Cheiracanthus information

Cheiracanthus; Temporal range: Middle Devonian
	Fossil of Cheiracanthus latus at the London Natural History Museum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Acanthodii
Order:	†Acanthodiformes
Family:	†Cheiracanthidae
Genus:	†Cheiracanthus; Agassiz, 1835
Type species
	† Cheiracanthus murchisoni;

Cheiracanthus (from Greek: χείρ kheír, 'hand' and Greek: ἄκανθα akantha, 'spine')^[1] is an extinct genus of a group of fish called Acanthodii (or "spiny sharks").^[2] It was a deep-bodied acanthodian about 12 in. (30 cm) in length. It had a blunt head, upturned tail, and fins protected by spines. Unlike many other acanthodians, it had one, solitary dorsal fin. Cheiracanthus swam at mid-depth in lakes and rivers, seizing small prey in its gaping jaws. Whole fossils of this fish occur only in Mid-Devonian rocks in Scotland, but its distinctive small, ornamented scales crop up around the world, as far south as Antarctica.

^ Roberts, George (1839). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 29. Retrieved 29 December 2021.
^ Burrow, Carole; Blaauwen, Jan den; Newman, Michael (2020-04-01). "A redescription of the three longest-known species of the acanthodian Cheiracanthus from the Middle Devonian of Scotland". Palaeontologia Electronica. 23 (1): 1–43. doi:10.26879/1035. ISSN 1094-8074.

[1] Roberts, George (1839). An etymological and explanatory dictionary of the terms and language of geology. London: Longman, Orme, Brown, Green, & Longmans. p. 29. Retrieved 29 December 2021.

[2] Burrow, Carole; Blaauwen, Jan den; Newman, Michael (2020-04-01). "A redescription of the three longest-known species of the acanthodian Cheiracanthus from the Middle Devonian of Scotland". Palaeontologia Electronica. 23 (1): 1–43. doi:10.26879/1035. ISSN 1094-8074.

Cheiracanthus information

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Cheiracanthus

Heterophrynus

Acanthodii

Acanthodiformes

Cosmoselachus

Xenacanthida

Symmoriiformes

Gyracanthides

Xenacanthus

Parexus

Saivodus

Plesioselachus

Mcmurdodus

Triodus

Ischnacanthus

Symmorium

Acanthodes

Fanjingshania

Maghriboselache

Kawichthys

Arduodens

Poracanthodes

Brochoadmones

Aztecodus

Goodrichthys

Climatiiformes

Gyracanthus

Cladoselachidae

Barbclabornia

Cheiracanthus Temporal range: Middle Devonian

Fossil of Cheiracanthus latus at the London Natural History Museum
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Acanthodii
Order:	†Acanthodiformes
Family:	†Cheiracanthidae
Genus:	†Cheiracanthus Agassiz, 1835
Type species
† Cheiracanthus murchisoni