SCOTCAT.COM
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The
first recorded spawning of
Corydoras guianensis Nijssen, 1970 |
| by Mel Rushmore |
I actually ordered a full box from Michael Huthart of Northern Aquatics as a result of being kindly given a group of 4 male CW015 which had themselves been imported as C. guianensis (Hoplisoma guianense) however the females that also arrived with them did not make it through import and quarantine. In a later shipment I was expecting to receive CW015 but also hoping that I might get a mix including females to go with the males Ian Fuller of Corydoras World had kindly given me. When the box finely arrived they were all C. guianensis (Hoplisoma guianense) and I was greatly thrilled.
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Hoplisoma guianense - male
Hoplisoma
guianense -
female They are kept at 25 degrees (77°F) dropping to around 21-22°C (67-71°F) with water changes, p.h is 6.5, tds was 99 at the time of the spawn and they laid mainly on a moss ball and the underside of java fern with one or two on the filter and glass. Eggs were laid between 2 and 4 at a time and very sticky so I split the batch and tubbed them separately using my preferred Esha 2000 anti fungal in one tub and a small alder cone in the other for the first 24 hours. I use Esha as its easier to gauge a dose but interestingly the tub with Esha despite having fertile eggs didn't yield any young at all but the ones I did get were in the tub with the alder cones. The eggs were around 1.75 mm in size.
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first purchased 13 of these rare Suriname cory's in
late May of 2018 and let them settle into my old fish
room while I was building my new one and only transferred
them to the new fish room at easter this year (2019).
This much sought after species comes from the coastal
rivers of Suriname and French Guiana with the type locality
of a creek on the right bank of Nickerie River, 12km
of Stondansi Falls, Suriname. Corydoras guianensis
( now Hoplisoma guianense) is placed in Lineage
9, the "short-snouted" species with the designated
type species: C. punctatus. A revision in the
future would constitute the resurrection of the genus
name Hoplisoma (Agassiz, 1846). Update:
As of the latest revision (Dias
et al 2024) Corydoras guianensis
has now been placed in Lineage 9 and has the new genus
name of Hoplisoma and a change to the specific
name to guainense.
Distrbution: Coastal rivers of Suriname and French Guiana. Type Locality: creek at right bank of Nickerie River, 12km of Stondansi Falls, Suriname. |
Eggs on a moss ball
Hoplisoma guianense - newly hatched fry I have only nine live fry at the time of asking (22/10/19) but only one maybe two females spawned from six plus in my group of 13. To be honest I think I pulled the eggs a little bit too early but the group arrived wild caught with youngsters in the mix which are only just maturing and I was prepared to risk damaging eggs over them potentially being eaten. The water in both tubs was changed at 50 percent daily until day of hatching, 3-4 days, with water taken from the parent tank and when hatched fry were moved to a new tub again filled with water from the parent tank. Below are the following images of the fry through to the 8 weeks stage.
Hoplisoma guianense - newly hatched fry
Hoplisoma guianense - 3 weeks old
Hoplisoma guianense - 8 weeks old
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Spawning details |
Species: 6
females, 7 males |
References |
| Alexandrou,
Markos & Taylor, Martin. (2011). Evolution,
ecology and taxonomy of the Corydoradinae revisited. |
Photo Credits |
Author |
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