Tesnusocaris is an extinct, monospecific genus of remipedian crustaceans that lived in the Pennsylvanian period, one of the two representatives of the extinct remipedian order Enantiopoda. It is known from a fossil discovered in the Lower Pennsylvanian Tesnus Formation of Texas. The other known enantiopod remipedian is Cryptocaris hootchi of the Mazon Creek fauna.