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Hypoptopoma incognitum Aquino & Schaefer, 2010

Image contributors to this species:

Lucas Vieira/Rafael Oliveira (1) Johnny Jensen's Photographic Library (2)

ScotCat Sources:

Other Sources:

Relevant Information:

Description: 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. Etymology: The specific name incognitum: Latin for unknown, referring to its previous misidentification as other species of the genus.

Common Name:

None

Synonyms:

None

Family:

Loricariidae

Distribution:

South America: Across the central and lower Rio Amazonas basin; including Rio Tocantins basin.

Size:

11.0cm. (4¼ins)

Temp:

18-26°c (63-79°f.)

p.H.

6.0-7.0.

IUCN Red List

Despite the little information available on this species, it has a wide range and no apparent threats. Therefore, it is assessed as Least Concern, (IUCN 2023).

Reference:

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.
Froese, R. and D. Pauly. Editors. 2022. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 08/2022 ).
Salvador, G.N. 2023. Hypoptopoma incognitum. The IUCN Red List of Threatened Species 2023.
The ETYFish Project Fish Name Etymology Database © Christopher Scharpf.
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.

Family: Loricariidae Back to Ident-A-Cat Click on Thumbnails

Hypoptopoma incognitum
Munim River Basin

Hypoptopoma incognitum

Hypoptopoma incognitum

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