New Species, Protosirenid Sirenian
Discovered in the Cooper River,
South Carolina, September, 2009

Photos by: Rick Jacquot

It has been over 7 years since I found the Sirenian skullcap in the Cooper River in South Carolina. It is now February, 2017. Over the past several years, I have been diving for and locating more sirenian skullcaps in an attempt to find another one like the one I found. I have yet to locate one and have now built quite a collection of these skullcaps. Pictured below are some of them.

New species of Sirenian skullcap that I found diving the Cooper River, SC, September, 2009. Measures: 4 5/8” x 3 1/8” x 1 3/4”.

Sirenian/Dugong/Manatee skullcap found in Cooper River, SC, by Henry Crowley.
Measures: 5 1/4” X 3 1/2” X 1 7/8”.


Partial Sirenian/Dugong/Manatee skullcap, Cooper River, SC.
Measures: 2 1/4” X 3” X 1 1/4”.


Sirenian/Dugong/Manatee skullcap, Broad River, SC.
Measures: 4” X 2 3/4” X 1 3/8”.

Sirenian/Dugong/Manatee skullcap, South Carolina river.
Measures: 4 1/4” X 2 3/4” X 1 1/2”.

Sirenian/Dugong/Manatee skullcap, South Carolina river.
Measures: 5 3/8” X 3 3/4” X 2 1/2”.


Infant Sirenian/Dugong/Manatee skullcap, Wando River, SC.
Measures: 2 5/8” X 1 7/8” X  3/4”.

Juvenile Sirenian/Dugong/Manatee skullcap, Wando River, SC.
Measures: 3 3/8” X 2 1/2” X 1 1/4”.


Sirenian/Dugong/Manatee skullcap, Cheehaw River, SC.
Measures: 7 1/4” X 3 1/4” X 2”.


Sirenian/Dugong/Manatee skullcap, Combahee River, SC.
Measures: 3 3/4” X 3 3/8” X 1 1/4”.

Charter Captain Johnny Cercopely recently named the site where I found this fossil after me on his CooperRiverDiving.com website. This is a great honor for me as Johnny is the #1 captain on the Cooper. You can view the dive site here:
Cooper River Dive Site, Jacquot

A couple of antique sirenian prints I picked up on the internet:

Early Lithograph printed in 1897,
Copyrighted 1880, from a book printed in 1897.  


The National Encyclopedia
A Dictionary of Universal Knowledge
by writers of eminence in
Literature, Science and Art
c1880 Print

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