Fossil butterflies, calibration points and the molecular clock (Lepidoptera: Papilionoidea) Author Jong, Rienk De text Zootaxa 2017 4270 1 1 63 journal article 32975 10.5281/zenodo.583183 6c479acc-8b18-4f0b-a6e5-85bcd6d7b6b7 1175-5326 583183 2D00AFF5-4FE2-4EC1-A328-C8670CFB8D6D florissantensis . Oligodonta florissantensis Brown, 1976 Fig. 8. Nymphalidae : Libytheinae . USA , Colorado , Florissant; late Priabonian, late Eocene. Depository: FFNM (holotype). Published figures: Brown (1976: Figs 1–3 ) ; Emmel et al . (1992 : Fig. 1 /2, and at back of color plate III); Kawahara (2013: Fig. 62) . For a good description and interpretation of the fossil, see Kawahara (2013) .This author synonymized it with Barbarothea florissanti (see below) and placed it in the extant genus Libytheana (Nymphalidae) , see description below. It was placed in the Pieridae by Brown (1976) (followed by Emmel et al . 1992 ), because of the unjustly supposed similarity with Leodonta . Subsequently, Braby et al . (2006) used the fossil as calibration point on the phylogenetic tree of the Pieridae as a close relative of the Catasticta group, if not the genus Leodonta .