cardiac region
See: carapace region d [Martin, 2005].
See: carapace regions d [McLaughlin, 1980].
Dorsolateral region of carapace bounded anteriorly by gastric region and laterally by branchial regions [Butler, T.H.].
The dorsomedian area on the carapace bounded anteriorly by the gastric region, laterally by the branchial regions, and (in the crabs) posteriorly by the intestinal region. This area is often very narrow in the crayfishes and commonly called the areola [Chace and Hobbs, 1969].
The region on the dorsal surface of the carapace bounded by parts or the margins of the urogastric, mesobranchial, metabranchial and intestinal regions [Ingle, 1983].
(Order Cumacea):
Unpaired median region in posterior half of carapace; overlies anterior region of heart. (See also branchial region) [Stachowitsch, 1992].
(Order Decapoda):
Relatively large, unpaired median region in posterior half of carapace; overlies heart. Adjoined anteriorly by gastric, posteriorly by intestinal, and laterally by branchial regions [Stachowitsch, 1992].

Crustacea glossary. . 2011.

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