On the identity of Oocephalus lythroides (Hyptidinae, Lamiaceae): a new combination in the genus Cantinoa

ABSTRACT The name Hyptis lythroides was published in early 1800, attached to a specimen member of H. sect. Polydesmia, collected in Central Goiás, Brazil. After some adjustments, generic in Hyptis and subtribal in Hyptidinae over the last 70 years, this species was recently transferred to the genus Oocephalus. For years, this name was mistakenly assigned to a species commonly found in the Cerrado of Distrito Federal and eastern Goiás, which turned out to be a distinct species, Oocephalus grazielae. Here, we propose a new combination for the name Oocephalus lythroides under the genus Cantinoa, based on morphological features and redefinition of the species limits. Additionally, a second step lectotypification is proposed.