- eutriconodonts, multituberculates, symmetrodonts,
dryolestids and
boreosphenidans but
mostly remain small.
First birds, lizards,
snakes and turtles....
-
members of the
Neornithes (modern birds). Sinodelphys, a 125 Ma-old
boreosphenidan mammal found in the
Yixian Formation, China, is one of the
oldest mammal...
-
Hemisphere and had
tribosphenic molars (three-cusped ch**** teeth). In
boreosphenidans, the
mandibular angle is
placed posteriorly and the
primitive postdentary...
- 57: 124–131. Kielan-Jarorowska, Z.; Cifelli, R.L. (2001). "Primitive
boreosphenidan mammal (?Deltatheroida) from the
Early Cretaceous of Oklahoma". Acta...
- 22:286–298. Kielan-Jarorowska, Z., and Cifelli, R.L. 2001.
Primitive boreosphenidan mammal (?Deltatheroida) from the
Early Cretaceous of Oklahoma. Acta...
- 57:124–131. Kielan-Jarorowska, Z., and Cifelli, R. L. 2001.
Primitive boreosphenidan mammal (?Deltatheroida) from the
Early Cretaceous of Oklahoma. Acta...
-
common ancestor that they
share with
marsupials and
placentals (from
boreosphenidans); this idea
still has some critics. For example, the
dentition of the...
-
United States. Z. Kielan-Jaworowska and R. L. Cifelli. 2001.
Primitive boreosphenidan mammal (?Deltatheroida) from the
Early Cretaceous of Oklahoma. Acta...
-
northwestern Madagascar.
Details of its
crown morphology indicate that it is a
boreosphenidan, a
member of the
group that
includes living marsupials and placental...
- 124–131. Kielan-Jaworowska, Zofia; Cifelli,
Richard L (2001). "Primitive
boreosphenidan mammal (?Deltatheroida) from the
Early Cretaceous of Oklahoma". Acta...
