Peramphithoe humeralis has a biramous uropod 3, with both rami shorter than the peduncle (photo). The inner ramus of uropod 3 is paddle-like while the outer ramus has 2 curved spines (photo). The antennae have no accessory flagellum (photo). Uropod 1 has a distinct tooth based on the peduncle and extending ventrally between the two uropod rami (photo). The proximal flagellar articles of antenna 2 are not fused (photo). Article 5 of gnathopod 1 is longer than article 6 (photo), and pereopod 7 (the last one) is longer than pereopod 6 (photo).
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The Blue Planet (2001)