A. nigricauda
Introduction '''''A. nigricauda''''' may refer to:* ''Acanthurus nigricauda'', the epaulette surgeonfish, a fish species* ''Amphisbaena nigricauda'', a worm lizard species  found in Brazil* ''Anaxibia nigricauda'', a spider species endemic to Sri Lanka
See also * Nigricauda (disambiguation)