Second, the exact relationship between the suspected sister taxa L. clemenciae and L. amethystinus, the northernmost species, is not as straightforward as assumed; it is not clear whether they are each other's close relatives or whether the blue-throated hummingbird is the oldest lineage of the genus, the amethyst-throated hummingbird diverging later.
The relationship between *L. clemenciae* and *L. amethystinus*, the northernmost species, is unclear; it's not certain whether they are closely related or if the blue-throated hummingbird is the oldest lineage of the genus, with the amethyst-throated hummingbird diverging later.