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Balanus trigonus: apical view; left lateral view; and operculum, body, and branchiae.

From: Anderson, D. T. 1980. Barnacles - structure, function, development and evolution. Chapman and Hall London..

This image is referenced by the following definitions:

Carina  [Anderson, 1980]
Carinolateral  [Anderson, 1980]
Compound rostrum  [Anderson, 1980]
Lateral  [Anderson, 1980]
Operculum  [Anderson, 1980]
Scutum  [Anderson, 1980]
Tergal depressor insertion  [Anderson, 1980]
Tergum  [Anderson, 1980]