Soszyńska-Maj, et al., 2016 Known from the Early Jurassic, Sinemurian aged Charmouth Mudstone Formation of Dorset, England, is currently considered to be one of the oldest members of the family.
sˈɑːszɪnskəmˈædʒ, ˈɛt ˈæl., tˈuː θˈaʊzənd sˈɪkstiːn nˈoʊn fɹʌmðɪ ˈɜːli dʒjʊɹɹˈæsɪk, saɪnmjˈʊɹɹiən ˈeɪdʒd tʃˈɑːɹməθ mˈʌdstoʊn fɔːɹmˈeɪʃən ʌv dˈoːɹsɛt, ˈɪŋɡlənd, ɪz kˈɜːɹəntli kənsˈɪdɚd təbi wˈʌn ʌvðɪ ˈoʊldɪst mˈɛmbɚz ʌvðə fˈæmɪli.