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New Mammals in _American Museum Novitates_
Meng J., A. R. Wyss, Hu Y.-m., Wang Y.-q., G. J. Bowen, and P. L. Koch. 2005.
Glires (Mammalia) from the late Paleocene Bayan Ulan locality of Inner
Mongolia. _American Museum Novitates_ 3473:1-25.
"Two new early diverging members of Glires, *Eomylus bayanulanensis*, n.sp.
and *Palaeomylus lii*, n.gen. and n.sp., are described from the late
Paleocene Bayan Ulan Fauna, Inner Mongolia, China. These species add
significantly to the diversity of Glires known from the early Paleogene of
Asia. *E. bayanulanensis* and *Palaeomylus* sp. come from the lowest level
the Bayan Ulan section, from which the classic Bayan Ulan Fauna was
collected. *Palaeomylus lii* and specimens belonging to two other genera of
mammals, *Pseudictops* and *Palaeostylops*, are found from a horizon about 8
m above strata yielding the Bayan Ulan Fauna. These taxa are tentatively
regarded as constituting a distinct faunal assemblage, which may prove to be
of biostratigraphic utility within the region. Two calcanea tentatively
assigned to *Gomphos* from a stratigraphic horizon slightly above the bed
producing *P. lii* suggest the presence of strata of Early Eocene age in the
Bayan Ulan section."
Hu Y.-m., R. C. Fox, Wang Y.-q. and Li C.-k. 2005. A new spalacotheriid
symmetrodont from the early Cretaceous of northeastern China. _American
Museum Novitates_ 3475:1-20.
"Symmetrodonts are Mesozoic mammals having lower molars with nearly
symmetrical trigonids but lacking talonids. They appear to be stem members
the mammalian clade that led to extant tribosphenic mammals, but the fossil
record of symmetrodonts is poor. Here we report a new genus and species of
acute-angled spalacotheriid symmetrodont, *Heishanlestes* changi, n.gen. and
n.sp., represented by well-preserved lower jaws with teeth from the Early
Cretaceous of northeastern China. The new mammal has four tightly spaced
premolars and three morphological groups of lower molars, in which the first
molar has an obtuse trigonid angle and the last two molars have a large
neomorphic cusp in the center of the trigonid, a feature not seen in other
mammals. *Heishanlestes* appears to be a specialized member of the
spalacotheriid subfamily, Spalacolestinae, which is otherwise only known
North America. The animal probably used the premolars to crush its prey
before shearing it with the molars."
Jaime A. Headden
Little steps are often the hardest to take. We are too used to making leaps
in the face of adversity, that a simple skip is so hard to do. We should all
learn to walk soft, walk small, see the world around us rather than zoom by it.
"Innocent, unbiased observation is a myth." --- P.B. Medawar (1969)
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