coxal plate

coxal plate
Lateral expansion of coxa broadly joined to lateral mergin of tergite [McLaughlin, 1980].
Lateral expansion of pereiopod coxa joined broadly to lateral margins of tergites [Moore and McCormick, 1969].
Pereopodal coxae that are expanded as lateral side plates in some of the more derived groups of isopods and in some amphipods [Brusca and Brusca, 2002].
(Order Amphipoda):
Modification of proximal segment (coxa) of appendage (e.g., pereopod) into immovable, plate-like structure. Serves protect gills and accentuates laterally compressed shape of body, (contiguous, discontiguous; bilobed, rectangular, rounded, spiniform; margin: setose, serrate, smooth; ornamentation: setose, with ridges, spines, tubercles) [Stachowitsch, 1992].
(Order Isopoda):
Coxae of the pereopods laterally expanded into flattened lamellar structures extending freely (as "plates") to overhang the coxa-basis hinge of the leg [Wetzer et al. 1997].
(Order Isopoda):
Lateral extension of proximal segment (coxa) of pereopod; may be fused to body wall. (Syn. epimere) [Stachowitsch, 1992].

Crustacea glossary. . 2011.

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