All mouthparts of cirripeds [McLaughlin, 1980].
Mouthparts of cirripeds, including labrum, mandibles, maxillules, maxillae, palpi, and in some, first pair of cirri [Moore and McCormick, 1969].
(Subclass Cirripedia):
Collective term for mouthparts (mandible, maxillules, maxillae). Closely associated with labrum with which, in ascothoracican, they form oral pyramid [Stachowitsch, 1992].
Crustacea glossary. Natural History Museum of Los Angeles County. 2011.