SCOTCAT.COM
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FACTSHEETS: April 2021 - no. 298
Corydoras sp. (CW030) |
Corydoras sp. (CW030)
For any new hobbyists to the world of Corydoras I will explain the CW system which was implemented by Ian Fuller of Corydoras World and is internet based. The German magazine DATZ stopped the C-number coding system with C159 but there were still unidentified species still arriving in the hobby so in 2006 Ian Fuller who runs the Corydoradinae website, www.corydorasworld.com decided to carry on with this same coding method with his CW (Corydorasworld) numbers. The latest number as of April 2021 is CW169. The CW number system is mainly internet based and is published through his site. When any CW-number is described the corresponding number will be retired.
Corydoras sp. (CW030) - young male
Corydoras sp. (CW030) - 1 month: 9.5mm. SL
This species entered the hobby in Germany and the U. K. in 2007. It 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 Hoplosoma (Agassiz, 1846). Information on the Lineage system: In 2005 the book Identifying Corydoradinae Catfish by Ian A. M. Fuller and Hans-Georg Evers (2005) was published and at that time little was known about the relationships among different species in the Callichthyidae as a whole and even less was known about the relationships among the Corydoradinae. This was changed in 2011 with the publication of the molecular phylogeny of the group: Evolution, Ecology and Taxonomy of the Corydoradinae revisited: Markos A Alexandrou & Martin I Taylor (2011), which was published in the follow up book in 2011, Identifying Corydoradinae Catfish Supplement 1. Our factsheet species resides in Lineage 9. A total of 200 preserved individuals, representing over 120 different species (including all mimetic taxa), were photographed and used for digital landmark-based morphometric analysis of body shape. To find out all of the lineages just click this link. To see all the species in their designated lineage visit this link.
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Distrbution: South America. Brazil, Roraima, near Boa Vista. Rio Branco drainage. |
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Common Name: |
CW030, Corydoras sp. Vitoria' |
Synonyms: |
None |
Family: |
Callichthyidae |
Subfamily: |
Corydoradinae |
Distribution: |
South America: Brazil, Roraima, near Boa Vista. Rio Branco drainage and close to the border with Guyana. |
Size: |
Male: 4.0cm (1½ins) Female: 4.5cm (1¾ins) |
Temp: |
20-25°C (67-77°F) |
p.H. |
6.0-7.2. |
Characteristics |
Short and compact with a short snout. |
Colouration |
Depending on water parameters, yellowish to silver/grey body with a black colouration to the dorsal spine which carries on onto the nape of the neck to the begging of the eye. The eye can have a black ring encircling it. The top half of the body and head can have very fine spots. Juveniles have blotches and spots to the body which disappears into adulthood. All fins are hyaline. |
Aquarium Care & Compatibility |
This is akin to most of this genus, very peaceful, and would be best housed with small to medium sized tankmates such as Tetras, Rasboras and Danios or in a species tank for breeding purposes. Best to purchase 6 individuals or more as they will be happier in a group. |
Reproduction |
Has been bred in aquarium conditions by Ian Fuller of Corydorasworld.com by lowering the pH to around 6 with twice weekly water changes and with a temperature of 24.4°C (76°F). They laid their eggs onto the underside of Anubias leaves with a few on polyester spawning mops (Fuller, I.A.M. 2009). To see all the Corydoras breeding articles visit this link. |
Sexual differences |
Females are stockier in the body with rounder anal fins. Males are slimmer with pointed anal fins. |
Diet |
Readily accepts a mixed and varied diet which includes granular foods, tablet food, frozen and live bloodworm, whiteworm, Daphnia and a good quality flake. |
Glossary of Terms |
Hyaline:
Transparent or clear without pigment. |
Etymology |
Corydoras: Cory = helmeted; doras = leathery skin,(helmeted Doras) cuirass. |
References |
www.corydorasworld.com |
Photo Credits |
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Other Sources
Online Sources