Triconodontidae

Triconodontidae Temporal range: Middle Jurassic - Late Cretaceous,
Triconodon mordax jaw, Richard Owen 1861
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	†Eutriconodonta
Family:	†Triconodontidae Marsh, 1887
Type species
†Triconodon mordax Owen, 1859
Genera
Alticonodon Fox, 1969 Arundelconodon Cifelli et al., 1999 Astroconodon Patterson, 1951 Corviconodon Cifelli et al., 1998 Eotriconodon Sigogneau-Russell, 2016 Meiconodon Kusuhashi et al., 2009 Priacodon Marsh, 1887 Triconodon Owen, 1859 Trioracodon Simpson, 1928 Victoriaconodon Montellano et al., 2008

Triconodontidae is an extinct family of actively mobile mammal, endemic to what would be North America, Europe, Africa and probably also South America and Asia during the Jurassic through Cretaceous periods at least from 190—70.6 mya. They are distinguished from amphilestids and gobiconodontids due to their occlusion patterns: instead of interlocking mollars, triconodontids fit their teeth more directly, with lower cusp "a" occluding anteriorly to upper cusp "A", between "A" and "B".

Taxonomy

Triconodontidae was named by Marsh (1887). It was assigned to Polyprotodontia by Cope (1889); to Triconodonta by Rasmussen and Callison (1981), Bonaparte (1986), Carroll (1988) and Engelmann and Callison (1998); and to Mammalia by Marsh (1887) and Luo et al. (2001).

Family †Triconodontidae Marsh 1887

Figure below is based on Martin et al. 2015.

• †Victoriaconodon Montellano et al., 2008
  • †Victoriaconodon inaequalis Montellano et al., 2008
• †Priacodon Marsh, 1887
  • †P. fruitaensis Rasmussen & Callison, 1981
  • †P. robustus (Marsh 1879) [Tinodon robustus]
  • †P. ferox (Marsh, 1880) [Tinodon ferox]
  • †P. grandaevus Simpson, 1925 [Tinodon grandaevus]
  • †P. lulli Simpson, 1925 [Tinodon lulli]
• †Triconodon Owen, 1859
  • †Triconodon mordax Owen, 1859 [Triacanthodon Owen, 1871]
• †Trioracodon Simpson, 1928 non Owen, 1871
  • †T. ferox (Owen, 1871)
  • †T. major (Owen, 1871)
  • †T. bisulcus (Marsh, 1880) [Triconodon bisulcus Marsh, 1880]
  • †T. oweni Simpson, 1928
• †Meiconodon Kusuhashi et al., 2009
  • †M. lii Kusuhashi et al., 2009
  • †M. setoguchii Kusuhashi et al., 2009
• †Arundelconodon Cifelli et al., 1999
  • †Arundelconodon hottoni Cifelli et al., 1999
• †Astroconodon Patterson, 1951
  • †A. denisoni Patterson, 1951
  • †A. delicatus Cifelli & Madsen, 1998
• †Alticonodon Fox, 1969
  • †Alticonodon lindoei Fox, 1969
• †Corviconodon Cifelli, Wible & Jenkins, 1998
  • †C. utahensis Cifelli & Madsen, 1998
  • †C. montanensis Cifelli, Wible & Jenkins, 1998
• Eotriconodon Sigogneau-Russel, 2016
  • Eotriconodon sophron Sigogneau-Russell, 2016

Sometimes Volaticotheria is recovered as a part of this group. However, most recent phylogenetic studies seem to group it outside of Triconodontidae.

Phylogeny

Cladogram after Thomas Martin et al. 2015

	Trioracodon
	Triconodon Priacodon Arundelconodon Meiconodon Astroconodon Alticonodon Corviconodon