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Felipe Alonso (3)

Description: Corydoras gladysae (now Urkumaysae gladysae) is distinguished from other species of the genus by the caudal-fin shape, slightly emarginated and by presenting the shortest dorsal and pectoral spines length (mean = 9.2 % and 14.8 % of SL, respectively). This Corydoras (Urkumaysae) species is similar looking to the Aspidoras genus and in the future may be moved into this genera. Habitat: Currently, the species is only known from Calchaquí river, in the sub-Andean range system, at Cachi and Payogasta localities, in Cachi Department, Salta, Argentina. This river is a tributary to the superior river basin of the Juramento river, that ends in Paraná river. Lineage: Placed in Lineage 6 which has always been classified as Corydoras (Lacépède, 1803) so a new genus would need to be described and a new type species when a revision is carried out. As of the latest revision (Dias et al 2024), Corydoras gladysae has now been placed in Lineage 9 and has the new genus name of Hoplisoma. Update: As of the latest revision (Alfonso et al. 2024) Hoplisoma petracinii has still been placed in Lineage 9 but has the new genus name of Urkumayu. 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 genus name Urkumayu: Comes from the Quechua, combining urku (mountain) and mayu (river), referring to the habitat of this species. They are all endemic to the Andean portion of the northwest of the La Plata basin, Argentina. The specific epithet refers to and is dedicated to its original collector Gladys Ana María Monasterio de Gonzo. Remarks: Coming from the southern parts of South America this species prefers the water temperature to be more on the cooler side. This species is still found on some online sources as Corydoras gladysae or Hoplisoma gladysae.

None

Corydoras gladysae, Hoplisoma gladysae

Callichthyidae

South America: Calchaquí river, Payogasta, Cachi Department, Salta province, Argentina. Type Locality: Calchaquí River, 25°02'59"S, 66°06'25" W, Payogasta, Cachi Department, Salta Province, Argentina, elevation 2430 meters.

3.5cm (1½ins)

20-25°C (67-77°F)

6.5-7.5.

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.
Calviño, P.A. and F. Alonso, 2010. Two new species of the genus Corydoras (Ostariophysi: Siluriformes: Callichthyidae) from northwestern Argentina, and redescription of C. micracanthus Regan, 1912. Revista del Museo Argentino de Ciencias Naturales, n. s. 11(2): 199-214.
Felipe Alonso, Guillermo Enrique Terán, Gastón Aguilera, Martin Miguel Montes, Wilson Sebastián Serra Alanís, Pablo Calviño, Héctor Samuel Vera-Alcaraz, Yamila Cardoso, Stefan Koerber, Juan Marcos Mirande. Integrative phylogeny of Corydoradinae (Siluriformes: Callichthyidae) with an emphasis on Northwestern La Plata species, including descriptions of a new genus and species, Zoologischer Anzeiger, 2024, ISSN 0044-5231, DOI:
Froese, R. and D. Pauly. Editors. 2019. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 08/2019 ).
www.corydorasworld.com