Longitudinal groove or uncalcified line extending backwards from front margin of carapace slightly above branchiostegal spine and reaching to or beyond hepatic spine (e.g., palaemonid carideans) [Moore and McCormick, 1969].
Longitudinal groove or uncalcified line extending posteriorly from anterior margin of carapace, slightly above branchiostegal spine, to or slightly beyond hepatic spine in some caridean decapods [McLaughlin, 1980].
(Order Decapoda):
In shrimp-like (natantian) decapod, longitudinal groove or uncalcified line extending from anterior margin of carapace (slightly above branchiostegal spine) to or slightly beyond hepatic spine [Stachowitsch, 1992].
Crustacea glossary. Natural History Museum of Los Angeles County. 2011.