There are 19 endemic species in Cape Cod, Nova Scotia, Island of Newfoundland (zone 11)
Acartia (Acartia) forcipata Thompson & Scott, 1897 (F)(presence in 1 zones) Anomalocera opalus Pennel, 1976 (F,M)(presence in 1 zones) Brachycalanus minutus Grice, 1972 (F,M)(presence in 1 zones) Brachycalanus ordinarius (Grice, 1972) (F)(presence in 1 zones) Mesaiokeras heptneri Andronov, 1973 (F,M)(presence in 1 zones) Neoscolecithrix magna (Grice, 1972) (F)(presence in 1 zones) Neoscolecithrix watersae (Grice, 1972) (F,M)(presence in 1 zones) Platycopia sarsi M.S. Wilson, 1946 (presence in 1 zones) Platycopia tumida (C.B. Wilson, 1935) (F,M)(presence in 1 zones) Pseudotharybis magnus (Grice & Hulsemann, 1970) (M)(presence in 1 zones) Scolecitrichopsis distinctus (Grice & Hulsemann, 1970) (M)(presence in 1 zones) Scolecitrichopsis elongatus (Grice & Hulsemann, 1970) (F,M)(presence in 1 zones) Talacalanus sp.2 (Grice, 1972) (M)(presence in 1 zones) Tharybis altera (Grice & Hulsemann, 1970) (M)(presence in 1 zones) Tharybis compacta (Grice & Hulsemann, 1970) (F,M)(presence in 1 zones) Xantharus formosus Andronov, 1981 (F,M)(presence in 1 zones) Xanthocalanus macilenta (Grice & Hulsemann, 1970) (M)(presence in 1 zones) Xanthocalanus rotundus (Grice & Hulsemann, 1970) (M)(presence in 1 zones) Xanthocalanus sp.1 Grice, 1972 (M)(presence in 1 zones)
