Article du Bulletin
Albumin evolution within New World squirrels (Sciuridae) [Evolution de l'albumine des écureuils du Nouveau Monde].
Ellis L.S. & L.R. Maxson · 1980 · Amer. Midl. Nat., 104(1): 57-62.
Résumé
Immunological studies of the Sciuridae using quantitative microcomplement fixation indicate that the ground squirrel and shipmunk lineages diverged from tree squirrels during the early Oligocene (34-39 MA). Chipmunks and ground squirrels diverged during Miocene (22 MA). Radiationwithin the ground squirrel lineage appears to have taken place during the early and middle Miocene. These findings are, for the most part, consistent with fossil, karyotypic and other biochemical data.