One of pair of tubular frontolateral extensions of cuticle of cirriped nauplii (except Ascothoracica), apparently perforate at tips and provided with mass of gland cells at base [Moore and McCormick, 1969].
One pair of tubular frontolateral extensions of cuticle of cirriped nauplius (except Ascothoracica) [McLaughlin, 1980].
Crustacea glossary. Natural History Museum of Los Angeles County. 2011.