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Amphiplaga is one of the rarer of the Green River fish fossils, making up some 1% of the total from Fossil Lake, its only known location. Amphiplaga belongs together with its close relative Erismatopterus to the family Percopsidae within the order Percopsiformes. Amphiplaga is best distinguished from Erismatopterus by its dorsal fin, which has three hard spines (the first one is very small) followed by 9 or 10 soft rays. Erismatopterus usually has two hard spines followed by 6 or 7 soft spines. Amphiplaga can reach up to 15cm with an average length of about 10cm while Erismatopt
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From the album: Vertebrates
Erismatopterus levatus (COPE, 1870) Middle Eocene Green River Formation Lake Gosiute Wyoming USA Length 3.2" / 9 cm-
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What is up with Lake Gosiute and Sweet Water Wyoming?
Mioplosus_Lover24 posted a topic in Questions & Answers
I am wondering why Lake Gosiute has been closed off to the public. It is the only part of fossil lake that has catfish and I really want to try and find one, instead of paying thousands of dollars for one. I have heard it was bought by a company, but I was still wondering if they would let a small private team dig or if they would sell any of the fossils. Thanks for any help! -
Astephus and Hypsidoris are both members of the Family Ictaluridae, native to North America. Green River catfish are easily recognized by their stout dorsal and pectoral spines, scale less bodies and broad skull. Ictalurid species have four pairs of barbels (or whiskers). Like modern catfish, they possessed a vibration sensitive organ called the Weberian apparatus. The Weberian apparatus consists out of specialized vertebrae at the front of the spinal column which passed vibrations to the inner ear using the swim bladder as a resonance chamber. The structure essentially acts as an amplifier o
