Adelophthalmus is a genus of prehistoric eurypterid of the family Adelophthalmidae.
Adelophthalmus is distinguishable by its elongate body, with spurs on the segments; its walking legs, which lack spines; and its long styliform (pointed) telson.
Adelophthalmus Jordan in Jordan & von Mayer, 1854
Adelophthalmus approximatus (Hall & Clarke, 1888) – Carboniferous, Pennsylvania, USA
Adelophthalmus asturica (Melendez, 1971) – Carboniferous, d’Ablana, Spain
Adelophthalmus bradorensis (Bell, 1922) – Carboniferous, N. Campbelltown
Adelophthalmus cambieri (Pruvost, 1930) – Carboniferous, Charleroi, Belgium
?Adelophthalmus carbonarius (Chernyshev, 1933) – Carboniferous, Donetsk, Ukraine
Adelophthalmus chinensis (Grabau, 1920) – Carboniferous to Permian Zhaozezhuang
Adelophthalmus corneti (Pruvost, 1939) – Carboniferous, Quaregnon, Belgium
Adelophthalmus douvillei (de Lima, 1890) – Permian, Bussaco, Portugal
Adelophthalmus dumonti (Stainier, 1917) – Carboniferous, Mechelen-sur-Meuse
Adelophthalmus granosus Jordan in Jordan & von Meyer, 1854 – Carboniferous, Saarbrücken, Germ.
Adelophthalmus imhofi (Reuss, 1855) – Carboniferous, Vlkys, Czech Rep.
Adelophthalmus irinae Shpinev, 2006 – Carboniferous, Krasnoyarsk, Russia
Adelophthalmus kidstoni (Peach, 1888) – Carboniferous, Radstock, England
?Adelophthalmus lohesti (Dewalque in Fraipont 1889) – Devonian, Pont de Bonne, Belg.
Adelophthalmus luceroensis Kues & Kietzke, 1981 – Permian, New Mexico
Adelophthalmus mansfieldi (Hall, 1877) – Carboniferous, Pennsylvania
Adelophthalmus mazonensis (Meek & Worthen, 1868) – Carboniferous, Illinois
Adelophthalmus moyseyi (Woodward, 1907a) – Carboniferous, Ilkeston, Blaengarw
Adelophthalmus nebraskensis (Barbour, 1914) – Permian, Nebraska
Adelophthalmus pennsylvanicus (Hall, 1877) – Carboniferous, Pennsylvania
?Adelophthalmus ?perornatus (Peach, 1882) – Carboniferous, Glencartholm, Scotl.
Adelophthalmus pruvosti Kjellesvig-Waering, 1948b – Carboniferous, Lens, France
?Adelophthalmus raniceps Goldenberg, 1873 – Carboniferous, Saarbrücken, Germ.
Adelophthalmus sellardsi (Dunbar, 1924) – Permian, Elmo, Kansas
Adelophthalmus sievertsi (Størmer, 1969) – Devonian, Willwerath, Germ.
Adelophthalmus waterstoni (Tetlie et al., 2004) – Devonian, Kimberley, Australia
Adelophthalmus wilsoni (Woodward, 1888) – Carboniferous, Radstock, England
Adelophthalmus zadrai Přibyl, 1952 – Carboniferous, Moravo-Silesia
