appendix interna

appendix interna

A slender rodlike lappet on the mesial ,argin of the endopod of the second through fifth pleopods of shrimps; it is provided with terminal hooked setae by which the two pleopods of a pair must be joined mesially.

A slender rodlike structure on the mesial border of the endopod of the second through fifth pleopods of shrimps; terminal and/or subterminal hooked setae allow the mesial joining of two pleopods of a pair.

Medial projection stemming from pleopodal endopods, serving to unite members of each pair of pleopods.

Median process of pleopodal endopod uniting members of each pair.

Slender lappet, sometimes rodlike, at the mesial base of the endopod of the second pleopod (dorsal to the appendix masculina) of many males.

Slender rodlike flap on inner margin of endopod of the second to fifth pleopods of shrimp.

Slender, rodlike structure on mesial border of endopod of second through fifth pleopods of shrimp.

Small branch on inner margin of pleopod 2, triangular or rod-like, usually with clusters of hooks to attach to its pair.

Small separate branch on mesial side of pleopodal endopodite, usually tipped with hooks which interlock with opposite member in swimming.

Projection of inner branch (endopod) of each pleopod; serves to hook pleopod to its opposite member (for swimming).

Projection of inner branch (endopod) of each pleopod. Bears hooks (retinacula) and, in first pleopod pair of male, hook-shaped and tubular processes (petasma).

In each of the four well-developed anterior pairs of pleopods, medially (inwardly) directed process at base of endopod. Serves to link pleopods together for swimming.

Medially (inwardly) directed process of each pleopod. Serves to link pleopods of each somite together for swimming.

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Category: Crustaceans
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