TYPE SPECIES:
• A. dunkleri (Dames, 1884) [nomen dubium] (originally Megalosaurus) "Dunkler's high spined one"
  
  MISASSIGNED SPECIES:
• A. lydekkerhueneorum Pickering, 1994 vide Pickering, 1995 [nomen nudum] "Lydekker's and von Huene's high spined one" == Becklespinax altispinax
• A. oweni (Lydekker, 1889) (originally Megalosaurus) "Sir Richard Owen's high spined one" = Valdoraptor oweni
• A. parkeri (von Huene, 1926) (originally Megalosaurus) = Metriacanthosaurus parkeri

Animalia
Vertebrata
Tetrapoda
Sauropsida
Archosauromorpha
Ornithodira
Dinosauria
Theropoda

The name Altispinax dunkleri was once used to indicate remains of a theropod with high vertebral spines, similar to those of Spinosaurus. In fact, the type material for this species is merely teeth, teeth which can not confidently be assigned to the same animal as the skeletal remains. The bones were reassigned to a new species of Acrocanthosaurus, another high-spined theropod. This species was called A. altispinax. But further study indicated that it could not confidently be said to belong to the genus Acrocanthosaurus. Hence, it was placed in a new genus and is now known as Becklespinax altispinax. Altispinax dunkleri is now a dubious species.