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mammals. It is the oldest known mammal with putatively tribosphenic teeth; at the time of its discovery it antedated the second oldest example by about 25Â million years. (
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85:(shelf) on the inner, or lingual, side of the tooth. The molars have a similar cingulum, three cusps at the front, and a
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with a main cusp, a smaller cusp, and a crest at the back. Features of the talonid suggest that
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molars, the basic arrangement of molar features also present in
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145:Effects of Hurricane Isabel in Delaware
18:Knowledge:Today's featured article
77:. The premolar consists of a central
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81:with one or two smaller cusps and a
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61:, it is known from a fragmentary
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118:Mesozoic mammals of Madagascar
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67:(pictured)
55:Madagascar
134:Wipeout 3
103:placental
99:marsupial
63:lower jaw
49:from the
163:By email
91:Ambondro
83:cingulum
71:premolar
59:Ambondro
156:Archive
87:talonid
75:molars
47:mammal
177:About
45:is a
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