Home BiologyA List of Ancient Sharks from Small to Scary
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A List of Ancient Sharks from Small to Scary
The Elegestolepis sharks had placoid scales over its body. Pixabay

Elegestolepis

The Elegestolepis is shrouded in much mystery. Scientists only know what they could gleam from fossilized placoid scales. It is believed that the sharks were covered in placoid scales that were hydro dynamically shaped to keep down water resistance.

A List of Ancient Sharks from Small to Scary
Photo Credit: Pinterest

These sharks were believed to have lived in the late Silurian period, more than 420 million years ago. They are thought to be one of the earliest sharks, even predating much of the life on land.

A List of Ancient Sharks from Small to Scary
The Borneo Shark was rediscovered in 2004. Underwater Fish

Borneo Shark

The borneo shark was once thought to have been extinct. The scarce species was discovered in 2004. The small gray shark is only 26 inches in length. The slender body includes a long pointed snout and a second dorsal fin behind its anal fin. The sharks mostly feed on bony fishes.

A List of Ancient Sharks from Small to Scary
Photo Credit: Wikipedia

It is the only member of its genus to have a row of enlarged pores above the corners of its mouth. Before its sighting, the last recorded time a Borneo shark was spotted was in 1937. The shark continues to gain conservation concern from scientists.

A List of Ancient Sharks from Small to Scary
You probably didn’t realize there was so many different types of sharks! Pixabay

Lost Shark

Previously known as the false smalltail shark, the Carcharhinus obsolerus has not been seen in more than 80 years, and scientists believe they may have become extinct. The species was known to swim in the Western Central Pacific Ocean area, and the last three specimens found were in Borneo, Vietnam, and Thailand.

A List of Ancient Sharks from Small to Scary
Photo Credit: Csiro

Although they have not been seen since 1937, scientists are hopeful that the lost sharks are not entirely lost. The rediscovery of the borneo sharks gives them hope that these sharks could be found again.

Sources

https://www.fossilera.com/pages/megalodon

https://extremesharkfacts.com/sharks/lemon-shark-facts/

https://www.aquarium.co.za/blog/entry/top-10-prehistoric-sharks

https://www.sharksinfo.com/extinct-sharks.html

http://www.sci-news.com/paleontology/science-nursery-bandringa-sharks-01678.html

https://www.sharksider.com/ten-largest-sharks-history/

https://www.sharks-world.com/prehistoric_sharks/

https://ocean.si.edu/ocean-life/sharks-rays/sharks

http://www.prehistoric-wildlife.com/top-tens/top-ten-prehistoric-sharks.html

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