gnathopods

Chelate or subtotal, prehensile maxilliped (e.g., Amphipoda); also used for first two prehensile pereiopods of amphipods whether chelate or subchelate [Moore and McCormick, 1969].

Prehensile maxilliped; also 1^st 2 prehensile pereopods of amphipods, either chelate or subchelate [McLaughlin, 1980].

(Order Amphipoda):

Modified second and third thoracopod pairs (= first and second pereopods). Uniramous, consisting of modified, immovable coxa (coxal plate) and six free segments (basis, ischium, merus, carpus, propodus, dactylus). Last segments typically form subchela. (sexually/not sexually dimorphic, polymorphic: carpo-subchelate, chelate, subchelate) [Stachowitsch, 1992].

(Order Isopoda):

A loosely used term usually referring to chelate or subchelate pereopods associated with the head region and used for food handling. This term is rarely used for isopods [Wetzer et al. 1997].

(Order Isopoda):

Term applied to more anterior pereopod(s) if modified as prehensile (grasping) organ. Last segments typically form subchela [Stachowitsch, 1992].

(Order Mysida):

Term applied to thoracic endopods when these are modified as mouthparts [Stachowitsch, 1992].