Phareodus testis, unrestored specimen
Eocene (52.3 Million Years Ago)
Green River Formation, Wyoming, USA
In Stone Fossils Private Quarry
Plate size approx: 7.5" x 7.75"
Phareodus size approx: 5.25"
This Phareodus testis, smaller than it's Phareodus encaustus counterpart, was a predator in ancient Fossil Lake. Featuring pointy teeth a long pectoral fin. and natural shifting of the scales during decomposition. Also a natural fault in the rock that travels through the phareodus anal fin, that has since healed over many thousands of years ago.
This specimen was so well preserved, no restorative practices were necessary and was left exactly the way it was found after a fine layer of matrix was removed by microscopic fossil preparation.
Bony-Tongue Fish - 2 Species Identified: Phareodus encaustus & Phareodus testisOrder Osteoglossiformes, Family Osteoglossidae
Living members of the Osteoglossidae family:
- include 10 modern species
- live exclusively in tropical freshwaters
- found in South America, Africa, Asia, and Australia
- mouth-brooders (parents hold eggs and hatchlings in their mouths)
- adult specimens usually found alone, but juveniles known from mass mortalities
- indicates that Phareodus schooled as a juvenile and became solitary as an adult
- often preserved with smaller fish in their jaws and stomach, indicating they were predators
- rearward oriented fins on back and underside, adaptation for speed
- large, sharp teeth
- max known size of P. encaustus: 30 inches
- max known size of P. testis: 20 inches
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