Aphaostracon
Aphaostracon is a genus of very small or minute freshwater snails in the family Cochliopidae that have an operculum.
Aphaostracon species are endemic to restricted areas in Florida, often to a single spring or spring run.
Species
This genus includes the following species:| Species | Common name | Range |
| Aphaostracon asthenes | Blue Spring hydrobe | Blue Spring |
| Aphaostracon chalarogyrum | freemouth hydrobe | Magnesia Springs in |
| Aphaostracon hypohyalinum | Suwannee hydrobe | Suwannee, Santa Fe, and Waccasassa rivers |
| Aphaostracon monas | Wekiwa hydrobe | Wekiwa Springs |
| Aphaostracon pachynotum | thick-shelled hydrobe | upper half of St. Johns River |
| Aphaostracon pycnum | dense hydrobe | Alexander Springs, Silver Glen Springs |
| Aphaostracon rhadinum | slough hydrobe | tributaries of lower St. Johns River |
| Aphaostracon theiocrenetum | Clifton Spring hydrobe | Clifton Springs |
| Aphaostracon xynoelictum | Fenney Spring hydrobe | Fenney Spring, in Sumter County |
One or more additional Aphaostracon species have been reported from springs in Florida, including Bugg Spring, De Leon Springs, and Green Springs. The snails from the three springs have not described in an authoritative publication, and it is not known if they belong to one, two, or three species.