Edited by sixgill pete
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Hemipatagus carolinensis
Images: 
By sixgill pete (edited)
Taxonomy
Hemipatagus sp.
Kingdom: Animalia
Phylum: Echinodermata
Class: Echinoidea
Order: Spatangoida
Family: Spatangidae
Genus: Hemipatagus
Species: Hemipatagus sp.
Geological Time Scale
Eon: Phanerozoic
Era: Cenozoic
Period: Neogene
Sub Period: None
Epoch: Oligocene
Stratigraphy
River Bend Formation
Provenance
Collector: Don Rideout
Date Collected: 10/15/2015
Acquired by: Field Collection
Dimensions
Length: 45 mm
Width: 44 mm
Thickness: 17 mm
Location
Topsail Island Beach
Onslow County
North Carolina
United States
Comments
This echinoid was found during a beach re-nourishment project by offshore dredging at Topsail Island, North Carolina. The dredging was roughly a mile offshore where they pumped sand and lots of goodies onshore where they hit an exposure of the River Bend Formation. Besides echinoids ( there were 4 species I know of) there were also sharks teeth and a new species of brittle star. These echinoids, H. carolinensis were known from 2 quarries (one now closed) and are extremely rare. However, during this project there were thousands of them littering the beach. But, most were broken. Some of them still even retained their original color.
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