In any list of weird fossil mammals, the regular set of ancient beasts are trotted out. There’s always a brontothere. Uintatherium often shows up. Deinotherium isn’t a surprise, either. And while these long lost mammals are indeed wonderful, there are plenty of critters that are just as strange. One of my favorites is Prolibytherium.
Exactly what sort of beast Prolibytherium was, no one knows for sure. The herbivore has been punted around the hoofed mammal tree a bit, and, for the moment, it seems closest to a group of extinct, deer-like mammals called climacoceratids. But one thing is for sure – this mammal wore some very bizarre headgear.
The first species, named by Camille Arambourg from the 16 million year old rock of Libya, had a massive, splayed appendage growing from between its eyes and over the back of the head. And as Israel Sánchez and colleagues argued in 2010, these ornaments differed between the sexes, with probable females having minimalist spikes that more or less present the framework on which the broader male palms are supported. And now Melinda Danowitz, Rebecceca Domalski, and Nikos Solounias have named a new species of this unusual mammal, extending the range of Prolibytherium into Asia and its span back three million years.
The new species, Prolibytherium fusus, is only known from a 19 million year old braincase with the broad ornaments broken off. Yet, aside from the fractured attachments for the appendages, the back of the skull shows that this species must have had heavy appendages like its geologically younger relative. The occipital condyles – the attachment sites between the back of the skull and the front of the neck – are fused and thickened, providing greater support along the midline for carrying all that extra bone around. And, Danowitz and colleagues note, the reinforcement at the back of the skull might have had provided greater reinforcement for combat, too, although how these butterfly-faced mammals fought is so far left to our Cenozoic imagination.
Fossil Facts
Name: Prolibytherium fusus
Meaning: Prolibytherium means “before Libya’s beast”, coined by Camille Arambourg in 1969 for a different species, while fusus refers to the fused occipital condyles at the back of the skull.
Age: About 19 million years old.
Where in the world?: Zinda Pir, Pakistan
What sort of critter?: A ruminant mammal of uncertain affinities.
Size: About the size of a caribou.
How much of the creature’s body is known?: A braincase with the cranial appendages broken off.
References:
Danowitz, M., Domalski, R., Solounias, N. 2015. A new species of Prolibytherium (Ruminantia, Mammalia) from Pakistan, and the functional implications of an atypical atlanto-occipital morphologyA new species of Prolibytherium (Ruminantia, Mammalia) from Pakistan, and the functional implications of an atypical atlanto-occipital morphologyA new species of Prolibytherium (Ruminantia, Mammalia) from Pakistan, and the functional implications of an atypical atlanto-occipital morphology. Journal of Mammalian Evolution. doi: 10.1007/s10914-015-9307-8
Sánchez, I., Quiralte, V., Morales, J., Azanza, B., Pickford, M. 2010. Sexual dimorphism of the frontal appendages of the early Miocene pecoran Prolibytherium Arambourh, 1961 (Mammalia, Ruminantia). Journal of Vertebrate Paleontology. doi: 10.1080/02724634.2010.483555
Previous Paleo Profiles:
The Unfortunate Dragon
The Cross Lizard
The Cross Lizard
The South China Lizard
Zhenyuan Sun’s dragon
Zhenyuan Sun’s dragon
The Fascinating Scrap
The Fascinating Scrap
The Sloth Claw
The Hefty Kangaroo
Mathison’s Fox
Scar Face
The Rain-Maker Lizard
“Lightning Claw”
The Ancient Agama
The Hell-Hound
The Hell-Hound
The Cutting Shears of Kimbeto Wash
The False Moose
“Miss Piggy” the Prehistoric Turtle
Mexico’s “Bird Mimic”
The Greatest Auk
Catalonia’s Little Ape
Related Topics
Go Further
Animals
- Octopuses have a lot of secrets. Can you guess 8 of them?
- Animals
- Feature
Octopuses have a lot of secrets. Can you guess 8 of them? - This biologist and her rescue dog help protect bears in the AndesThis biologist and her rescue dog help protect bears in the Andes
- An octopus invited this writer into her tank—and her secret worldAn octopus invited this writer into her tank—and her secret world
- Peace-loving bonobos are more aggressive than we thoughtPeace-loving bonobos are more aggressive than we thought
Environment
- This ancient society tried to stop El Niño—with child sacrificeThis ancient society tried to stop El Niño—with child sacrifice
- U.S. plans to clean its drinking water. What does that mean?U.S. plans to clean its drinking water. What does that mean?
- Food systems: supporting the triangle of food security, Video Story
- Paid Content
Food systems: supporting the triangle of food security - Will we ever solve the mystery of the Mima mounds?Will we ever solve the mystery of the Mima mounds?
- Are synthetic diamonds really better for the planet?Are synthetic diamonds really better for the planet?
- This year's cherry blossom peak bloom was a warning signThis year's cherry blossom peak bloom was a warning sign
History & Culture
- Strange clues in a Maya temple reveal a fiery political dramaStrange clues in a Maya temple reveal a fiery political drama
- How technology is revealing secrets in these ancient scrollsHow technology is revealing secrets in these ancient scrolls
- Pilgrimages aren’t just spiritual anymore. They’re a workout.Pilgrimages aren’t just spiritual anymore. They’re a workout.
- This ancient society tried to stop El Niño—with child sacrificeThis ancient society tried to stop El Niño—with child sacrifice
- This ancient cure was just revived in a lab. Does it work?This ancient cure was just revived in a lab. Does it work?
- See how ancient Indigenous artists left their markSee how ancient Indigenous artists left their mark
Science
- Do you have an inner monologue? Here’s what it reveals about you.Do you have an inner monologue? Here’s what it reveals about you.
- Jupiter’s volcanic moon Io has been erupting for billions of yearsJupiter’s volcanic moon Io has been erupting for billions of years
- This 80-foot-long sea monster was the killer whale of its timeThis 80-foot-long sea monster was the killer whale of its time
- Every 80 years, this star appears in the sky—and it’s almost timeEvery 80 years, this star appears in the sky—and it’s almost time
- How do you create your own ‘Blue Zone’? Here are 6 tipsHow do you create your own ‘Blue Zone’? Here are 6 tips
Travel
- This town is the Alps' first European Capital of CultureThis town is the Alps' first European Capital of Culture
- This royal city lies in the shadow of Kuala LumpurThis royal city lies in the shadow of Kuala Lumpur
- This author tells the story of crypto-trading Mongolian nomadsThis author tells the story of crypto-trading Mongolian nomads