Penney, D., Wadsworth, C., Green, D.I., Kennedy, S.L., Preziosi, R.F. and Brown, T.A. 2013. Extraction of inclusions from (sub)fossil resins, with description of a new species of stingless bee (Hymenoptera: Apidae: Meliponini) in Quaternary Colombian copal. Paleontological Contributions. 7 (May 2013), 1–6. DOI:https://doi.org/10.17161/PC.1808.11103.