Relevant and distinctive vernacular species names are essential to assure efficient communication among scientists under field and laboratory conditions, but also among non-specialists including the public at large. We provide a rationale for recommended vernacular and alternative names for the lesser beaked whale Mesoplodon peruvianus Reyes, Mead & Van Waerebeek, 1991 in 11 major world languages which encompass most of cetacean literature. Principal criteria for name endorsement are unambiguity and nonrepetitiveness with respect to other aquatic mammal species.
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