| Synonym | Author | CoL Status | Valid | Synonymy | Combination |
|---|---|---|---|---|---|
| Caecum cayosense | Rehder, 1943 | synonym | No | junior synonym |
original combination |
| Caecum floridanum | Stimpson, 1851 | accepted name | Yes | senior synonym |
original combination |
| Caecum irregulare | Folin, 1867 | synonym | No | junior synonym |
original combination |
| Caecum phronimun | Folin, 1867 | synonym | No | junior synonym |
original combination |
| Caecum puntagordanum | Weisborg, 1962 | synonym | No | junior synonym |
original combination |
| Coecum floridanum | Stimpson, 1851 | synonym | No | senior synonym |
original combination |
| Elephantanellum cayosense | (Rehder, 1943) | synonym | No | junior synonym |
new combination |
| Micramellum floridanum | (Stimpson, 1851) | synonym | No | senior synonym |
new combination |
| Micranellum cayosense | (Rehder, 1943) | synonym | No | junior synonym |
new combination |