Abstract

ABSTRACTAmpithoe is one of the most diverse genera of Ampithoidae, commonly found in shallow waters associated with algae. This genus is distinguished by the absence of antenna 1 accessory flagellum, pereopods 5–7 not prehensile and uropod 1 spur absent. From Brazil, only four species are hitherto known, which are A. thaix, A. robustimana, A. ramondi and A. marcuzzii. In the present study, we describe a new species of Ampithoe from Todos-os-Santos Bay, Northeastern Brazil, found associated with the sponge Clathria. The new species is unique by showing mandibular palp thin and reduced, male gnathopod 1 propodus palm very short and setose, male gnathopod 2 propodus palm acute, with a tooth near hinge of dactylus. A taxonomic key to Ampithoe of the world is provided.http://www.zoobank.org/urn:lsid:zoobank.org:pub:F1FF8E18-BCDA-45F7-8B42-85552B094707http://www.zoobank.org/urn:lsid:zoobank.org:act:49F7BB4F-8AF5-46DA-B470-10114085E420

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