Explore Science-first Philosophy

STORY

Marasuchus lilloensis

By Michael Alan Prestwood

Tue 28 May 2024
Published 2 years ago.
Updated 3 weeks ago.
Related Stories
Enantiornithes Birds Emerge (Now Extinct)
Bird-line Archosaur: Nyasasaurus parringtoni
Toothed Birds Go Extinct
The Last Theropods
Pterosaurs Diverge From Dinosaur Ancestors (within Ornithodira)
Ornithischians Diverge Within Dinosauria “Bird Hipped”
Share :

Marasuchus lilloensis

240 Million Years Ago
Elongated hind limbs, better running, reduced forelimbs

Before dinosauromorphs like Asilisaurus, the evolutionary lineage would include earlier archosaurs. One such early archosaur is Marasuchus lilloensis, which lived around 240 million years ago. Marasuchus exhibits several primitive features that are on the evolutionary path towards dinosaurs.

  • Kingdom: Animalia > Phylum: Chordata > Class: Reptilia > Order: Dinosauriformes
  • 30 to 40 cm (12 to 16 inches)
  • Found in Argentina, South America
  • primarily bipedal
  • carnivore

— map / TST —

Michael Alan Prestwood
Author & Natural Philosopher
Prestwood writes on science-first philosophy, with particular attention to the convergence of disciplines. Drawing on his TST Framework, his work emphasizes rational inquiry grounded in empirical observation while engaging questions at the edges of established knowledge. With TouchstoneTruth positioned as a living touchstone, this work aims to contribute reliable, evolving analysis in an emerging AI era where the credibility of information is increasingly contested.
Email
Print
This month @ TST
Column Menu
May 2026
»COLUMN ARCHIVE
--COLUMN--
Column Research….
1. Timeline Story
Book: The Idea of History
2. Linked Quote
“The historian without his facts is rootless…the facts without their historian are…meaningless.”
3. Science FAQ »
Is science tainted by bias?
4. Philosophy FAQ »
Debating History: Should We Say “Dark Ages” or “Middle Ages?”
5. Critical Thinking FAQ »
What is the preservation bias?
6. History FAQ!
Did Einstein’s driver really give one of his early talks?
Bonus Deep-Dive Article
TST Philosophy of History

Comments

Join the Conversation! Currently logged out.

Leave a Reply

NEW BOOK! NOW AVAILABLE!!

30 Philosophers: A New Look at Timeless Ideas

by Michael Alan Prestwood
The story of the history of our best ideas!
Scroll to Top