ðə tɹɐdˈɪʃənəl spˈiːsiːz ʌv dʒˌiːoʊsˈɔːɹəs, dˌækəsˈɔːɹəs ænd kɹˌɪkəsˈɔːɹəs wɜː fˈaʊnd tə ɹˌɛpɹᵻzˈɛnt ʌnnˈætʃɚɹəl ɡɹˈuːps, ænd ðə spˈiːsiːz tɹɐdˈɪʃənəli klˈæsᵻfˌaɪd ɪn ðiːz dʒˈɛnɚɹə wɜː ɹᵻʃˈʌfəld ɪn ɐ stˈʌdi pˈʌblɪʃt ɪn noʊvˈɛmbɚ tˈuː θˈaʊzənd nˈaɪn baɪ mˈɑːɹk tˈiː. jˈʌŋ ænd mˈɑːɹkoʊ bɹˈændəlˌaɪz də ˈændɹeɪd.
The traditional species of Geosaurus, Dakosaurus and Cricosaurus were found to represent unnatural groups, and the species traditionally classified in these genera were reshuffled in a study published in November 2009 by Mark T. Young and Marco Brandalise de Andrade.