e concentrate this month on the last of the three
so called "Dwarf Cory" factsheets. We have
compiled already on C.
and this months subject, C. pygmaeus, is
probably the easiest to keep of these three.
This small Corydoras
has a lot going for it as it is easy to keep and breed
and has been popular with Cory enthusiasts even although
there has been an influx of C-numbers to even challenge
the many L-numbers of the huge, in numbers, Loricariidae
This Cory has
even done well on the show bench at fish shows up
and down the country as it is small, and if in good
condition can be hard to beat.
- showing good healthy barbels
C. pygmaeus is
a bit like C. hastatus in that it likes to
shoal in midwater and as such should be kept in a
group of at least six. Substrate can be of fine sand
and plants such as java moss and java fern can be
used alongside rockwork for further effect. If kept
in a species tank for breeding, a fine substrate,
java moss and a sponge filter would suffice with weekly
50% water changes to keep the water pure.
is placed in Lineage 4 which includes two of the dwarf
species and a revison would be a resurrection of the
disused Microcorydoras (Myers, 1953) with
the designated type species: C. hastatus.
Brazil, Tributaries of the Rio Madeira, near Calama.
Ecuador, Tributaries of the Rio Aguarico. Peru,
Rio Nanay, west of the city of Iquitos. Type
locality: einem Nebenfluß des Rio Madeira
Male: 2.5cm (1ins) Female:
Head, short and compact.
Ground colour of head and body
grey/green. A blackish line runs from the tip of the
snout through the junction of the body scutes and
ends at the caudal peduncle, where it broadens out
into a triangular shape. Dorsal parts of dorsolateral
body scutes with darker pigment on the posterior edges.
Ventrolateral body scutes creamy white except for
a dark line which runs from the ventral fins to the
Care & Compatibility
Best kept in a species only
tank but can be housed in a small community tank if
co-inhabitants are picked carefully; such as small
tetras and dwarf rasboras.
will breed in typical Corydoras T-mating
fashion with usually one single egg laid on plants
or the aquarium glass, they can lay up to 100 eggs
this way. The parents very rarely predate on the eggs.
The resulting fry are quick growing on a diet of microworm
and crushed flake. You can access the breeding section
on Corydoras spawning methods here.
Females are noticably heavier
when in breeding condition. They also grow larger than
the smaller males.
Small foods such as microworm,
grindal worm, good quality flake and tablets. Frozen
foods such as bloodworm.
The fin forward from the anal cavity. Caudal Peduncle: The area between the
dorsal fin and the tail. Dorsolateral: Extending from the top
to the side. Ventral Fin: The paired fins, between
the pectorals and the anal fins. Ventrolateral: Extending from below
and to the side.
skin,(helmeted Doras) cuirass. pygmaeus: From the Latin
pygmaeus = 'dwarf', alluding to its small
Markos & Taylor, Martin. (2011). Evolution,
ecology and taxonomy of the Corydoradinae revisited. Catfish
Association Great Britain: Volume
1. 1983; 138 p. Fuller, A.
M. Ian; Breeding Corydoradine Catfishes.
Ian Fuller Enterprises, Kidderminster.
Ian A. M. Fuller & Hans-Georg Evers (2011).
Identifying Corydoradinae Catfish Supplement 1. Ian