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Ian Fuller (1)

Similar to CW020 which was thought to be C. arcuatus but has proven to be the CorydorasWorld code number CW036 (Corydoras arcuatus). Description: Dorsal spines (total): 1; Dorsal soft rays (total): 8; Anal soft rays: 8. Distinguished from all its congeners except Corydoras arcuatus, Corydoras narcissus, and Corydoras gracilis, by having a long, arched, dark stripe, running parallel to the dorsal profile and extending at least from the anterior margin of the first dorsolateral body plate to the caudal peduncle. Can be diagnosed from Corydoras arcuatus, Corydoras gracilis, and Corydoras narcissus in having the arc-like stripe terminating posterior to the orbit (vs. extending onto snout). Further differs from Corydoras arcuatus by having fewer free vertebrae (21 vs. 27); lateral profile of the snout distinctly rounded (vs. nearly straight); a greater preadipose distance (84.0-86.7% SL, vs. 82.9-83.8% SL); and the posterior limit of the cleithrum at a vertical through the dorsal-fin spinelet (vs. between the third and fourth dorsal-fin rays); from Corydoras gracilis by having fewer free vertebrae (21 vs. 27); arched stripe extending posteriorly to the base of the lower caudal-fin rays (vs. reaching the base of the upper caudal-fin rays); and the second infraorbital contacting only the sphenotic (vs. contacting both the sphenotic and compound pterotic); from Corydoras narcissus in having the arched stripe extending posteriorly across the lower caudal-fin rays (vs. extending over the lower caudal-fin rays); lateral profile of the snout distinctly rounded (vs. nearly straight); and minute and weak pectoral-spine serrations (vs. large and strong serrations). Lineage: 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 Hoplosopma (Agassiz, 1846). Aquarium Care: 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. Diet: Readily accepts a mixed and varied diet which includes granular foods, tablet food, frozen bloodworm and a good quality flake.

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Callichthyidae

South America: Brazil, Amazonas State, Coari Igarapé da Onça, Rio Urucu basin, tributary of Lago Coari, Rio Solimoes system.

3.0cm (1¼ins)

23-27°C (73-81°F)

6.5-7.2.

Alexandrou, Markos & Taylor, Martin. (2011). Evolution, ecology and taxonomy of the Corydoradinae revisited.
Britto, M.R., W.B. Wosiacki and L.F.A Montag, 2009. A new species of Corydoradinae catfish (Ostariophysi: Siluriformes: Callichthyidae) from Rio Solimões Basin, Brazil. Copeia 2009(4):684-689.
Froese, R. and D. Pauly. Editors. 2016. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 10/2016 ).
Grant S., 2014, Catfish Study Group Journal V15 - I4.
Ian A. M. Fuller & Hans-Georg Evers (2011). Identifying Corydoradinae Catfish Supplement 1. Ian Fuller Enterprises.
www.corydorasworld.com