nEpimeron(Zoöl) In crustaceans: The part of the side of a somite external to the basal joint of each appendage.
Century Dictionary and Cyclopedia
nepimeronOne of the side-pieces in the segment of an arthropod or articulate animal. In the Crustacea the epimera form part of the dorsal arc, and the legs are articulated to them. In insects the term is generally restricted to these pieces in the thoracic segments, where an epimeron is the middle one of three sclerites into which any pleuron is divisible; they are situated behind the episterna, between the tergum and the insertions of the legs.
Webster's Revised Unabridged Dictionary
NL., fr. Gr. 'epi` upon + a part
In IIIA, the episternum (a) and epimeron (b) are slightly separated.
"Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4" by Various