Despite many explorations and surveys, the geographic distribution of many primate species, particularly in the neotropics, is not yet well known. In this paper, we provide evidence that extends the range of Spix's saddle-back tamarin in Peru.

Alfaxalone is a general anesthetic used widely in veterinary medicine and has a chemical structure similar to progesterone. Here we report an unexpectedly high serum progesterone value in a female common marmoset following the treatment with alfaxalone. Cross-reactivity of the antibody used in the progesterone assay with alfaxalone most likely explains this finding, and therefore evaluation of serum progesterone results in animals treated with alfaxalone should be done with caution.