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In review:


Ramírez SR, DW Roubik, C Skov, NE Pierce.  Phylogeny, biogeography and and diversification of the orchid bees (Hymenoptera: Euglossini). In review: Biological Journal of the Linnean Society.


In press:


13. Ramírez SR. (In press) Quick guide: Orchid bees. Current Biology


Published:


12. Zimmermann, Y,  SR Ramírez, T Eltz (2009) Chemical niche differentiation among sympatric orchid bees. Ecology 90(11): 2994-3008. [PDF]     cover feature


11. Singer, RB, B Gravendeel, H Cross, SR Ramírez (2008) Structural variation, taxonomic utility and evolutionary patterns of orchid pollinia. Selbyana 29(1): 6–19.[PDF]


10. Ramírez, SR, B Gravendeel, RB Singer, CR Marshall, NE Pierce (2007) Dating the origin of the Orchidaceae from a fossil orchid with its pollinator. Nature 448:1042-1045 [PDF | suppl_mat. | Media ]     cover feature

  1. 9.Ramírez, S (2006) Euglossa samperi n. sp., a new species of orchid bee from the Ecuadorian Andes (Hymenoptera:Apidae). Zootaxa 1272: 61-68. [PDF]


7. Parra-H A, R Ospina-Torres, S Ramírez (2006) Euglossa natesi, a new species of orchid bee from the Chocó Region of Colombia and Ecuador (Hymenoptera: Apidae). Zootaxa 1298: 29-36. [PDF]


7. Ramírez, S (2005) Euglossa paisa, a new species of orchid bee from the Colombian Andes (Hymenoptera: Apidae). Zootaxa 1065: 51-60. [PDF]


6. Nieh, JC, FAL Contreras, S Ramírez, VL Imperatriz-Fonseca (2003) Variation in the communication of resource height by stingless bees from different habitats Animal Behaviour 66: 1129–1139. [PDF]


5. Nieh, JC, S Ramírez, P Nogueira-Neto (2003) Multi-source odor-marking of food by a stingless bee, Melipona mandacaia Behavioral Ecolology and Sociobiology 54: 578-586. [PDF]


4. Ramírez, S, SA Cameron (2003) Army ant attacks by Eciton hamatum and E. rapax on nests of the Amazonian bumble bee, Bombus transversalis (Hymenoptera: Apidae) Journal of the Kansas Entomological Society 76 (3): 533-535. [PDF]


3. Ramírez, S, RL Dressler, M Ospina (2002) Euglossine bees (Hymenoptera: Apidae) from the Neotropical Region: A species checklist with notes on their biology Biota Colombiana 3 (1): 7-118. [PDF]

2. Cameron, SA & S Ramírez (2001) Nest architecture and nesting ecology of the orchid bee Eulaema meriana (Hymenoptera: Apinae: Euglossini) Journal of the Kansas Entomological Society 74 (3): 142-165. [PDF]


1. Whitfield, JB, SA Cameron, S Ramírez, K Roesch, S Messinger, OM Taylor & D Cole (2001) Review of the Apanteles species (Hymenoptera: Braconidae) attacking Lepidoptera in Bombus (Hymenoptera: Apidae) colonies in the New World, with Description of a New Species from South America. Annals of the Entomological Society of America 94 (6): 851-857. [PDF]