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Egypt Fossils Identify Oldest Dyrosaurid, Point to African Origins

CT imaging combined with phylogenetic analysis places Wadisuchus kassabi at the base of the group, shifting its early evolution into the Campanian.

Overview

  • The newly named Wadisuchus kassabi comes from the middle Campanian Quseir Formation in Egypt and dates to about 80 million years ago.
  • Fieldwork near the Kharga and Baris oases yielded two partial skulls plus snout material from four individuals at different growth stages.
  • The 3.5–4 m long, long-snouted predator shows four front snout teeth, dorsally positioned nostrils, and a deep snout notch consistent with coastal feeding adaptations.
  • Phylogenetic results recover the species as an early-diverging dyrosaurid, supporting a North African origin with diversification beginning as early as the ConiacianSantonian.
  • The peer-reviewed study, published today in the Zoological Journal of the Linnean Society, extends the clade’s record into the Campanian and prompts calls to protect Western Desert fossil sites.