Taxonomy
There has been debate and differing opinion as to the correct classification of the pygmy and dwarf sperm whales (see sperm whale family for details). The two were widely considered to be the same species, until 1966, when a scientist at the Smithsonian Institution definitively identified them as separate species. The pygmy sperm whale was first named by Henri Marie Ducrotay de Blainville in 1838.
Read more about this topic: Pygmy Sperm Whale