Chitinous plate in Cirripedia (Lepadomorpha and Verrucomorpha) having a distinctive honeycomb appearance, developing at incipient umbones of terga, scuta and carina, during metamorphosis [Moore and McCormick, 1969].
One of 5 chitinous plates (scuta, terga, and carina) in cyprid larvae of lepadomorphs and verrucomorphs, site of calcification during metamorphosis, sometimes visible at umbones of these plates in adults [McLaughlin, 1980].
Crustacea glossary. Natural History Museum of Los Angeles County. 2011.