| Species name | Common name | Distribution | Max. Length (cm) |
|---|---|---|---|
| Portlandia aestuariorum (Mosevich, 1928) |
Estuary yoldia | Northern Atlantic and the Arctic | |
| Portlandia arctica (Gray, 1824) |
Arctic yoldia | Arctic and Northern Atlantic | |
| Portlandia intermedia (Sars, 1865) |
Intermediate yoldia | Arctic, Northeast Pacific and Northern Atlantic | |
| Portlandia isonota (Martens, 1881) |
Kerguelen nut shell | Endemic to Kerguelen | |
| Portlandia minuscula (Verrill & Bush, 1898) |
Western Atlantic | 0.2 | |
| Portlandia pachia (Verrill & Bush, 1898) |
Western Atlantic | ||
| Portlandia pygmaea (Muenster, 1835) |
Western Atlantic |