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Ischyodus

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Ischyodus
Fossil range: Middle Jurassic - Miocene
Ischyodus1
Artist's rendition of Ischyodus.
Scientific classification

Subclass:

Holocephali

Order:

Chimaeriformes

Family:

Callorhynchidae

Genus:

Ischyodus

Species:

See text.

Ischyodus is an extinct genus of cartilaginous fish belonging to the subclass Holocephali, which includes the modern-day chimaeras.

Ischyodus was virtually identical to the present-day chimaera Chimaera monstrosa, which is found in the Atlantic Ocean and Mediterranean Sea. Just like C. monstrosa, Ischyodus had large eyes, a long whip-like tail, small lips, large pectoral fins and dorsal fin, and a poisonous dorsal spike attached to the front of the dorsal fin. The spike probably served as a method of protection against predators.

Dental plates have been found at several sites in North Dakota.

SpeciesEdit

Ischyodus avitus

Ischyodus avitus

  • Ischyodus bifurcatus
  • Ischyodus brevirostris
  • Ischyodus dolloi
  • Ischyodus gubkini
  • Ischyodus incisus
  • Ischyodus latus
  • Ischyodus lonzeensis
  • Ischyodus minor
  • Ischyodus mortoni
  • Ischyodus planus
  • Ischyodus rayhassi
  • Ischyodus thurmanni
  • Ischyodus townsendi
  • Ischyodus williamsae
  • Ischyodus yanshini
  • Ischyodus zinsmeisteri
Mantell's Iguanodon restoration

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