Loricariichthys nudirostris is a species of freshwater ray-finned fish belonging to the family Loricariidae, the suckermouth armored catfishes, and the subfamily Loricariinae, the mailed catfishes.. It is endemic to Brazil, where it occurs in the Amazon River basin in the states of Amazonas and Pará. This species reaches a maximum standard length of , can weigh up to at least , and is believed to be a facultative air-breather.
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