| Plakina Schulze, 1880 |
| Plakina muricyae Cruz-Barraza, Vega & Carballo, 2014 |
| Plakina paradilopha Cruz-Barraza, Vega & Carballo, 2014 |
| Plakinastrella Schulze, 1880 |
| Plakinastrella onkodes (Uliczka, 1929) |
| Plakinidae Schulze, 1880 |
| Plakortis Schulze, 1880 |
| Plakortis albicans Cruz-Barraza & Carballo, 2005 |
| Plakortis angulospiculatus (Carter, 1879) |
| Plakortis clarionensis Cruz-Barraza, Vega & Carballo, 2014 |
| Plakortis halichondrioides (Wilson, 1902) |
| Plakortis zyggompha (Laubenfels de, 1934) |
| Roosa Laubenfels de, 1934 |
| Roosa zyggompha Laubenfels de, 1934 |