his months factsheet is aCorydoras
but as seen in the acompanying photograph it has a
longer snout. It grows larger than arcuatus
with a size of 7cm whereas the latter grows to 6cm.
Not a very common cory in the U.K. and only appears
sporadically in the retailers as most of the long-nose
Corydoras seem to do.
They are usually
quite pricey when they do appear in the retail outlets
stopping most aquarists from buying a few specimens,
hence the lack of success of spawning them. But if
you have spawned them please let me know so I can
share it with the online community.
As with most of
the longer nosed cory's, care must be taken regarding
water quality as they don't seem to be as hardy as
the normal short nosed varieties. They also like a
good water movement in the aquarium, so an internal
filter would be a good idea. Corydoras narcissus
occurs sympatrically with C. arcuatus.
The original specimen
was collected by Axelrod, Bleher, Bossche, Gery and
Schwartz in a creek flowing into the Rio Ipixuna,
7°31'S, 63°16'W, 30 km west of Humaitá,
Rio Purus system, Amazonas, Brazil.
narcissus- head view
(The science that treats of the origin and history
of words and modification of a particular word) of
narcissus is for the Greek river god Kephissus
who fell in love with his own reflection in the water
in memory of those who collected undescribed species
of Corydoras and suggested their own names
for the scientific description. There is one man,
who will not be named here, who I believe was the
architect for this story.
Remarks:This is a "saddle nosed" species
which would place it in Lineage 1.
When there is a revision they will stay as Corydoras
(Lacépède, 1803) with the type species
of C. geoffroy La Cépède, 1803.
Rio Ipixuna on Paranapixuna, a tributary of the Rio
Purus, 30km west of Humaita.
Male: 7.5cm (3ins) Female:
Dorsal 1/7; Anal 1/5; Pectorals;
1/10. Two pairs of rictal barbels, one pair of mental
barbels; rictal "flap" present. Medial border
of pectoral fin spine strongly serrate. Intercoracoid
area naked. Pectoral fin spine covered with thick
mucous skin, embedding conspicuous odontodes. This
my be an indication that the holotype is a nuptial
male, since in some species with a strong secondary
sexual dimorphism (Corydoras barbatus, C.macropterus,
C.octocirrus) the pectoral fin spines of mature
males show a similar cover.
Ground colour of head and
body whitish. Area dorso-posterier to eye with widely
scattered black pigment, forming a conspicuous uneven
stripe from the anterior edge of the nuchal plate
to the posterior of the last dorso-lateral body
scute. The contour of this stripe is straight to
below the adipose fin spine, after which it bends
down and forms a vague concentration of pigment
on the caudal peduncle. A thin black line is visible
on the body below the dorsal fin spine. Widely scattered
black pigment on the snout, obliquely running forward
from the eye. Dorsal pair of rictal barbels greyish.
The two branched caudal fin rays, just dorsal to
the lower principal unbranched ray are black coloured.
A similar, though less intense pigmentation is present
in the opposite lobe. Upper half of dorsal fin spine
and adjacent branch of first dorsal fin ray with
black pigment. Adipose fin with black pigment on
posterior edge. Remaining fins clear.
Care & Compatibility
As this is one of the longer
snouted species it will be well suited to most community
tanks. A well planted tank with a soft substrate such
as sand so they can bury their snouts while searching
There is a breeding report
that the eggs are very tiny and are laid in two's around
the tank and usually in the flow of an internal filter
much like Corydoras aeneus. Temperature was quite
high at 25c (77f) with a pH.of 7.8.
As per usual for the fry (if
you are lucky enough to breed them.) with microworm,
brine shrimp naupli and egglayer fry food after they
have used up their yoksac.
skin,(helmeted Doras) cuirass. narcissus:
Named after Narcissus, son of the Greek river god,
Kephise. According to Greek mythology, a young man
named Narcissus was so fascinated when he looked into
still water that he fell in love with the beauty of
his own reflection.
Markos & Taylor, Martin. (2011). Evolution,
ecology and taxonomy of the Corydoradinae revisited.
Fuller, Ian A.M. &
Identifying Corydoradinae Catfish. 2005. 384 p.
Ian A. M. Fuller &
Hans-Georg Evers (2011). Identifying Corydoradinae
Catfish Supplement 1. Ian Fuller Enterprises.
Nijssen, H and Isbrücker, I. J. H.Three new Corydoras species from French Guiana and
Brazil (Pisces, Siluriformes, Callichthyidae) Netherlands
Journal of Zoology 30(3); 494-503 (1980). Seus, Werner:
Corydoras, The most Popular armoured catfishes of South