''Swiftopecten djoserus '''(Yoshimura, 2017) is an extinct species of bivalve belonging to the subclass Pteriomorphia and family Pectinidae that lived during the Late Pliocene, approximately 2.75 Ma. Their two valves have step-like growth ribs.

Origin of scientific name

The species name comes from the Pyramid of Djoser in Saqqara, Egypt; the commarginal constrictions of ''Swiftopecten djoserus'' resemble the unique stepwise form of this pyramid.

References

* Yoshimura, Taro (2017). “A New Pliocene Species of Swiftopecten (Bivalvia: Pectinidae) from the Zukawa Formation in Toyama Prefecture, Central Japan”. Paleontological Research 21 (3): 293–303. {{Taxonbar, from=Q33656451 Pectinidae Prehistoric bivalves Molluscs described in 2017