| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Acar abdita Oliver & Chesney, 1994 |
Western Indian Ocean | ||
| Acar albidum Sakurai & Habe, 1966 |
Northwest Pacific | ||
| Acar bailyi Bartsch, 1931 |
Miniature ark | Eastern Pacific and Western Central Atlantic | |
| Acar cometa (Reeve, 1844) |
Western Central Pacific | ||
| Acar congenitum (Smith, 1885) |
Western Pacific | ||
| Acar congenitus (Smith, 1885) |
Western Central Pacific | ||
| Acar domingensis (Lamarck, 1819) |
White miniature ark | Western Atlantic | 2.12 |
| Acar marsupialis Oliver & Holmes, 2004 |
Rodriguez only | 0.221 | |
| Acar petasion Kilburn, 1983 |
Western Indian Ocean | ||
| Acar plicata (Dillwyn, 1817) |
Indo-Pacific and the Mediterranean Sea | 0.38 | |
| Acar requiescens (Melvill & Standen, 1907) |
Western Indian Ocean | ||
| Acar revelata (Deshayes, 1863) |
Western Indian Ocean | 5.31 | |
| Acar sandersonae Powell, 1933 |
Southwest Pacific | ||
| Acar sociella (Brookes, 1926) |
Southwest Pacific | ||
| Acar transmar Simone, 2009 |
Western Atlantic | 0.55 |