| Nominal Species (n = 30) | Present allocation (n = 25) | Ref. |
|---|---|---|
| Lyonsia alvarezii d'Orbigny, 1846 | Lyonsia alvarezii | 83435 |
| Lyonsia arcaeformis Martens, 1885 | Lyonsia arcaeformis | 3477 |
| Pandorina arenosa Möller, 1842 | Lyonsia arenosa | 83435 |
| Lyonsia argentea Jeffreys, 1881 | Lyonsia argentea | 19 |
| Lyonsia avicularis Kurtz, 1860 | Lyonsia avicularis | 83435 |
| Lyonsia bulla Dall, 1881 | Lyonsia bulla | 19 |
| Lyonsia californica Conrad, 1837 | Lyonsia californica | 19 |
| Entodesma chilensis Philippi, 1845 | Entodesma cuneata | 3477 |
| Entodesma elongatulum Soot-Ryen, 1957 | Entodesma elongatulum | 83435 |
| Mytilimeria falklandica Preston, 1913 | Mytilimeria falklandica | 83435 |
| Lyonsia floridana Conrad, 1849 | Lyonsia floridana | 19 |
| Lyonsia formosa Jeffreys, 1881 | Lyonsia formosa | 19 |
| Lyonsia fretalis Dall, 1915 | Entodesma fretalis | 3477 |
| Lyonsia gibbosa Hancock, 1846 | Lyonsia arenosa | 75097 |
| Lyonsia gouldii Dall, 1915 | Lyonsia gouldii | 19 |
| Lyonsia granulifera Verrill & Bush, 1898 | Lyonsia granulifera | 19 |
| Lyonsia haroldi Dall, 1915 | Lyonsia californica | 75097 |
| Lyonsia hyalina Conrad, 1831 | Lyonsia hyalina | 19 |
| Mya hyalina Conrad, 1831 | Lyonsia hyalina | 83435 |
| Lyonsia kawamurai Habe, 1952 | Lyonsia kawamurai | 3477 |
| Lyonsia lucasana Bartsch & Rehder, 1939 | Lyonsia lucasana | 19 |
| Lyonsia magnifica Dall, 1913 | Lyonsia magnifica | 19 |
| Lyonsia malvinensis d'Orbigny, 1846 | Lyonsia malvinensis | 83435 |
| Lyonsia nesiotes Dall, 1915 | Lyonsia californica | 75097 |
| Mytilimeria nuttalli Conrad, 1837 | Mytilimeria nuttalli | 19 |
| Lyonsia patagonicum d'Orbigny, 1846 | Entodesma patagonicum | 83435 |
| Lyonsia pugetensis Dall, 1913 | Lyonsia pugetensis | 19 |
| Lyonsia sibirica Leche, 1883 | Lyonsia arenosa | 75097 |
| Lyonsia ventricosa Gould, 1861 | Lyonsia ventricosa | 77824 |
| Entodesma weisbordi Macsotay & Campos, 2001 | Entodesma weisbordi | 83435 |