†Portlandia (Portlandia) Mörch 1857 (clam)
Bivalvia - Nuculanida - Sareptidae
Parent taxon: Portlandia according to E. J. Moore 1983
See also Moore 1984
Sister taxa: Portlandia arctica, Portlandia chehalisensis, Portlandia glacialis, Portlandia impressa, Portlandia kakimii, Portlandia laudabilis, Portlandia rosa, Yoldia (Portlandia) cooperii
Subtaxa: Portlandia (Portlandia) markleyensis Portlandia (Portlandia) mortuasusensis Portlandia (Portlandia) mosesi Portlandia (Portlandia) packardi
Ecology: facultatively mobile infaunal deposit feeder
Distribution:
• Miocene of Indonesia (1 collection)
• Oligocene of United States (2: Washington)
• Eocene of Japan (1), United States (5: California)
Total: 9 collections each including a single occurrence