The Sapphire-bellied Hummingbird has been regarded as a race of L. coeruleogularis, but both have been taken at the same location in Cienaga Grande, Colombia (Hilty and Brown 1986).
Luther, D. (2009). Sapphire-bellied Hummingbird (Lepidopyga lilliae), version 1.0. In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/nb.sabhum1.01