[edit]Underside of a specimen of Pareiorhina hyptiorhachis.
Pareiorhina species all have lateral borders of the head without developed bristles, a naked abdomen, dorsal plates meeting along the mid-dorsal line between the dorsal and caudal fins, no adipose fin, ventral plates covering the midventral line, and the dorsal portion of body behind
dorsal fin flatenned (flat caudal peduncle with a rectangular cross section).[1]InP. carrancas and P. rudolphi, the teeth are simple, while in P. brachyrhyncha, the teeth have a minute lateral cusp at the base of the main cusp.[1]P. brachyrhyncha and P. carrancas are unique in lacking an adipose fin and azygous plates; in loricariids without an adipose fin, it is usually replaced by a series of azygous plates that form a ridge. However, these two species lack both the fin and the ridge.[1] These species range from about 4.1–4.5 centimetres (1.6–1.8 in) in length.
^ abcdefChamon, C.C.; Aranda, A.T. & Buckup, P.A. (2005). "Pareiorhina brachyrhyncha (Loricariidae: Siluriformes): A New Species of Fish from the Paraíba do Sul Slope of Serra da Mantiqueira, Southeastern Brazil". Copeia. 2005 (3): 550–558. doi:10.1643/ci-04-276r. S2CID84787580.
^Bockmann, F.A. & Ribeiro, A.C. (2003). "Description of a new suckermouth armored catfish of the genus Pareiorhina (Siluriformes: Loricariidae), from southeastern Brazil". Ichthyological Explorations of Freshwaters. 14 (3): 231–242.
^Silva, G.S.C., Roxo, F.F. & Oyakawa, O.T. (2016): Description of a new species of Pareiorhina (Siluriformes: Loricariidae) from the rio São Francisco basin, Brazil. Zootaxa, 4107 (3): 381-391.
