He was 77. He served on Claremont McKenna College’s Board of Trustees from 1983-1991.
The New York Times has the story, but here are the essential paragraphs.
See more on the Claremont McKenna College website.
Malcolm Carnegie McKenna was born on July 21, 1930, in Pomona, Calif. His father, Donald, was a founding trustee of Claremont McKenna College, in Claremont, Calif. A great-grandparent was a cousin of the steel magnate Andrew Carnegie.
Inspired by the founder of his preparatory school’s paleontology museum, young Malcolm plunged into field work and collected his first fossil skull in Nebraska at the age of 17. He attended the California Institute of Technology and Pomona College, then graduated in paleontology at the University of California, Berkeley, where he also earned his Ph.D.
He joined the staff of the American Museum in 1960, the youngest curator there at the time. He continued fieldwork in the American West, often taking along the whole growing family.
Besides his wife, he is survived by three sons, Douglas and Andrew, of Boulder, and Bruce, of Santa Fe, N.M.; a daughter, Katharine McKenna of Woodstock, N.Y.; and nine grandchildren.