Branchioplax washingtonensis Fossil Crab – Upper Oligocene | Hoko River Formation, Clallam County, Washington, USA

A fossil crab, Branchioplax washingtonensis, from the upper Oligocene Hoko River Formation, Clallam County, Washington State, USA. This specimen is approximately 25 million years old, preserved from a time when warm, shallow marine waters lapped the ancient Pacific coastline of North America.

Branchioplax washingtonensis is a brachyuran crab known from the Oligocene of the Pacific Northwest, and the Hoko River Formation is one of the key fossil-bearing units of the region, yielding a diverse assemblage of marine invertebrates. Fossil crabs of this quality and provenance are seldom encountered on the collector market, making this a genuinely uncommon and desirable specimen.

A fine addition to any collection focused on Cenozoic marine life, Pacific Northwest palaeontology, or fossil crustaceans.

• Species: Branchioplax washingtonensis (fossil crab)
• Age: Upper Oligocene (~25 million years old)
• Formation: Hoko River Formation
• Locality: Clallam County, Washington, USA
• Condition: Fossil, natural preservation