Exceptionally preserved North American Paleogene metatherians: adaptations and discovery of a major gap in the opossum fossil record
M. Sánchez-Villagra,
S. Ladevèze,
I. Horovitz,
C. Argot,
J. J Hooker,
T. E Macrini,
T. Martin,
S. Moore-Fay,
C. de Muizon,
T. Schmelzle, and
R. J. Asher
2007
Article
Biology Letters
3:318-322
Find it at:
http://dx.doi.org/10.1098/rsbl.2007.0090