Dorsal soft rays (total): 8-9; Anal soft rays: 5 -
6; Vertebrae: 28. Distinguished from all congeners
by possessing dorsal-fin spinelet (vs. absent); transverse
dark saddles on the dorsum absent (vs. present); subocular
cheek plate always absent (vs. generally present);
and odontodes on lateral plates aligned in well-defined
series (vs. randomly distributed). It can be diagnosed
from Pseudotothyris obtusa by having abdomen
almost entirely naked, except for one to three lateral
abdominal plates and one to two preanal plates (vs.
abdomen partially or totally covered by scattered
plates); 31-35 teeth on upper pharyngeal toothplate
(vs. 20-30); and 18-23 teeth on ceratobranchial 5
(vs. 12-15 ). It differs differs from Pseudotothyris
ignota by having the anterior margin of snout
completely covered by odontodes (vs. anterior margin
of snout with an odontode-free band). Habitat:
This species is found in the Rio da Taquara and the
Rio Lilico in the state of Rio de Janeiro and the
specific name is tantamount to this state. This species
is quite rare in its habitat due to pollution. Collected
from a lentic environment, regionally known as açude,
a kind of water reservoir. It is uncommon for Pseudotothyris
and for the majority of the members of Hypoptopomatinae
to occur in this type of habitat. Aquarium
Care: It has been reported that this a difficult
species to acclimatise to aquarium life and good water
management is a must. Diet: Artemia
naupli and vegetable foods.
Brazil, The state of Rio de Janeiro. Type
locality: Rio dos Macacos, Represa Engenho
da Serra, Paulo de Frontin, Rio de Janeiro, Brazil.
Martins, F.O., H.A.
Britski and F. Langeani, 2014. Systematics
of Pseudotothyris (Loricariidae: Hypoptopomatinae).
Zool. J. Linn. Soc. 170:822-874. Evers, H.-G. & I.Seidel: Mergus,
Baensch Catfish Atlas Volume 1, 1st English edn.,
2005. Pp.944. Froese, R. and D. Pauly. Editors.
2021. FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 06/2021 ). Ferraris, C.J. Jr., 2007. Checklist
of catfishes, recent and fossil (Osteichthyes: Siluriformes),
and catalogue of siluriform primary types. Zootaxa