Morphometric and genetic analyses differentiate Mesoamerican populations of the endangered stingless bee Melipona beecheii (Hymenoptera: Meliponidae) and support their conservation as two separate units

1. de J. May-Itzá, W.
2. Quezada-Euán, J.J.G.
3. Ayala, R.
4. de la Rúa, P.