SCOTCAT.COM  

Hans-Georg Evers (1) Rich Hoyer (1) Zierfisch Zentrum Austria (2)

Similar to Hoplisoma xinguense but coming from a different location. Habitat: Most inhabit lotic environment in the rio Arinos and its tributaries. The Rio Arinos is characterised by a muddy-brown colour and a soft bottom of clay and sand. Collected mostly in small forest streams of black or clear water, or in marginal ponds. Description: Dorsal spines (total): 2; Dorsal soft rays (total): 8; Anal soft rays: 8. Corydoras (Hoplisoma) apiaka can be diagnosed from its spotted congeners by having smaller dorsal-fin spine than the three anterior branched dorsal-fin rays (vs. dorsal-fin spine smaller than just two anterior dorsal-fin rays, or equal in size). It differs from its congeners, with the exception of C. albolineatus, (now Hoplisoma albolineatum) C. araguaiaensis, (now Hoplisoma araguaiaense) C. haraldschultzi, (now Brochis haraldshultzi) C. julii, (now Hoplisoma julii) C. polystictus, (now Hoplisoma polystictum) C. multimaculatus (now Hoplisoma multimaculatum) and C. xinguensis, (now Hoplisoma ximguense) by having numerous dark-brown spots over the head and body (vs. absence of spots). It can be distinguished from C. albolineatus, C. araguaiaensis and C. haraldschultzi by having several spots scattered all over the head and trunk in a somewhat random pattern (vs. spots more concentrated and with a single pale horizontal stripe in the middle of the body in C. albolineatus; or spots arranged in three or more stripes along the trunk in C. araguaiaensis and C. haraldschultzi); pectoral, pelvic and anal fins hyaline (vs. several series of small blotches over fin rays), and adipose fin hyaline or bearing one spot (vs. two or more spots). Corydoras apiaka further differs from C. multimaculatus and C. xinguensis by the absence of blotches on interradial membrane of dorsal fin (vs. presence); adipose fin hyaline or with a single spot (vs. two or three well defined spots); spots not reaching over the anal fin base (vs. spots extending to anal-fin base). It is distinguished from C. xinguensis by the absence of spots onanal fin (vs. presence); body spots with diffuse border (vs. spots with well delimited edge). It can be further separated from all other spotted species, except C. multimaculatus, by the naked ventral region (vs. belly with small platelets). 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 apiaka has now been placed in Lineage 9 and has the new genus name of Hoplisoma. Aquarium Care: Will do well in a community setup with smaller tank mates such as Rasboras and Tetra's. Do not house with aggressive species or large Cichlids. Diet: Adults can be fed the usual good quality flake food, frozen bloodworm, tablet foods, white and grindal worms. Etymology: Named for the indigenous tribe Apiaká, meaning 'people' in Tupi language, which originally occupied the middle and lower rio Arinos, lower Rio Juruena, but is nowadays restricted to the lower Rio Juruena. The tribe is known for facial tattoos and bravery in battles, as well as by anthropophagic rites after fights. A noun in apposition. Remarks: This species is still found on some online sources as Corydoras apiaka.

None

Corydoras apiaka

Callichthyidae

South America: Tributaries of Rio Arinos, Rio Teles Pires and Rio Preto of the Rio Tapajós basin in Brazil. Type locality: Brazil. Mato Grosso, Ribeirão Oito de Julho, a tributary of the right margin of Rio Arinos, Rio Tapajós Basin, at road MT‑338 between Tapurah- Nova Paraná, Porto dos Gaúchos, 11°41’44”S, 57°06’42”W.

4.0cm (1½ins)

23-26°C (73-79°F)

6.5-7.2.

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.
Espíndola, V.C., M.R.S. Spencer, L.R. Rocha and M.R. Britto, 2014. A new species of Corydoras Lacépède (Siluriformes: Callichthyidae) from the Rio Tapajós basin and its phylogenetic implications. Papéis Avulsos de Zoologia 54(3):25-32.
Froese, R. and D. Pauly. Editors. 2021. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 08/2021 ).
www.corydorasworld.com
www.iNaturalist.org