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 spec. Pierella (teste Warren 2015) Nymphalidae : Satyrinae : Haeterini : Pierella . Colombia , Santander Department , copal; Holocene/Pleistocene Depository: FMNH. The specimen is a remarkably well-preserved fossil, so much that A.D. Warren (pers. comm.), who saw the specimen in July, 2015, thought it was a fake. According to Warren it exactly resembles the extant Pierella helvina Hewitson ( Nymphalidae : Satyrinae ), which is distributed from Nicaragua to Ecuador with Colombia being the type locality, except for the reddish color of the extant species. However, the fossil has not yet been studied in detail. In view of the young age of the fossil it is of little interest for calibration of the molecular clock, except for the evolution within the genus Pierella .