The Green River Formation - Fossil Ecosystems of North America: A Guide to the Sites and their Extraordinary Biotas - page 184

length with their long dorsal fin (or
'bowfin'; 198) ; the sandfish, Notogoneus ;
the mooneye, Eohiodon ; the pickerel, Esox ,
a member of the pike family only discovered
in 1999; and the paddlefish, Crossopholis ,
the rarest of all the Green River fish possibly
due to its postcranial skeleton being

unossified cartilage ( 199 ). Finally Asineops
belongs to a family of uncertain origin,
possibly related to cave fish.

Amphibians and reptiles
Amphibians are rare, but include frogs
( 200 ), some with skin preserved, and an

198

198 The bowfin AmiaFBNM.
Length 1.2 m 4 ft.

199

199 The
paddlefish
Crossopholis
PC. Length
78 cm 2 ft 6 in.

200

200 A frog BHIGR. Length 6 cm 2.4 in.