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Archaeotherium
Taxonomy
Archaeotherium was named by Leidy (1850).
It was synonymized subjectively with Entelodon by Leidy (1853); it was synonymized subjectively with Elotherium by Leidy (1857) and Leidy (1873).
It was assigned to Entelodontidae by Leidy (1850), Peterson (1909), Scott (1940), Galbreath (1953), Wood (1960), Russell (1980), Carroll (1988), Effinger (1998), Thewissen et al. (2001), Foss (2007), Vislobokova (2008) and Spaulding et al. (2009).
It was synonymized subjectively with Entelodon by Leidy (1853); it was synonymized subjectively with Elotherium by Leidy (1857) and Leidy (1873).
It was assigned to Entelodontidae by Leidy (1850), Peterson (1909), Scott (1940), Galbreath (1953), Wood (1960), Russell (1980), Carroll (1988), Effinger (1998), Thewissen et al. (2001), Foss (2007), Vislobokova (2008) and Spaulding et al. (2009).
Species
A. calkinsi, A. caninus, A. coarctatum (syn. Elotherium arctatum), A. crassum, A. imperator, A. marshi, A. mortoni (syn. Arctodon vetustum, A. robustum, Elotherium clavum, Rhinoceros americanus), A. palustris, A. scotti, A. superbum, A. trippensis, A. wanlessi, Choerodon calkinsi, Eotherium abeli, Eotherium markgrafi
Synonyms
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Synonymy list
Year | Name and author |
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1850 | Archaeotherium Leidy |
1853 | Eotherium Leidy p. 392 |
1873 | Elotherium imperator Leidy p. 217 |
1902 | Elotherium imperator Hay p. 655 |
1904 | Eotherium Palmer p. 265 |
1909 | Archaeotherium Peterson |
1915 | Entelodon imperator Cope and Matthew pp. Plate CIXa |
1920 | Choerodon Troxell p. 441 |
1940 | Archaeotherium Scott p. 379 figs. Plates XXXVIII, XL, XLII, XLIII |
1953 | Archaeotherium Galbreath |
1960 | Archaeotherium Wood |
1980 | Archaeotherium Russell p. 5 |
1988 | Archaeotherium Carroll |
1998 | Archaeotherium Effinger p. 378 |
1998 | Choerodon Effinger p. 378 |
2001 | Archaeotherium Thewissen et al. p. suppl. |
2007 | Archaeotherium Foss p. 126 |
2008 | Archaeotherium Vislobokova |
2008 | Choerodon Vislobokova |
2009 | Archaeotherium Spaulding et al. p. e7062 |
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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.
G. †Archaeotherium Leidy 1850
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†Archaeotherium calkinsi Sinclair 1905
†Archaeotherium caninus Troxell 1920
†Archaeotherium crassum Marsh 1873
†Archaeotherium marshi Troxell 1920
†Archaeotherium mortoni Leidy 1850
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†Archaeotherium clavus darbyi Troxell 1920
Invalid names: Archaeotherium robustum Leidy 1852 [synonym], Arctodon vetustum Leidy 1852 [synonym], Elotherium clavum Marsh 1893 [synonym], Rhinoceros americanus Leidy 1852 [synonym]
†Archaeotherium palustris Schlaikjer 1935
†Archaeotherium scotti Sinclair 1922
†Archaeotherium trippensis Skinner et al. 1968
†Archaeotherium wanlessi Sinclair 1922
Invalid names: Archaeotherium imperator Leidy 1873 [nomen dubium], Archaeotherium superbum Leidy 1868 [nomen dubium], Choerodon Troxell 1920 [synonym], Eotherium Leidy 1853 [synonym]
Diagnosis
Reference | Diagnosis | |
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L. S. Russell 1980 | Entelodonts of large but not largest size. Diastema present between first and second premolars and to a lesser extent between second and third premolars; premolars double-rooted except P^, which is triple-rooted, and P\ which may be single-rooted; P"* trianguloid, due to anterad bulge of anterolabial portion; lower molars with trigonid higher than talonid. Lower margin of jugals produced as a long, flat process, projecting ventrolaterad and more or less posterad. Mandible with sloping symphysis; prominent mental process projecting ventrolaterad from ventral margin of ramus below canine root; most but not all species have a second, similar process below P4; angular margin broadly rounded, projecting ventrad and somewhat laterad, not thickened. |