Figure 13 in The morphological and functional variability of pleon-holding mechanisms in selected Eubrachyura (Crustacea: Decapoda)

Figure 13. Pleon-holding mechanism of the trichodactylid crab Trichodactylus fluviatilis Latreille, 1828. a-b: ♀, 29 × 26 mm, Brazil (ZMK1567). (a) Thoracic sternum without pleon. (b) Ventral surface of pleon. c-d: T. fluviatilis Latreille, 1828, ♂, 21 × 18 mm, Brazil (ZMB21540). 3D volume and surface reconstruction from µCT images. (c) Complete specimen in three-quarter view. Pleon not firmly attached. (d) Same specimen, telson and pleon segment 6 virtually removed. Buttons visible inside sterno-abdominal cavity (arrow). A: anterior; fl: flat surface of P6; P: posterior; pl: pleopods; s: setae; sac: sterno-abdominal cavity; S5: sternite 5; t: telson; v: vulva. Orange: telson; red: buttons; yellow: pleon segment 6. Scale bar = 5 mm.