longitudinal septum

longitudinal septum
In cirripeds (Balanomorpha), wall of tubes disposed normal to inner and outer laminae of compartment plate separating them. (Syn. parietal septum) [Moore and McCormick, 1969].
Partition disposed normal to inner and outer laminae of compartmental plate in some balanomorph cirripeds, resulting in longitudinal tubes. (Pl. longitudinal septa) (Syn. parietal tubes) [McLaughlin, 1980].
(Subclass Cirripedia):
Barnacle shell feature: in unstalked form, one in a series of longitudinal walls between inner and outer lamellae of compartmental plate. Septa are arranged perpendicular to lamellae and form canals (longitudinal tubes). (primary, secondary). (Syn. parietal septum) [Stachowitsch, 1992].

Crustacea glossary. . 2011.

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