| Nominal Species (n = 12) | Present allocation (n = 12) | Ref. |
|---|---|---|
| Microarthridion berberum Monard | Microarthridion berberum | 19 |
| Cithadius cyathurae Bowman, 1972 | Cithadius cyathurae | 19 |
| Tachidius discipes Giesbrecht, 1881 | Tachidius discipes | 19 |
| Microarthridion fallax Perkins, 1956 | Microarthridion fallax | 19 |
| Tachidius incisipes Klie, 1913 | Tachidius incisipes | 19 |
| Microarthridion litospinatus Shen & Tai, 1973 | Microarthridion litospinatus | 19 |
| Tachidus littoralis Poppe, 1881 | Microarthridion littorale | 75097 |
| Microarthridion perkinsi Bodin, 1970 | Microarthridion perkinsi | 19 |
| Tachidius recuctum Monard, 1935 | Microarthridion reductum | 75097 |
| Tachidius spitzbergensis Oloffson, 1917 | Tachidius spitzbergensis | 19 |
| Tachidius triangularis Shen & Tai, 1963 | Neotachidius triangularis | 19 |
| Tachidius vicinospinalis Shen & Tai, 1964 | Sinotachidius vicinospinalis | 84395 |