FIGURE 4. P5 dactylus terminal corneous ridges. A, D, F, Chaceon linsi n in A new species of Chaceon Manning & Holthuis, 1989, from the southwestern Atlantic, with a key to the western Atlantic species (Crustacea, Decapoda, Geryonidae)

FIGURE 4. P5 dactylus terminal corneous ridges. A, D, F, Chaceon linsi n.sp., male holotype cl 136 mm, cw 149 mm (MZUSP 22287). B, E, G, Chaceon sanctaehelenae Manning & Holthuis, 1989, male holotype cl 112 mm, cw 134 mm (USNM 125510). C, H, Chaceon fenneri (Manning & Holthuis, 1984), female paratype cl 90 mm, cw 113mm (USNM 71003). Scale bars: A, D, 6 mm; B, 3.8 mm; C, 4.3 mm; E, 3.2 mm; F, 12 mm; G, 10 mm; H, 11. 5 mm.