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| Family | Age (Year) | Species |
|---|---|---|
| Argissidae | 147 | Argissa hamatipes (Norman, 1869) |
| Baikalogammaridae | 142 | Baikalogammarus pullus (Dybowsky, 1874) |
| Dairellidae | 131 | Dairella californica (Bovallius, 1885) |
| Giniphargidae | 117 | Giniphargus pulchellus (Sayce, 1899) |
| Prolanceolidae | 109 | Prolanceola vibiliformis Woltereck, 1907 |
| Tryphanidae | 145 | Tryphana malmii Boeck, 1871 |
