There are three species in
this genera, P. ananas, P. cristata and the
more well knownP.
the first two being described bySousa and
P. ananas has lateral plates with two or more
series of spines; depth of superior wing of lateral
plates equal to or less than that of inferior wing;
coracoid processes narrow and converging toward central
axis of the body; adipose fin usually absent. Physopyxis
ananas can be distinguished from other Physopyxis
species by presence of at least one additional row
of spines on dorsal wings of lateral plates, above
lateral line. Additionally, P. ananas differs
by having a more slender, slightly convergent and
pointed coracoid processes vs. coracoid processes
more robust with knob-like divergent tips in P.
lyra. Physopyxis ananas also differs
by having a complete series of lateral line plates
vs. incomplete in P. cristata. Habitat:
Physopyxis ananas has the widest distribution
among the species of the genus, occurring throughout
lowlands in entire Amazon (including rio Negro) and
Rio Essequibo basins. 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.
Amazon (including Negro River) and Essequibo River
basins. Type locality: utaí
River, Solimões River basin, Amazonas State,
Brazil (02º45'40''S; 66º47'59''W).
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.
2017. FishBase. World Wide Web electronic publication.
www.fishbase.org, ( 02/2017 ). Sousa, L.M. and L.H.
2005 Description of two new species of Physopyxis
and redescription of P. lyra (Siluriformes: Doradidae).
Neotrop. Ichthyol. 3(4):625-636.