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Tergum

Arched dorsal part of abdominal somites. [Poore, 2004]
Arched dorsal part of each of the anterior five abdominal somites (Fig. 1).
(pl. terga) [Perez Farfante and Kensley, 1997]
Dorsal part of exoskeleton comprising tergites of all body somites taken together; also valve of cirriped shell adjacent to carina and generally opercular. [Moore and McCormick, 1969]
Dorsal surface of the body. [Holdich and Jones, 1983]
Paired plate or valve of thoracic Cirripedia; in lepadomorphs, 1 on each side of occludent margin at apex of capitulum. In verrucomorphs, of two types: fixed tergum, 1 of 4 compartment plates, movable tergum, 1 of 2 opercular plates. In balanomorphs, 1 of 4 opercular plates.
(pl. terga) [McLaughlin, 1980]
The dorsal (and dorsolateral) portion of each of first five abdominal somites between pleura.
(pl. terga) [Butler, T. H.]
The dorsal portion of each of the first five abdominal somites between the pleura.
(pl. terga) [Chace and Hobbs, 1969]
(Taxon-specific: Order Decapoda) Collective term for all tergites; occasionally used as synonym for tergite. [Stachowitsch, 1992]
(Taxon-specific: Order Stomatopoda) Collective term for all tergites. (See also sternum). [Stachowitsch, 1992]
Lepas anatifera: left valve removed. [Anderson, 1980]
(Taxon-specific: Subclass Cirripedia) (Figure only.) [Anderson, 1980]
Lepas anatifera: rostral view; and left valve and cirri removed. [Anderson, 1980]
(Taxon-specific: Subclass Cirripedia) (Figure only.) [Anderson, 1980]
Balanus trigonus: apical view; left lateral view; and operculum, body, and branchiae. [Anderson, 1980]
(Taxon-specific: Subclass Cirripedia) (Figure only.) [Anderson, 1980]
Balanus trigonus: wall plates, exploded; and interior of operculum. [Anderson, 1980]
(Taxon-specific: Subclass Cirripedia) (Figure only.) [Anderson, 1980]
(Taxon-specific: Subclass Cirripedia) One of five primary plates (carina, two scuta, two terga) on outer surface of barnacle. Paired, one tergum located on each side of aperture. In unstalked barnacle, variously associated with scutum to form operculum. Features or regions of tergum include angles (basicarinal, basiscutal), apex, articular ridge, margins (basal, carinal, occludent, scutal), spur, and spur furrow. (fixed, movable). [Stachowitsch, 1992]