The Journal of Evolutionary
Psychology has published its special issue on language evolution, and access is currently free.
Here's the table of contents:
Evolutionary psychology and the origins of language (editorial)
Thomas C. Scott-Phillips
Review of geographic variation in terrestrial mammalian acoustic signals: Human speech variation in a comparative perspective
Adriano R. Lameira, Roberto A. Delgado and Serge A. Wich
Environment, methodology, and the object choice task in apes: Evidence for declarative comprehension and implications for the evolution of language
Modelling vocal anatomy’s significant effect on speech
Bart de Boer
What exactly evolved?
A review of The Evolution of Human Language: Biolinguistic Perspectives , edited by Richard K. Larson, Viviane Déprez, Hiroko
A minimal approach is insufficient
A review of Language Evolution and Syntactic Theory by Anna R. Kinsella
How language came to be?
A review of The Evolution of Language , by Tecumseh Fitch