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Use "mesothoracic" in a sentence
"The last of the indirect neck muscles connects the base of the endosternum to the supraneural bridge of the mesothoracic endosternum, and is thus a retractor of the propectus"
"BugGuide also indicates: "The adult of this large, handsome species is easily separated from all other green lacewings found on citrus in Florida by the presence of two dusky spots on each forewing and the unusual mesothoracic markings.""