Other Amphibian of the Week

Southern Dwarf Siren (Pseudobranchus axanthus)

photo by USGS


Common Name: Southern Dwarf Siren
Scientific Name: Pseudobranchus axanthus
Family: Sirenidae
Location: United States – Florida
Size: 10 inches or 25 cm max

The Southern Dwarf Siren is only found in Florida. Just like all Sirens, they lack hind legs and just like other Dwarf Sirens, they only have 3 toes on their feet.

There are two different subspecies of Southern Dwarf Siren. The first is the Everglades Dwarf Siren (P. a. belli) which can be distinguished by it’s 29-33 costal grooves while the other subspecies Narrow-Striped Dwarf Siren (P. a. axanthus) that has 34-37 costal grooves.

Courtship and mating still have not been observed for the species but the fertilization is presumed to be internal.

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