Vertebrae: 26. This species is distinguished from
its congeners except H. elongatum, by the
presence of a patch of odontodes on the anterolateral
surface of the cleithrum at the opening to the branchial
chamber. It is distinguished from H. elongatum
by having a shorter caudal peduncle, with caudal-peduncle
length 26.0-36.0 (32.0) (vs. 32.3-36.3 (34.4); t-test,
p < 0.001); with a deeper, more robust caudal peduncle,
caudal-peduncle depth 8.8-11.0 (10.1) (vs. 7.9-8.8
(8.4); t-test, p < 0.001); by the round to slightly
acute snout (vs. snout appearing pointed due to slight
lateral inflexion between rostral plate and first
infraorbital); by fewer plates along medial series
21-22 (22) (vs. 23). Habitat: It
is the only species known for northeastern coastal
rivers. Colouration: By having light
brown caudal-fin lobes (vs. dark lobes). Aquarium
Care: Will not bother other fish in the aquarium.
They like to hang on to thin stalks of plants so they
can see around it with their laterally located eyes.
Provide shaded hiding areas in the tank with rocks
or cave-like structures. Diet: Feed
an all round diet but prefers a vegetable diet such
as algae, spirulina tablets and cucumber/courgette.
Across the central and lower Rio Amazonas basin; including
Rio Tocantins basin.
Aquino, A.E. and S.A.
Systematics of the genus Hypoptopoma Günther,
1868 (Siluriformes, Loricariidae). Bull. Amer. Mus.
Nat. Hist. 336:1-110. Froese, R. and D. Pauly. Editors.
2022. FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 08/2022 ). Vieira LO, Campos DS, Oliveira RF, South J,
Coelho MS.P, Paiva MJ.S, Bragança PH.N, Guimarães
EC, Katz AM, Brito PS, Santos JP, Ottoni FP
(2023) Checklist of the fish fauna of the Munim River
Basin, Maranhão, north-eastern Brazil. Biodiversity
Data Journal 11: e98632.