Figure 4 in The morphological and functional variability of pleon-holding mechanisms in selected Eubrachyura (Crustacea: Decapoda)

Figure 4. Pleon-holding structures of Gecarcinucidae. a-c: Nautilothelphusa zimmeri (Balss, 1933), ♂, 37 × 37 mm, Indonesia (ZRC2000.1707). (a, b) Thoracic sternum with and without pleon. Note button not covered by pleon in b. (c) Ventral surface of pleon. D-E: N. zimmeri, ♀, 32 × 33 mm, Indonesia (ZRC2000.1707). (d) Thoracic sternum without pleon, button present. (e) Ventral surface of pleon, no socket present, eggs attached to pleopods are visible. A: anterior; B: button; E: egg; i: intestine; sac: sterno-abdominal cavity; so: socket; S5: sternite 5; P: posterior; pl: pleopod; P6: pleon segment 6; t: telson; v: vulva. Scale bar = 5 mm.