Table 1 Geological distribution of the known fossil species of Omma
Age | Species | Location and horizon | Reference |
|---|---|---|---|
K1 | O. sibiricum Ponomarenko, 1966 | Baissa, West Transbaikalia Russia; Zazinskaya Fm. | Ponomarenko, 1966 |
O. antennatum Ponomarenko, 1997 | Bon-Tsagan, Mongolia; Khurilt sequence | Ponomarenko, 1997 | |
O. gobiense Ponomarenko, 1997 | Khoutiin-Khotgor, Mongolia; Ulan-Ereg Fm. | Ponomarenko, 1997 | |
O. brevipes, Deichmüller, 1886 | Solnhofener, German; Solnhofener Fm. | Deichmüller, 1886 | |
O. zitteli Oppenheim, 1888 | Solnhofener, German; Solnhofener Fm. | Oppenheim, 1888 | |
J3-K1 | O. pilpsim Ponomarenko, 1964 | Karatau, Kazakhstan; Karabastau Fm. | Ponomarenko, 1964 |
O. aberratum Ponomarenko, 1968 | Karatau, Kazakhstan; Karabastau Fm. | Ponomarenko, 1968 | |
O. jurassicum Ponomarenko, 1968 | Karatau, Kazakhstan; Karabastau Fm. | Ponomarenko, 1968 | |
J2-J3 | O. altajense Ponomarenko, 1997 | Bakhar, Mongolia; Togo-Khuduk sequence | Ponomarenko, 1997 |
O. delicata sp. nov. | Daohugou, Inner Mongoliia Jiulongshan Fm. | this study | |
J1 | O. avus Ponomarenko, 1969 | Issyk-Kul’, Kyrgyzstan; Dgil’skaya Fm. | Ponomarenko, 1969 |
J1-T3 | O. liassicum Crowson, 1962 | Brown’s wood, Warwickshire, England; Rhaetian Age. | Crowson, 1962 |