locate.fossil(tree, X, ...)"phylo".time.constraint which can be a scalar (positive height above the root of the fossil or negative time before present) or a vector (age range of fossil, either positive or negative); edge.constraint, which is equivalent to constraint in locate.yeti; plot, rotate, and quiet, which have the same interpretation (and defaults) as the equivalent arguments in locate.yeti."phylo".
Felsenstein, J. (2002) Quantitative characters, phylogenies, and morphometrics. In: MacLeod, N. and P. Forey (Eds.) Morphology, Shape and Phylogeny (pp. 27-44). Taylor and Francis, London.
Revell, L. J. (2012) phytools: An R package for phylogenetic comparative biology (and other things). Methods Ecol. Evol., 3, 217-223.
Revell, L. J., D. L. Mahler, R. G. Reynolds, and G. J. Slater. (In press) Placing cryptic, recently extinct, or hypothesized taxa into an ultrametric phylogeny using continuous character data: A case study with the lizard Anolis roosevelti. Evolution.