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Achaenodon is an
extinct artiodactyl mammal,
possibly belonging to the
family Helohyidae. It
lived in the mid-late
Eocene (about 43-39
million years ago)...
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consisting of itself,
Achaenodon, Erlianhyus, Protentelodon, Wutuhyus, and Entelodontidae. It was
found to be most
closely related to
Achaenodon and Erlianhyus...
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elongated (e.g. in Helohyus), but in some
forms ascribed to this
family (
Achaenodon), it was very short.
Compared to
other primitive artiodactyls such as...
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Cetancodontamorpha Spaulding et al., 2009
Subgroups †Siamotherium †Erlianhyus †Wutuhyus †
Achaenodon †Andrewsarchus †Proentelodon †Entelodontidae Whippomorpha...
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William Berryman Scott, in 1940,
concurred that it was a
relative of
Achaenodon,
though placed it
within "Palaeodonta". This
interpretation would be followed...
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phylogenetic analysis that
recovered it in a
polytomy with
Andrewsarchus and
Achaenodon.
Erlianhyus is
known from a
partial maxilla that
preserves teeth P3–M3...
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define the
Uintan North American Land
Mammal Age. The
index taxa include:
Achaenodon, Amynodon, Diplacodon, Eobasileus, Leptotragulus, Oxyaenodon, Oromeryx...
- respectively.
Colbert compared B.
wyomingensis to Helohyus, Chaeropotamus,
Achaenodon, and
Parahyus based on
tooth shape. No
mandibles were
preserved with the...
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osmontii †Acericecis †Acericecis
chaneyi – type
locality for
species †
Achaenodon †
Achaenodon fremdi – type
locality for
species †Achlyoscapter †Achlyoscapter...
- †Acer
aequidentatum †Acer
scottiae Acesta †Acesta
multiradiata †
Achaenodon †
Achaenodon robustus – or
unidentified comparable form
Acila †Acila castrensis...
