The species is found in a very small area of Mexico and is of particular importance due to its relict nature and uncertain relationship to other subfamilies such as the Parnassiinae. It is now considered to represent the monotypic subfamily Baroniinae. The butterfly is considered as the most primitive extant papilionid taxon and shares some features with the fossil taxon Praepapilio.
Morphological characteristics include an abdominal scent organ in females.Häuser, C. L. 1992. A new abdominal scent organ in females of Baronia brevicornis (Lepidoptera: Papilionidae). Zoologischer Anzeiger 229(1/2):54-62.
The distribution of the species in Mexico is patchy and restricted.Llorente-Bousquets, J & A. Luis-Martinez (1993) Conservation-oriented analysis of Mexican butterflies: Papilionidae (Lepidoptera, Papilionoidea). In Ramammorthy, T.P., J. Fa, R. Bye y A. Lot (Eds.). 1993. The biological... Read More