One of numerous, more or less clearly delimited and elevated subdivisions of carapace. According to position or underlying internal organs, as well as according to group, one may distinguish antennal, antero-lateral, branchial, cardiac, epibranchial, epigastric, frontal, gastric, hepatic, intestinal, mesobranchial, mesogastric, metabranchial, metagastric, orbital, postero-lateral, protogastric, pterygostomial, subhepatic, and urogastric regions.
(M. Stachowitsch, 1992)

Alternative forms for carapace region : carapace area, region, region.