Britto & Lima, 2003
his Corydoras is like one of those
intriguing conspiracy stories where you don't know fact from fiction.
What has that got to do with a Corydoras I hear you ask!.
Well when this Cory was first photographed in 1997 in the Japanese
magazine "Aquamagazine" and then imported to the U.K.
about the same time, Corydoras sp. reynoldsi "Asher"
was the name that they were imported with, and the vote was split
down the middle amongst the top Cory breeders in the U.K. whether
this was indeed the true Corydoras reynoldsi or indeed a
new species still to be described. This Cory has been given the
From information given to me by
one of the top U.K. Cory breeders, Ian Fuller, according
to Hans-Georg Evers, the German aquarist, breeder and author,
Corydoras sp.cf.reynoldsi or Corydoras sp.
reynoldsi 'Asher' is indeed the real C. reynoldsi
and he has had his thoughts confirmed by Stanley Weitzman who
described the original species in 1960. Asher Benzaken is the
name of the exporter of this fish from the port of Manaus, Brazil
and who has a fish farm in this area.
Well you might just say that that is the mystery solved then,
but hold on there is another twist to the story. another of the
top U.K. Corydoras breeders, Jim Makin, has verified
that he bred Corydoras reynoldsi in the early 80's and
the males did not have the longer dorsal that these 'asher' have
and they also bred not unlike Corydoras paleatus with lots
of small eggs in a mass. The difference with sp 'asher' is that
they lay small amounts of eggs here and there and the eggs are
the largest I have ever seen from a Cory, a whopping 2.2mm in
size. Jim has bred and raised this larger egged species and I
have also had eggs and raised the fry from my collection, and
the sizes do match up. The females
I found to grow that little bit larger than the males.
Another bone of contention is the body pattern.
As you can see in the above picture there are two large blotches
on the body, one at the posterior of the dorsal running down to
the ventral fins and the other bridging the area akin to the adipose
and anal fins. There is also a small dark patch running down the
back and a black band running through both eyes. In the original
line drawing below of Corydoras reynoldsi there is also
two blotches in the same area but they don't spread down through
the body, are only small with the dorsal/ventral spot being broken
in two. The body shape of these two illustrations are very much
alike so one wonders if it is only a pattern variation which occur
in the wild from different locations and they are indeed one and
the same fish.
||Corydoras reynoldsi Myers &
Weitzman, 1960, holotype
(reproduction of illustration in Myers & Weitzman, 1960,
To add even more confusion to this scenario
is that there is a long-nose version of this species which is
identical in every aspect apart of course in the longer snout.
This species hails from the tributaries in the upper Rio Negro,
Brazil, so could our sp "asher" also come from this
same area and live alongside its larger cousin, as the
port of Manaus the export station, is of course down the Rio Negro
with its confluent with the Amazon River. So you can make your
own mind up until we are told by the ichthyologists, when they
get round to working with this species, if indeed they are one
and the same species.
Now that we move away from the scientific bit, how do we keep
this Corydoras. From my experiences they are very easy
and adapt to most water conditions as long as they are not too
diverse. They do nicely in a small group and you can tell the
girls from the boys by the longer dorsal in the smaller male and
the fuller and larger body of the female.
Jim Makin and Ian Fuller of the Catfish
for their input and also to Jim for providing the original
papers and article on Corydoras reynoldsi.
Update; August 2003.
I am know led to believe that this species is indeed the true
Corydoras reynoldsi confirmed to me by the German aquarist
and author Hans-Georg Evers. The C-number, C064, has now been
Update; December 2003.
The new name of Corydoras tukano has now been given to
this species by Marcelo R.Britto of Departamento
de Vertebrados, Museu Nacional da Universidade Federal do Rio
de Janeiro Brazil, and Flávio C.T.Lima.
The ichthyologists have finely finished work on this Cory and
you can read a short abstract
on their published
work on ScotCat.
Small round head. Male dorsal fin longer than
Two large blotches on the body, one at the
posterior of the dorsal running down to the ventral fins and the
other bridging the area akin to the adipose and anal fins. A small
dark patch running down the back and a black band running through
This is akin to most of this genus, very peaceful,
and would be best housed with small to medium tankmates such as
Tetras, Rasboras and Danios or in a
species tank for breeding purposes.
I set up 2 males and a female in a 18"
x 12" x 12" tank with sand, Java moss, Java fern and
a sponge filter. They laid 11 eggs scattered throughout the aquarium,
high on the glass and also low on a flower pot. The water parameters
were a P.h.of 6.5 and water temperature of 76F, K.H., 3., G.H.,1. The
eggs are large measuring 2.2mm and the largest of any Corydoras
that I have bred. Unfortunately the eggs did not hatch and were
not viable. They also laid eggs about a week later but they were
not fertilised either. I have since then purchased more of this
species and I hope to record some success with this most beautiful
of Corydoras at a later date.
The usual fare for adult Corydoras, a good quality flake
food, tablet food, frozen bloodworm and whiteworm used sparingly.
Update: I have now bred and raised the fry and and you
can now find this article
on Ian Fullers, Corydoras World website.
= helmeted; doras = leathery
skin,(helmeted Doras) cuirass.
Myers & Weitzman,1960:(figs.
1, 10; table 11 H). Aqualog News, First import of the beautiful
plated cat Corydoras sp. aff. reynoldsi.
Top picture: Allan
Bottom picture: Helen Burns