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Carapace groove

Furrow on surface of decapod, generally dorsal — named types:
a) antennal. Furrow on carapace extending backward from vicinity of antennal spine.
b) branchiocardiac. Oblique furrow approximately in middle of posterior half of each side of carapace, separating branchial and cardiac regions and reaching dorsomedian part of carapace well behind cervical or postcervical grooves; may be longitudinal, connecting cervical and postcervical grooves, or extending backward from submedian point on postcervical groove.
c) cervical. Transverse furrow in median part of carapace between gastric and cardiac regions, curving forward toward antennal spine.
d) gastroorbital. Short longitudinal furrow branching from cervical groove at level of orbit and running toward it.
e) hepatic. Short longitudinal furrow connecting cervical with postcervical and branchiocardiac grooves, more or less continuing antennal groove.
f) inferior. Transverse furrow extending from junction or hepatic and cervical grooves toward side margin of carapace, more or less continuous with cervical groove.
g) marginal. Furrow close to posterior edge of carapace and parallel to it.
h) postcephalic. one of three transverse furrows on carapace of many fossil decapods.
i) postcervical. Furrow located behind cervical groove and parallel to it, dividing cardiac region into two parts.
j) submedian. Longitudinal furrow in submedian dorsal part of carapace closely adjacent to post-rostral carina. [Moore and McCormick, 1969]