''Portlandia'' is a genus of marine bivalve mollusks in the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Yoldiidae. They can be found in all the oceans. The genus includes '' Portlandia arctica'', the bivalve which gave its name – when it was still known as '' Yoldia arctica'' – to the

Yoldia Sea Yoldia Sea is a name given by geologists to a variable brackish water stage in the Baltic Sea basin that prevailed after the Baltic Ice Lake was drained to sea level during the Weichselian glaciation. Dates for the Yoldia sea are obtained mainly ...

Species

There are six recognized species:

References

Yoldiidae Bivalve genera Taxa named by Otto Andreas Lowson Mörch {{bivalve-stub