FIGURE 4 in Revision of Alpheus euphrosyne De Man, 1897 and A. microrhynchus De Man, 1897, with description of three new species and taxonomic remarks on several other morphologically and ecologically similar snapping shrimps (Malacostraca: Decapoda: Alpheidae)

FIGURE 4. Alpheus euphrosyne De Man, 1897: chelipeds of male (cl indet.) from Sumatra, Indonesia (ZMA Crus.D.202726) showing main features and terminology used in the present study; A—major (right) cheliped, lateral view; B—same, mesial view; C—minor (left) cheliped, mesial view; D—same, lateral view. Abbreviations (in alphabetical order): ad—adhesive disks (plaques) on dactylus and palm (small on major chela, highly reduced in minor chela); be—balaeniceps expansion of minor chela dactylus; ddr—dorsal ridge of major chela dactylus (dactylar dorsal ridge); dla—dorsolateral angle of major chela pollex; dlt—dorsolateral tooth of major / minor chela palm; dma—dorsomesial angle of major chela pollex; dmt—distomesial tooth of major / minor chela palm; dp—plunger of major chela dactylus (dactylar plunger); ds—dorsal shoulder of major / minor chela palm; dtg—dorsal transverse groove of major / minor chela palm (also known as dorsal notch); lbd—lateral balaeniceps ridge of minor chela dactylus; lbp—lateral balaeniceps ridge of minor chela pollex; li—linea impressa of major / minor chela palm; lld—lateral longitudinal depression (groove) of major / minor chela palm; ltr—smooth lateral transverse ridge of major chela palm (often poorly developed); mbd—mesial balaeniceps ridge of minor chela dactylus; mbp—mesial balaeniceps ridge of minor chela pollex; mld—mesial longitudinal depression (groove) of major / minor chela palm; msr—mesial subdistal ridge on major chela pollex; mtr—smooth mesial transverse ridge of major chela palm (often poorly developed); pf—fossa (socket) of major chela pollex; vs—ventral shoulder of major / minor chela palm; vtg—ventral transverse groove of major / minor chela palm (also known as ventral notch).