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All About Sarcosuchus
 


Skeletal illustration by Paul C. Sereno,
Flesh illustration by Michael Skrepnick

Name: Sarcosuchus imperator
[Sar-koh-soo-kis im-peer-ay-tor]
Meaning of name: "flesh crocodile emperor"
Nickname: "SuperCroc"
Age: 110 million years
Discovery Site: Niger

When was the first evidence of Sarcosuchus discovered?
A French paleontologist named Alfred Felix de Lapparent found fossilized teeth and armor plates of a giant crocodile while on several prospecting missions to the Sahara in the 1940's and 1950's.

How much of the skeleton was found by the 2000 Expedition to Niger?
Altogether about 50%.

How big did Sarcosuchus grow?
Based on measurements of the skulls and bones, and comparison to recent crocs, Sarcosuchus grew to lengths of 37-40 feet.

This is a world record for a croc, hence, "SuperCroc!" It is twice as long as the largest living croc on record.

How long did it take Sarcosuchus to grow to full adult size?
Growth lines were found in cross-sections of the armor plates--one line was laid down each year.

A plate from an individual 80% grown had over 40 lines, so we suspect that a fully-grown individual would be at least 50-60 years old - about twice the longevity of living crocs.

 

In This Section
The Skeleton
Take an interactive tour of the specialized anatomy of Sarcosuchus.

Skeletal Facts:

The number of bones (not counting skull and armor) is about 250

The number of armor plates along the neck, back and tail is about 70 (2 rows of 35 plates)

The number of vertebrae in the spinal column is about 65

The longest bone in the
skeleton is the femur

The Skull
Get inside the head of the SuperCroc

Skull Stats:

Length of adult skull: 6 feet

Number of bones in skull: about 50 in the cranium (upper part) and 12 in the mandible (6 each side)

Number of teeth: 132
Most fragile bone: ear bone (stapes)

How heavy was it in life?
Based on a comparison to living crocs, Sarcosuchus would have weighed about 8 metric tons (or 8,000 kg), which equals 8.75 English tons (which equals about 17,500 pounds!) That is about 10 times as heavy as the heaviest living croc. Why was it so much heavier when it is only twice as long as the longest living croc? Remember that as length increases, body weight goes up by the cube.

How long did it take to clean the bones?
One year with the attention of many students and technicians.

 
 
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