nEpiplastron(Anat) One of the first pair of lateral plates in the plastron of turtles.
Century Dictionary and Cyclopedia
nepiplastronThe anterior lateral one of the nine pieces of which the plastron of a turtle may consist. It has been usually called episternum, from a mistaken view of its sternal character. There are a pair of epiplastra, one on each side of the single median entoplastron, and in front of the hyoplastra. See plastron, second figure under carapace, and second cut under Chelonia.
Chambers's Twentieth Century Dictionary
nEpiplastronep-i-plas′tron the anterior lateral one of the nine pieces of which the plastron of a turtle may consist.
Webster's Revised Unabridged Dictionary
Pref. epi-, + plastron,
The callosities on the plastral bones are sculptured; small, recently formed callosities on the preplastra and epiplastron lack sculpturing.
"North American Recent Soft-shelled Turtles (Family Trionychidae)" by Robert G. Webb