Populations of the Butterfish, Poronotus triacanthus (Peck), with Systematic Comments
Examination of large series of butterfish from throughout their range revealed three major populations: a deep-bodied form in the Gulf of Mexico; an intermediate form in Western Atlantic waters of 12 fathoms or less south of Cape Hatteras; and a generally shallow-bodied form in Western Atlantic waters north of Hatteras and south of Hatteras beyond 13 fathoms. Peprilus burti Fowler is placed in the synonymy of Poronotus triacanthus (Peck).
Caldwell, David C.
"Populations of the Butterfish, Poronotus triacanthus (Peck), with Systematic Comments,"
Bulletin of the Southern California Academy of Sciences:
Available at: http://scholar.oxy.edu/scas/vol60/iss1/4