1. Subspecies Unio batavus hexameri F. Haas, 1912 accepted as Unio crassus Philipsson, 1788 (a junior synonym)
2. Subspecies Unio batavus kobeltianus F. Haas, 1913 accepted as Unio crassus Philipsson, 1788 (junior synonym)
3. Subspecies Unio batavus palatinus F. Haas, 1912 accepted as Unio crassus Philipsson, 1788 (a junior synonym)
4. Subspecies Unio batavus probavaricus F. Haas, 1912 accepted as Unio crassus Philipsson, 1788 (a junior synonym)
5. Variety Unio batavus var. albensis Hazay, 1885 accepted as Unio nanus Lamarck, 1819 (unaccepted > junior subjective synonym)
6. Variety Unio batavus var. belgicus Colbeau, 1868 accepted as Unio crassus Philipsson, 1788 (a junior synonym)
7. Variety Unio batavus var. incurvatus Colbeau, 1868 accepted as Unio crassus Philipsson, 1788 (a junior synonym)
8. Variety Unio batavus var. ondovensis Hazay, 1884 accepted as Unio crassus Philipsson, 1788 (unaccepted > junior subjective synonym)
9. Variety Unio batavus var. ponderosa Wattebled, 1889 accepted as Unio crassus Philipsson, 1788 (unaccepted > junior subjective synonym)
10. Variety Unio batavus var. rivularis Moquin-Tandon, 1856 accepted as Unio rivularis Moquin-Tandon, 1856 accepted as Unio crassus Philipsson, 1788 (original rank)
11. Variety Unio batavus var. rufescens Wattebled, 1889 accepted as Unio crassus Philipsson, 1788 (unaccepted > junior subjective synonym)

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