Vertebrae: 25. This species is distinguished from
its congeners except N. sternoptychum, by
the pattern of abdominal plates, consisting of a pair
of slender plates posterior to the coracoids followed
by a series of 1-3 unpaired medial abdominal plates
(vs. 2-3 series of abdominal plates), by having the
posterior process of the coracoids strongly curved,
the distal tip pointing dorsally (vs. posterior process
smoothly curved, with distal tip pointing posterodorsally),
and by the absence of basipterygium fenestrae (vs.
with basipterygium fenestrae). It is distinguished
from N. sternoptychum by the absence of thoracic
plates and fewer total lateral plates 20-22 (20) (vs.
21-22 (21)), fewer dentary teeth 20-31 (24) (vs. 21-37
(30)), narrow dorsal interorbital distance with mean
dorsal interorbital distance of 58.5 (vs. 63.5), pelvic
fin placed more anteriorly and mean abdominal length
12.7 (vs. 15.5), shorter pectoral fin; length not
reaching anal-fin origin with mean pectoral-fin spine
length 29.8 (vs. 39.3), and by the absence of marginal
odontodes (vs. marginal odontodes present in adults
longer of 35 mm SL). Habitat: The
species of Nannoptopoma typically occur in
streams of slow to moderate current and muddy to sandy
bottom with marginal emergent vegetation. Aquarium
Care: A small tank with water which must
be very clean and well oxygenated. Don’t house
with other loricariids that would compete for food.
Diet: Like other Nannoptopoma,
taking large amounts of vegetation. A high metabolic
rate means that they require large volumes of food
that will not pollute.
Amazon and Orinoco River basins, Colombia. Type
locality: Quebrada Cramalote, 4º07'N,
73º36'W, Dpto. Meta, Villavicencio, Colombia.
Aquino, A.E. and S.A.
Schaefer 2010 Systematics of the genus Hypoptopoma
Günther, 1868 (Siluriformes, Loricariidae). Bull.
Amer. Mus. Nat. Hist. 336:1-110. Delapieve, M.L.S., P.A. Lehmann and R.E. Reis,
2017. An appraisal of the phylogenetic relationships
of Hypoptopomatini cascudinhos with description of
two new genera and three new species (Siluriformes:
Loricariidae). Neotrop. Ichthyol. 15(4):e170079..
Evers, H.-G. & I.Seidel:
Mergus, Baensch Catfish Atlas Volume 1, 1st English
edn., 2005. Pp.944. Ferraris, C.J. Jr., 2007. Checklist
of catfishes, recent and fossil (Osteichthyes: Siluriformes),
and catalogue of siluriform primary types. Zootaxa
1418:1-628. Froese, R. and D. Pauly. Editors.
2022.FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 02/2022 )