Forward or even upward deflection of anterior sterna of some decapods [Moore and McCormick, 1969].
(Order Decapoda):
Foward, or sometimes upward, deflection of anterior sterna [McLaughlin, 1980].
(Order Decapoda):
On underside of cephalothorax, forward, or occasionally upward, deflection of anterior sternum [Stachowitsch, 1992].
Crustacea glossary. Natural History Museum of Los Angeles County. 2011.