possible role of echolocation in K-T survival

["Pat Grant (Library: Serials Catalog" <PATG@vax2.concordia.ca>]

Given that only small terrestrial animals survived the K-T
event, and given that, among terrestrial animals, SKAIK only the small
ones echolocate, has there been any attempt to link ability to
echolocate with survival at the K-T?  (Not that I can suggest any
means of testing such an idea, even approximately--it just seems
intuitively likely that something that could help an animal locate
food and others of its own kind, even in conditions of total darkness,
might be a significant contributor to survival in some of the proposed
K-T scenarios.  Especially since it may be a primitive character for
mammals--perhaps fossilized auditory bullae could give some evidence?)

Pat