Summary: DINOSAURS,
EXTINCTION THEORIES
FOR
J. David Archibaldn
and Norman MacLeodw
n
San Diego State University and w
Natural History Museum
I. Yet Another Dante's Inferno
II. Multiple Causes
III. Long-Term Trends in Dinosaur Diversity
IV. Short-Term Trends in Dinosaur Diversity
V. Out with a Whimper, a Bang, or Both?
VI. Conclusions
GLOSSARY
ammonites Shelled group of invertebrates related to
octopus, squid, and nautilus.
amniota Taxon of vertebrates including mammals
and reptiles (including birds).
archaic ungulates (or condylarths) Extinct group or

Source: Archibald, J. David - Department of Biology, San Diego State University

Collections: Biology and Medicine; Geosciences