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Physopyxis
lyra Cope, 1872
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Image
contributors to this species: |
Daniel Blom (2)
Allan James (2) |
ScotCat
Sources: |
 
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Other
Sources: |
 
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Relevant Information: |
There are three species in this
genera, P. ananas, P. cristata and the more well known
P. lyra with the first two being described by Sousa
and Py-Daniel (2005). Physopyxis lyra differs from
the other species of the genus by possessing a single row of
spines on the lateral plates and a strong scapular girdle with
long, broad coracoid processes having distal tips enlarged and
divergent. outwards following expansion of process. Dorsal and
pectoral spines strongly ossified. Dorsal spine pentagonal in
cross-section with longitudinal groove along each lateral side,
serrate along basal portion of anterior margin, posterior margin
smooth. Pectoral spine well developed, depressed and curved,
its tip usually reaching anal-fin origin. It is usually found
in places with accumulated organic debris, like dense meshes
of roots of floating macrophytes that are abundant in rivers
with turbid water. Specimens also can be found among submersed
leaf litter and among root mats of riparian plants, like Symmeria
paniculata (Polygonaceae). Aquarium care:
Predominantly nocturnal, and spends most of day time sheltered
among submersed root mats or buried in sand. Diet:
Will eat most prepared foods such as sunken flake and tablet
foods but has a liking for frozen bloodworm. |
Common
Name: |
None |
Synonyms: |
None |
Family: |
Doradidae |
Distribution: |
South America:
Amazon River basin, Peru and Brazil. Type locality:
Amazon. Described in more detail in Cope (1872a: 273, pl. 5,
figs. 1a–1c), with locality as Ambyiacu River, Ecuador
(now Peru). |
Size: |
3.5cm. (1½ins) |
Temp: |
23-26°C (73-79°F) |
p.H. |
6.5-7.0. |
Reference: |
Sousa, L.M. and L.H. Rapp
Py-Daniel 2005 Description of two new species of Physopyxis
and redescription of P. lyra (Siluriformes: Doradidae). Neotrop.
Ichthyol. 3(4):625-636.
ScotCat
Factsheet no. 181. July 2011.
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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