2521 Lethenteron appendix (DeKay, 1842) Petromyzontidae Northern lampreys Lampetrinae Petromyzontiformes Petromyzonti American brook lamprey North America: Canada and USA: Lake Superior Basin, Michigan; Lake Michigan Basin, Michigan (Carp Lake, Betsie, Pine, and Pentwater rivers) and Indiana; Lake Huron Basin, Michigan; Lake Erie Basin, Ontario and Michigan; Lake Ontario Basin, Ontario and New York; Mississippi River Basin, Minnesota, Missouri, Pennsylvania, Kentucky, Tennessee, and Alabama; St. Lawrence River Basin, Québec and New York; Atlantic Slope basins, New Hampshire, Massachusetts, Connecticut, New York, New Jersey, Pennsylvania, Delaware, Maryland, and Virginia (Ref. 89241). Two subspecies <i>Lethenteron appendix appendix</i> and i>L. appendix wilderi</i> were recognized, but ranges poorly understood (Ref. 86798). AMNH 55643 Lampetra appendix ZMH 10084 1901 Petromyzon appendix AMNH 3280 1911 Lampetra wilderi AMNH 15553 1913 Lampetra appendix AMNH 8844 1913 Lampetra wilderi GCRL 17196 1952 Lampetra appendix AMNH 63382 1961 Lampetra appendix AMNH 64046 1962 Lampetra appendix AMNH 64048 1962 Lampetra appendix AMNH 62435 1966 Lampetra appendix AMNH 36713 1976 Lampetra appendix AMNH 50909 1976 Lampetra appendix AMNH 50914 1976 Lampetra appendix AMNH 226727 1981 Lampetra appendix AMNH 226763 1981 Lampetra appendix AMNH 223453 1982 Lampetra appendix AMNH 55424 1983 Lampetra appendix AMNH 49551 1984 Lampetra appendix AMNH 49552 1984 Lampetra appendix GCRL 17197 1992 Lampetra appendix AMNH 215886 1996 Lampetra appendix