MARESTB GAMMARIDEAN AMPHIPODA 



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Figure 48. — Aoridae, pereopods glandular, like Isaeidae but gnathopod 1 larger than 



gnathopod 2 and bearing male sexual modifications: a, coxa 4, note absence of posterior 



excavation; h, extremes of accessory flagellum; c,d, gnathopods 1, 2, note 1 larger than 2 



[see Isaeidae]; e,f,g,h, variation in uropod 3 [see Ischyroceridae, Corophiidae, Cheluridae]; 



i, telson, short, thick, fleshy. 



See Isaeidae for characters differentiating genera with uniramous uropod 3 from families 



with uniramous uropod 3. Podoceridae have elongate urosomite 1. Cheluridae have coalesced 



urosomites 1-3. Corophiidae have depressed urosomes. Ischyroceridae and Ampithoidae 



have elongate peduncles of uropod 3, Ampithoidae have characteristic lower lips. 



