• Pycnogonum (Retroviger) pusillum Dohrn, 1881
• Pycnogonum balaenarum Linnaeus, 1767 accepted as Pycnogonum litorale (Strøm, 1762)
• Pycnogonum cessaci Bouvier, 1911
• Pycnogonum chelatum Böhm, 1879 accepted as Boehmia chelata (Böhm, 1879)
• Pycnogonum crassirostrum Sars, 1888
• Pycnogonum kussakini Turpaeva, 2000
• Pycnogonum leticiae Mello-Leitão, 1945 accepted as Pycnogonum cessaci Bouvier, 1911
• Pycnogonum litorale (Strøm, 1762)
• Pycnogonum littorale (Strøm, 1762) accepted as Pycnogonum litorale (Strøm, 1762)
• Pycnogonum nodulosum Dohrn, 1881
• Pycnogonum plumipes Stock, 1960
• Pycnogonum pusillum Dohrn, 1881 represented as Pycnogonum (Retroviger) pusillum Dohrn, 1881