SCOTCAT.COM  

Rob McLure (1) 3Punkt11 Aquaristik (3) G.M Aquatics (1)

CW173 has now been described by (Tencatt et al.) in 2022. Found in the same waters as Hoplisoma thanatos (CW146), (previously Corydoras thanatos). Colouration: Similar to the colour pattern of preserved specimens, but with light ground colour of body and slightly more evident stripe from anteroventral portion of eye to upper lip lateral area. Body covered by greenish yellow iridescent colouration. Aquarium specimens were observed to present dorsal and lateral surface of head plus lateral surface of cleithrum with irregular, rounded or vermiculated, conspicuous dark brown or black blotches, and conspicuous blotches on body. Some specimens with ground colour of body greyish yellow. 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 Hoplisoma (Agassiz, 1846). As of the latest revision (Dias et al 2024) Corydoras hypnos has now been placed in Lineage 9 and has the new genus name of Hoplisoma. 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. Etymology: The specific epithet “hypnos” refers to Hypnos (from the Greek ?p???, Ýpnos, which means “sleep”), the Greek god or personification of sleep, and the twin brother of Thanatos, the god/personification of death. The name makes an allusion to the fact that even though both H. hypnos and H. thanatos may present some similarities (in colour pattern), they are completely different in other aspects (general morphological pattern). A noun in apposition. Remarks: This species is still found on some online sources as Corydoras hypnos.

CW173

Corydoras hypnos

Callichthyidae

South America: Known from the Rio Jamanxim and one of its tributaries, with unknown name, Rio Tapajós basin, Novo Progresso Municipality, Pará State, Brazil

Male: 4.5cm (1¾ins) Female: 5.5cm (2¼ins)

22-27°C (71-81°F)

6.0-7.2.

Alexandrou, Markos & Taylor, Martin. (2011). Evolution, ecology and taxonomy of the Corydoradinae revisited.
Angelica C Dias, Luiz F C Tencatt, Fabio F Roxo, Gabriel de Souza da Costa Silva, Sérgio A Santos, Marcelo R Britto, Martin I Taylor, Claudio Oliveira, Phylogenomic analyses in the complex Neotropical subfamily Corydoradinae (Siluriformes: Callichthyidae) with a new classification based on morphological and molecular data, Zoological Journal of the Linnean Society, 2024;, zlae053.
Tencatt LFC, Ohara WM, Sousa LM, Britto MR. Science and hobby joining forces for the discovery of three new Corydoras (Siluriformes: Callichthyidae) from the rio Tapajós basin, Brazil, with comments on Corydoras sp. CW111. Neotrop Ichthyol. 2022.
www.corydorasworld.com