| Nominal Species (n = 23) | Present allocation (n = 21) | Ref. |
|---|---|---|
| Hemicyclops americanus Wilson, 1932 | Hemicyclops adhaerens | 75097 |
| Hemicyclops arenicolae Gooding, 1966 | Hemicyclops arenicolae | 19 |
| Hemicyclops australis Nicholls, 1944 | Hemicyclops australis | 19 |
| Hemicyclops callianassae Wilson, 1935 | Hemicyclops thysanotus | 75097 |
| Hyphalion captans Humes, 1987 | Hyphalion captans | 8774 |
| Hemicyclops dilatatus Shen & Bai, 1956 | Hemicyclops dilatatus | 19 |
| Clausidium dissimile Wilson, 1921 | Clausidium dissimile | 19 |
| Hemicyclops elongatus Wilson, 1937 | Hemicyclops elongatus | 19 |
| Hemicyclops indicus Sewell, 1949 | Hemicyclops indicus | 19 |
| Hemicyclops intermedius Ummerkutty, 1961 | Hemicyclops intermedius | 19 |
| Pholadicola intestinalis Ho & Wardle, 1992 | Pholadicola intestinalis | 19 |
| Hemicyclops mortoni Boxshall & Humes, 1987 | Hemicyclops mortoni | 3477 |
| Leptinogaster pholadis Pelseneer, 1929 | Leptinogaster pholadis | 19 |
| Hemicyclops pugettensis Light & Hartman, 1937 | Hemicyclops thysanotus | 75097 |
| Hemicyclops purpureus Boeck, 1872 | Hemicyclops purpureus | 19 |
| Hemicyclops rapax Lee, Chang & Kim, 2022 | Hemicyclops rapax | 3477 |
| Hemicyclops subadhaerens Gooding, 1960 | Hemicyclops subadhaerens | 19 |
| Hemicyclops tamilensis Thompson & Scott, 1903 | Hemicyclops tamilensis | 19 |
| Clausidium tenax Humes, 1949 | Clausidium tenax | 19 |
| Hemicyclops thalassius Vervoort & RamÃrez, 1966 | Hemicyclops thalassius | 3477 |
| Hemicyclops thysanotus Wilson, 1935 | Hemicyclops thysanotus | 19 |
| Saphirella tropica Wolfenden, 1906 | Saphirella tropica | 19 |
| Hemicyclops visendus Humes, Cress., & Good., 1958 | Hemicyclops visendus | 19 |