyracanthidae	Aganacanthus? Ankylacanthus Gyracanthides Gyracanthus Oracanthus?

"Conventionally defined
chondrichthyans"

- see below↓

"Conventionally defined chondrichthyans"

†Antarctilamnidae

Antarctilamna
Wellerodus?

†Mcmurdodontidae

Maiseyodus
Mcmurdodus

†Pucapampellidae

Gydoselache
Pucapampella

†Omalodontiformes

Siberiodus
Aztecodontidae	Aztecodus Manberodus
Omalodontidae	Doliodus? Omalodus Portalodus

†"Ctenacanthiformes"

Neosaivodus Saivodus Sculptospina Tamiobatis
Ctenacanthidae	Arduodens? Cladodoides Cladodus Ctenacanthus Goodrichthys Natarapax? Troglocladodus
Heslerodidae	Avonacanthus Bythiacanthus Dracopristis Glencartius Glikmanius Heslerodoides Heslerodus Kaibabvenator Nanoskalmae

†Jalodontidae

†Phoebodontidae

†Symmoriiformes

Dwykaselachus Ferromirum Kawichthys Kungurodus? Maiseyacanthus
Cladoselachidae?	Cladoselache Maghriboselache
Falcatidae	Cosmoselachus Cretacladoides? Damocles Denaea Falcatus Ozarcus? Stethacanthulus
Symmoriidae	Akmonistion Cobelodus Crioselache? Stethacanthus Symmorium

†Bransonelliformes

Barbclabornia
Bransonella

†Xenacanthiformes

Orthacanthus Tikiodontus
Diplodoselachidae	Decentrodus Diplodoselache Hagenoselache Hokomata Lebachacanthus Taquaralodus
Xenacanthidae	Mooreodontus Plicatodus Triodus Wurdigneria Xenacanthus

Crown-Chondrichthyes

Holocephali
Elasmobranchii

Incertae sedis scale-based taxa

†Altholepidiformes?

Altholepis
Tezakia

†Elegestolepidida?

Kannathalepis
Elegestolepididae	Deltalepis Elegestolepis Ellesmereia

†Mongolepidida?

Solinalepis
Mongolepididae	Mongolepis Rongolepis Sodolepis Taklamakanolepis Teslepis
Shiqianolepidae	Chenolepis Shiqianolepis Tielikewatielepis Xiaohaizilepis Xinjiangichthys

†Tchunacanthidae

†Vesperaliidae

Acanthacanthus
Vesperalia

Others

†Canyonlepis?
†Frigorilepis?
†Funicristata
†Gualepis
†Ivanelepis
†Jolepis
†Karksilepis
†Lunalepis
†Nobilesquama
†Nostolepis
†Nostovicina
†Ohiolepis
†Seretolepis
†Tuvalepis
†Wellingtonella?
†Yuanolepis

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