FIGURE 5. Alpheus christofferseni n in Three transisthmian snapping shrimps (Crustacea: Decapoda: Alpheidae: Alpheus) associated with innkeeper worms (Echiura: Thalassematidae) in Panama

FIGURE 5. Alpheus christofferseni n. sp., male from Bocas del Toro, Panama (USNM 1100667): a, major cheliped, mesial view; b, same, distal merus, carpus and chela, lateral view; c, same, dactylus plunger, lateral view; d, minor cheliped, lateral view; e, same, distal merus, carpus and chela, mesial view. Scale bars: 1 mm.