In 1983, a relatively complete skeleton was excavated from the Smokejacks pit in Surrey, England. These remains were described by British paleontologists Alan J. Charig and Angela C. Milner in 1986 as the holotype of a new species, "Baryonyx walkeri." After the discovery of "Baryonyx," many new genera have since been described, the majority on very incomplete remains. However, other finds bear enough fossil material and distinct anatomical features to be assigned with confidence. Paul Sereno and colleagues described "Suchomimus" in 1998"," a baryonychine from Niger on the basis of a partial skeleton found in 1997. In 2004, partial jaw bones were recovered from the Alcântara Formation, these were referred to a new genus of spinosaurine named "Oxalaia" in 2011 by Alexander Kellner.