Pars : A part of an organ

Peduncle : Stem or stalk

Petaloid lobes : Like a petal

Petasma : Endopodite of the first pleopods in male penaeidae

Phyllobranchiate : Gills filaments of thin plates arranged in two ros on a central axix like the leaves of a book

Pincers (Chelae) : Fingers

Pleurobranchiae : Gills springing from lateral walls of thorax

Plumose setae : Feathery or having feathers

Propodus : Second part from the distal end of a leg or maxilliped. In a cheliped the propodus consists of a palmar portion and a narrower, immovable finger

Pterygostomian spine : Spine at anterilateral (antero-ventral) corners or border of carapace

Pubescent : Covered with soft hair

Punctate : Having surface covered with small dots