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Horseshoe Crab Spines and "Volcanoes"

Jo O'Keefe Copyright 2013. Photos may be used for educational purposes only. Contact me with inquiries.

 

2008 Edisto Island Horseshoe Crab with normal spines showing on the Left and Right. Compare to images below.
one bump with a spine -- This is an opisthosome turned upside down.
evidence of only one spine or volcano -- The left spine position on a normal L. polyphemus
3 spines on a normal L. polyphemus
three spines on a normal L. polyphemus
 
one spine on a normal Limulus polyphemus