- Order Odontoceti (toothed whales)
- Family Squalodontidae (Brandt, 1872)
- Squalodon calvertensis Kellogg, 1923 (Calvert)
- Squalodon cf. S. tiedemani Allen, 1887 (Calvert)
- Family Platanistidae (river dolphins)
- Zarhachis flagellator Cope, 1868 (See Kellogg, 1924 and Kellogg, 1926) (Calvert)
- Zarhachis sp. or Pomatodelphis inaequalis Allen, 1921 (Calvert, Choptank)
- Zarhachis sp. (St. Mary's)
- Family Rhabdosteidae
- Eurhinodelphis bossi Kellogg, 1925 (Calvert)
- Rhabdosteus latiradix, Cope, 1867? (Calvert)
- Family Squalodelphidae
- Phocageneus venustus Leidy, 1869 (Calvert)
- Notocetus sp. (Muizon, 1987) (Calvert)
- Family Kentriodontidae (Slijper, 1936)
- (Kentriodon opscurus Kellogg, 1927)
- Kentriodon pernix Kellogg 1927 (Calvert)
- "Delphinodon" dividum True, 1912 (Calvert)
- Liolithax pappus Kellogg, 1955 (Calvert)
- Macrokentriodon morani Dawson, 1996 (Choptank)
- Hadrodelphis calvertense Kellogg, 1966 (See Dawson, 1996a) (Calvert, Choptank?)
- Lophocetus calvertensis Harlan, 1842 (St. Mary's)
- Kentriodontid indet. (Choptank, St. Mary's, Eastover)
- Family Physeteridae (Sperm whales)
- Orycterocetus crocodilinus Cope, 1867? (See Kellogg, 1965) (Calvert, Choptank)
- Orycterocetus mediatlanticus Cope 1895 (St. Mary's)
- Physterid indet. (St. Mary's)
- Family Ziphiidae (beaked whales)
- Ziphiid indet. (Choptank ?)
- Odonteceti incertae sedis
- Tretosphys gabbi Cope 1868? (Calvert)
- Araeodelphis natator (Calvert)
- Pelodelphis gracilis (Calvert)
- Family Squalodontidae (Brandt, 1872)
- Order Mysticeti (baleen whales)
- Family "Cetotheriidae"
- Parietobalaena palmeri Kellogg, 1924 (See also Kellogg, 1968) (Calvert)
- Mesocetus siphunculus Cope, 1895 (See Kellogg 1968) (Calvert)
- Diorocetus hiatus Kellogg, 1968 (Calvert, Choptank)
- Aglaocetus patulus Kellogg, 1968 (Calvert, Choptank)
- Pelocetus calvertensis Kellogg, 1965 (Calvert, Choptank)
- Thinocetus arthritus Kellogg, 1969 (Choptank)
- Halicetus ignotus Kellogg, 1969, (Choptank)
- Cetotherium sp. (St. Mary's)
- Cephalotropis coronatus Cope, 1896 (St. Mary's)
- Family Balaenopteridae (rorquals)
- Balaenopterid? indet. (Eastover)
- Family "Cetotheriidae"
Notes
Schizodelphis is the european "equivalent" of Rhabdosteus. Priscodelphinus crassangulum Case, 1904 is another "synonym".Kellogg originally classified Liolithax pappus as Lophocetus p., but the genus was reassigned by Barnes (1978).