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Hypoptopoma
thoracatum Günther, 1868 |
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Image contributors
to this species: |
Allan James (1) Peru
Aquarium Group (1) Mitsuhiro
Iwamoto (3) |
ScotCat
Sources: |
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Other Sources: |
 
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Relevant Information: |
This genus is recognised by the flat
head and large eyes that are set latterly on the head and their
heavy body armour. The ventral region is also armored and you
can sometimes identify a species by the pattern on the underbelly.
In saying that the species in this genus are notoriously difficult
to identify and most of the time you would need the location of
the catchment area or even down to the river itself to pinpoint
a certain species. Vertebrae: 27. This species is distinguished
from all congeners by having an elongated spot of black melanophores
along the caudal-fin branched rays, not distinctly connected to
the lanceolate plates at the base of the fin. The spot is extended
over a larger number of lower-lobe rays than upper-lobe rays and
along one-half to more than two-thirds of the ray length. Sexual
Differences: Male urogenital papilla short and slender,
covered by anterior flaplike anus. Males with patch of tightly
arranged small odontodes oriented as a swirl, variably covering
first to fourth plates of ventral series, lateral to urogenital
papilla. Males with flaplike anus along posterior margin of pelvic
spine variably developed; when present, short, weakly developed,
restricted to basal one-third to half of spine. Female anus tubular,
without separate urogenital papilla. In females, size and arrangement
of odontodes on plates lateral to anus similar to adjacent plates,
without distinct patch of differentially arranged odontodes. Female
pelvic spine without flap of soft tissue on posterior surface. |
Common Name:
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None |
Synonyms: |
None |
Family: |
Loricariidae |
Distribution: |
South America: Amazon
River basin. Type locality: Xeberos, upper Amazon
River, Peru. |
Size: |
8cm. (3¼ins) |
Temp: |
23-27°c (73-81°f.) |
p.H. |
6.0-7.2. |
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
Ferraris, C.J. Jr., 2007. Checklist of catfishes,
recent and fossil (Osteichthyes: Siluriformes), and catalogue
of siluriform primary types. Zootaxa 1418:1-628. |
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