Alcynous megacephalus Costa, 1861 (uncertain > nomen dubium )
Flagellopantopus blocki Poschmann & Dunlop, 2006 †
Foxichilus pygmaeus Costa, 1836 (uncertain > nomen dubium )
Oiceobathys arachne Hesse, 1867 (uncertain > nomen dubium )
Oomerus stigmatiphorus Hesse, 1874 (uncertain > nomen dubium )
Palaeopycnogonides gracilis Charbonnier, Vannier & Riou, 2007 †
Palaeothea devonica Bergström, Sturmer & Winter, 1980 †
Paritoca spinipalpis Philippi, 1842 (uncertain > nomen dubium )
Pephredro capillata Goodsir, 1842 (uncertain > nomen dubium )
Pephredro hirsuta Goodsir, 1842 (uncertain > nomen dubium )
Platychelus sardonicus Costa, 1861 (uncertain > nomen dubium )