Chauvetia lamyi Knudsen, 1956 (original description)
Coralliophila jarli Knudsen, 1956 (original description)
Coralliophila marrati Knudsen, 1956 (original description)
Marginella atlantidea Knudsen, 1956 accepted as Gibberula atlantidea (Knudsen, 1956) (original description)
Metula clathrata (A. Adams & Reeve, 1850) accepted as Metula knudseni Kilburn, 1975 accepted as Metula amosi Vanatta, 1913 (additional source)
Metula clathrata Knudsen, 1956 accepted as Metula africana Bouchet, 1988 (original description)
Nassa liberiensis Knudsen, 1956 accepted as Nassarius liberiensis (Knudsen, 1956) (original description)
Nassa wolffi Knudsen, 1956 accepted as Nassarius wolffi (Knudsen, 1956) (original description)
Nassarius desmouleoides [sic] sensu Knudsen, 1956 accepted as Nassarius arcadioi Rolán & Hernández, 2005 (basis of record)
Oliva leucozonias J. E. Gray, 1839 accepted as Olivella pulchella (Duclos, 1835) (source of synonymy)
Pyrene dartevelli Knudsen, 1956 accepted as Mitrella dartevelli (Knudsen, 1956) (original description)
Pyrene melvilli Knudsen, 1956 accepted as Mitrella melvilli (Knudsen, 1956) (original description)
Pyrene verdensis Knudsen, 1956 accepted as Mitrella verdensis (Knudsen, 1956) (original description)
Trophon fraseri Knudsen, 1956 accepted as Pagodula fraseri (Knudsen, 1956) (original description)

Angolan Exclusive Economic Zone for Marginella atlantidea Knudsen, 1956 
Mauritanian Exclusive Economic Zone for Nassarius desmouleoides [sic] sensu Knudsen, 1956 
Sierra Leonian Exclusive Economic Zone for Nassarius desmouleoides [sic] sensu Knudsen, 1956