Figure 2 in The morphological and functional variability of pleon-holding mechanisms in selected Eubrachyura (Crustacea: Decapoda)

Figure 2. Pleon-holding structures of Gecarcinucidae. a-d: Esanthelphusa dugasti (Rathbun, 1902), ♂, 50 × 40 mm, Thailand (ZRC2014.0020). (a) Thoracic sternum with pleon. Arrow indicates location of pleon-holding structures. (b) Thoracic sternum without pleon. (c) Close-up of left half-moon-like button; note striped appearance on anterior margin. (d) Ventral surface of pleon. e-g: Parathelphusa maculata de Man, 1879, ♂, 55 × 40 mm, Malaysia (ZRC, no catalogue number). (e) Thoracic sternum without pleon. (f) Closeup of right half-moon-like button. (g) Ventral surface of pleon. A: anterior; B: button; i: intestine; P: posterior; P6: pleon segment 6; s: setae; sac: sterno-abdominal cavity; so: socket; S5: sternite 5; t: telson. Scale bar = 5 mm except for c (500 µm) and f (2 mm).