What scientific name is the Black-backed dwarf kingfisher officially known by?

Ceyx erithaca

The Oriental Dwarf Kingfisher is officially recognized under the scientific designation Ceyx erithaca. This nomenclature is sometimes confused or debated due to the existence of distinct color variations. For instance, the rufous form, which displays a more overall pinkish-coral hue, is sometimes designated separately as Ceyx rufidorsa, leading to ongoing scientific discussion about whether it constitutes a subspecies or an entirely separate species entity. Despite these variations, Ceyx erithaca serves as the primary scientific identifier for the species being discussed, which is frequently referred to by common names like the Black-backed dwarf kingfisher.