The Phalloceros uai lives in the benthopelagic, freshwater environment.
Phalloceros uai is autapomorphically diagnosed by a lateral spot wide and square-shaped in large specimens (Fig. 40). Moreover, P. uai can be distinguished from its congeners but P. megapolos, P. spiloura, P. malabarbai, P. alessandrae, P. buckupi, P. anisophallos, P. More