Pallene attenuata Hodge, 1864 – synonym of Anoplodactylus petiolatus
Pallene brevirostris Hoek, 1881 – synonym of Callipallene brevirostris
Pallene circularis Goodsir, 1842 – synonym of Pseudopallene circularis
Pallene discoidea Krøyer – synonym of Pseudopallene circularis
Pallene empusa Wilson – synonym of Callipallene brevirostris
Pallene hispida Stimpson – synonym of Pseudopallene circularis
Pallene intermedia Krøyer – synonym of Pseudopallene circularis
Pallene phantoma Norman, 1908 – synonym of Callipallene phantoma
Pallene producta Sars, 1891 – synonym of Callipallene phantoma
Pallene pygmaea Hodge, 1864 – synonym of Anoplodactylus pygmaeus
Pallene spinipes Krøyer – synonym of Pseudopallene spinipes
Phalangium marinum Strøm – synonym of Nymphon stroemi
Phallangium littorale Strøm, 1762 – synonym of Pycnogonum littorale
Phallangium spinosum Montagu – synonym of Endeis spinosa
Phoxichilidium coccineum Hodge, 1861 – synonym of Phoxichilidium femoratum
Phoxichilidium globosum Goodsir – synonym of Phoxichilidium femoratum
Phoxichilidium longicolle Dohrn – synonym of Anoplodactylus pygmaeus
Phoxichilidium maxillare Stimpson – synonym of Phoxichilidium femoratum
Phoxichilidium mutilatum Semper, 1874 – synonym of Anoplodactylus petiolatus
Phoxichilidium petiolatum Hodge, 1864 – synonym of Anoplodactylus petiolatus
Phoxichilidium pygmaeum Hoek, 1881 – synonym of Anoplodactylus pygmaeus
Phoxichilidium tubulariae Lebour, 1945 – synonym of Phoxichilidium femoratum
Phoxichilidium virescens Hodge, 1864 – synonym of Anoplodactylus virescens
Phoxichilus inermis Hesse – synonym of Endeis spinosa
Phoxichilus laevis Carpenter, 1905 – synonym of Endeis spinosa
Phoxichilus spinosus Halhed, 1881 – synonym of Endeis spinosa
Phoxichilus vulgaris Dohrn – synonym of Endeis spinosa
Pseudopallene circularis G.O. Sars – synonym of Pseudopallene circularis
Pseudopallene discoidea Wilson – synonym of Pseudopallene circularis
Pseudopallene hispida Wilson – synonym of Pseudopallene circularis
Pseudopallene intermedia Hansen – synonym of Pseudopallene circularis
Pycnogonum balaenarum Linnaeus – synonym of Pycnogonum littorale
Pycnogonum crassirostre – synonym of Pycnogonum crassirostrum
Pycnogonum grossipes Fabricius, 1780 – synonym of Nymphon grossipes
Pycnogonum pelagicum Stimpson – synonym of Pycnogonum littorale
Pycnogonum spinipes Fabricius, 1780 – synonym of Pseudopallene spinipes