Leptecodon

{{Short description|Extinct genus of fishes}}

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| taxon = Leptecodon rectus

| authority = Williston, 1899

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{{refimprove|date=February 2025}}

Leptecodon (meaning "small tooth") is a genus of prehistoric ray-finned fish which was described by Williston in 1899 and was possibly preyed on by other sea creatures.{{cite book |author= |date=1900 |title=Reports: Volume 6 |url=https://www.google.com/books/edition/Reports/gPziAAAAMAAJ |publisher=Kansas Geological Survey |page=380-382 |access-date=February 16, 2025}} However, it was a hunter of smaller creatures itself. This fish sometimes hid in clams such as Inoceramus. The first-discovered fossil was inside a clam. Many believe that Leptecodon had formed a symbiotic relationship with the clam rather than get eaten by Inoceramus. Another fish from the same time and place, Caproberyx, has also been found among Inoceramus.