Full Breakdown
New Moroccan Titanosaur Sheds Light on Late Cretaceous Dinosaur Endemism
4/30/2026, 11:31:16 AM
Discovery of Phosphatotitan khouribgaensis
A team led by Dr. Nick Longrich of the University of Bath described a new genus and species of titanosaurian sauropod, *Phosphatotitan khouribgaensis*, from the “late, but not latest” Maastrichtian of the Cretaceous, about 70 million years ago. The holotype material—dorsal and caudal vertebrae, sacral fragments, and pelvic elements—was recovered from phosphate deposits at Sidi Chennane in the Oulad Abdoun Basin of Morocco’s Khouribga region.
Research Team and Publication
The findings appear in the peer-reviewed journal Diversity (Longrich et al., 2026). The author list includes Dr. Longrich and collaborators from the University of Bath and other institutions. The paper presents the first African titanosaur with clear affinities to South American Lognkosauria.
Geological and Paleoenvironmental Setting
The Oulad Abdoun Basin’s phosphatic sandstones, marls and limestones were deposited in a warm, shallow epicontinental sea that fringed the Atlantic and Tethys oceans during the Late Cretaceous and Early Paleogene. High sea levels at the time likely produced isolated landmasses across North Africa.
Morphology, Size, and Phylogenetic Affinities
*Phosphatotitan* shares short dorsal and caudal centra, expanded neural spines, and a broad pubis with South American lognkosaurs such as *Patagotitan*. However, its estimated body mass is modest—between 3 and 5 tons, considerably smaller than its giant relatives. The reduced size may reflect island-like ecological pressures.
Implications for Gondwanan Biogeography and Endemism
The close relationship to South American taxa suggests either a once-wide Gondwanan distribution of lognkosaurs before Africa and South America separated (>100 Ma) or later dispersal across narrow marine barriers. The authors argue that Morocco hosted a distinct, endemic Late Cretaceous fauna, separate from other African regions, highlighting the high degree of endemism and the incompleteness of current dinosaur diversity records.
Data Summary
- Age: Late Maastrichtian (~70 Ma)
- Location: Sidi Chennane, Khouribga province, Morocco
- Material: Dorsal & caudal vertebrae, sacral and pelvic fragments
- Estimated mass: 3–5 tons
- Phylogenetic placement: Lognkosauria (Argentinosauridae)
Official Statements from the Authors
The study emphasizes that the Late Cretaceous marked the final diversification of dinosaurs before the end-Cretaceous extinction and that African dinosaur faunas remain poorly sampled. The authors propose that high sea levels generated isolated habitats, fostering unique evolutionary trajectories and regional extinctions. They caution that the high endemism observed complicates attempts to reconstruct global dinosaur diversity patterns preceding the mass extinction.
Verbatim Quotes
- “The latest Cretaceous saw the final diversification of dinosaurs before the end-Cretaceous extinction,” — Dr. Nick Longrich, lead author
- “Far less is known about dinosaurian faunas of the southern hemisphere, especially Africa.” — Dr. Nick Longrich, lead author
- “The phosphates of the Oulad Abdoun Basin of the Khouribga province consist of phosphatic sandstones, marls and limestones,” — Research team
- “Phosphatotitan khouribgaensis, along with previously reported hadrosaurids, suggests that Morocco supported a unique, endemic fauna in the latest Cretaceous, distinct from those found elsewhere in Africa,” — Study authors
- “High sea levels in the Late Cretaceous may have created isolated landmasses, with distinct faunas emerging that reflect a combination of vicariance, endemism, and regional extinction.” — Study authors
Conflicting Reports & Gaps
The published mass estimates differ: one source cites “roughly 3 tons,” while another reports “4–5 tons.” The limited skeletal material also leaves uncertainty regarding finer phylogenetic placement within Lognkosauria.
What’s Next
The authors recommend intensified fieldwork in North-African phosphatic basins to uncover additional specimens, which could refine size estimates, clarify biogeographic pathways, and improve understanding of Late Cretaceous endemism across Gondwana.
