The Crag Lizards are small to large girdled lizards from South Africa. Six species of Pseudocordylus are known; they are distinguished from other Cordylus

Cordylus

The genus Cordylus includes a wide variety of small to medium sized spiny lizards from Africa, collectively called girdle-tailed or girdled lizards. All are diurnal and ovoviviparous . Most species are rupicolous while a few species are arboreal or live in burrows...

 by the presence of granular scales on the back instead of osteoderms. Recent molecular data places Pseudocordylus within Cordylus.http://research.amnh.org/scicomp/pdfs/Frost_etal2001a.pdf
Classification of the genus Pseudocordylus

Genus Pseudocordylus

• Pseudocordylus capensis
• Lang's Girdled Lizard, Pseudocordylus langi, near threatened (LR/nt)
• Pseudocordylus melanotus
• Pseudocordylus microlepidotus
• Pseudocordylus nebulosus
  Pseudocordylus nebulosus
  Hemicordylus nebulosus is a species of lizard in the Cordylidae family.It is endemic to South Africa.-Source:* Hemicordylus resurrected: , Between a rock and a hard polytomy: Rapid radiation in the rupicolous girdled lizards...
  
  , vulnerable (VU)
• Prickly Girdled Lizard
  Prickly Girdled Lizard
  The Prickly Girdled Lizard or Spiny Crag Lizard is a species of lizard in the Cordylidae family.It is found in Lesotho and South Africa.-Source:...
  
  , Pseudocordylus spinosus, near threatened (LR/nt)