ʒˈæŋ ˈɛt ˈæl. tˈuː θˈaʊzənd ɪlˈɛvən dʒˈeɪ. zˌɪndʒjɑːndʒˈɛnsɪs ɪz nˈoʊn fɹʌmðɪ ˈɜːli dʒjʊɹɹˈæsɪk saɪnmjˈʊɹɹiən bˈædeɪˌɑːwən fɔːɹmˈeɪʃən ʌv zˈɪndʒjɑːŋ, tʃˈaɪnə, wˌaɪl dʒˈeɪ. sˈɪmplɛks ɪz nˈoʊn fɹʌmðə mˈɪdəl dʒjʊɹɹˈæsɪk dˈeɪəhjˌuːɡuː bˈɛdz ʌv ˈɪnɚ mɔŋɡˈoʊliə, tʃˈaɪnə.
Zhang et al. 2011  J. xinjiangensis is known from the Early Jurassic (Sinemurian) Badaowan Formation of Xinjiang, China, while J. simplex is known from the Middle Jurassic Daohugou Beds of Inner Mongolia, China.