Figure 2 in Setogenesis and characterization of the new moult substages in the freshwater shrimp Palaemon argentinus (Nobili, 1901) (Caridea: Palaemonidae)

Figure 2. Uropod microphotography of Palaemon argentinus, pre-moult substages. a, D 0: formation of the epidermal line with the distance of the epidermis toward the setal matrix indicates apolysis. b, D ': new setae crossing the gap and reaching the setal base 1 of the old setae. c, D '': epidermis invagination around the setal axis. d, D ''': new setae inserted in the setal cone of old setae; setal 1 1 axes more visible. e, D 2: last pre-moult stage; setal axis pigmented. f, Ecdysis, shedding of the new setae from the setae of the old exoskeleton. Abbreviations: e.l, epidermal line; s.m, setal matrix; ↔ apolysis; n.s, new setae; s.b, setal base; e, epidermis; s.a, setal axis.