Amphiplaga
brachyptera
Order Percopsiformes,
Family Percopsidae
Geological
Time: Eocene
Size: Fish
fossil is 3” in length on a small plate
Fossil Site:
Green River Formation, Kemmerer, Wyoming
Fossil Code:
PFF465
Price: Sold
Description:
This is a well-preserved specimen of this uncommon species. This
one exhibits the skin pattern. Amphiplaga are one of the less common
Green River fish fossils, making up some 1% of the total from Fossil
Lake, its only known location. Named by the famous 19th Century
paleontologist E.D. Cope, the name Amphiplaga is thought to mean "ambiguous
wound", pointing to the fact that the holotype specimen was
headless. Shaped rather like a cross between a trout and a perch,
the Percopsidae are colloquially termed “trout perches”.
Fossil percopsids are only known from North America, the current
home of the extant genus Percopsis. With a maximum total length
of 6” and an average of less than 4”, this is a mature
adult specimen.
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