German term (edited): Kieferf��e

http://www.emporia.edu/biosci/invert/lab6/:
Order Tanaidacea
Anterior 2 thoracic segments covered by and fused with carapace. Second pair of thoracic appendages are gnathopods.

http://www.personal.usyd.edu.au/~buz/percarids/tsld007.htm:
Cephalisation

Anterior thoracopods of malacostracans have been transferred from locomotion to feeding
Some cephalised thoracic limbs are called “maxillipeds”
Some cephalised limbs are not called “maxillipeds”; i.e., gnathopods (isopods or amphipods) or chelipeds (Tanaids)

http://atiniui.nhm.org/glossary/?terms=Gnathopods:
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]