Figure 23. Sesarmidae. a-b in The morphological and functional variability of pleon-holding mechanisms in selected Eubrachyura (Crustacea: Decapoda)

Figure 23. Sesarmidae. a-b: Neosarmatium trispinosum Davie, 1994, ♀, 8 × 8 mm, Australia (AM P.68315). (a) Thoracic sternum with pleon in folded position. (b) Thoracic sternum without pleon, small sternal button visible. c-d: Perisesarma messa (Campbell, 1967), ♀, 13 × 11 mm, Australia (AM P.64802). (c) Thoracic sternum without pleon. (d) Ventral surface of the pleon. B: button; ed: edge; n: notch; pl: pleopods; P6: pleon segment 6; s: setae; sac: sterno-abdominal cavity; S5: sternite 5; t: telson; v: vulva. Scale bar = 2 mm.