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Magdalenichthys yariguies DoNascimiento, Villa-Navarro, Ortega-Lara, Albornoz-Garzón, Méndez-López & Conde-Saldaña, 2025 |
Image contributors to this species: |
DoNascimiento et al. 2025 (3) Colombia, |
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Other Sources: |
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Relevant Information: |
Magdalenichthys yariguies is a newly described species of catfish belonging to the genus Magdalenichthys, which is endemic to the Magdalena River basin in Colombia. It was discovered along with three other new Magdalenichthys species: M. lundbergi, M. mompox, and M. poira. The new genus Magdalenichthys is characterised by a unique feature: a pointed posterior process on the posterolateral corner of the lateral ethmoid bone. This process extends parallel to the lateral margin of the neurocranium and contacts the lateral margin of the frontal bone. This distinguishes it from other heptapterids, except Phenacorhamdia, which also has a prognathous mouth (mouth extending forward). Magdalenichthys differs from Phenacorhamdia in having a longer upper caudal-fin lobe and simple hemal spines of vertebrae dorsal to the anal fin. Habitat: This species is restricted to the La Colorada River drainage, a direct tributary of the middle section of the Magdalena River basin. Etymology: The genus name Magdalenichthys: In allusion to the Magdalena River basin, remarking on the restricted geographic distribution of this heptapterid genus to the Cauca and Magdalena rivers, which together form the main hydrographic basin of the trans-Andean region of Colombia, framed by the Western, Central, and Eastern cordilleras, the most salient feature of the Colombian geomorphology. Gender masculine. The specific name yariguies: The name yariguies honours the exterminated indigenous group that inhabited the Río Cascajales drainage. Used as a noun in apposition. (DoNascimiento et al. 2025). |
Common Name: |
None |
Synonyms: |
None |
Family: |
Heptapteridae |
Distribution: |
South America: Colombia, Magdalena River basin. Type locality: Colombia, Tolima, Chaparral, Río Guanábanos, tributary of Río Saldaña, 03°31’08”N 75°31’50”W. |
Size: |
5.0cm. (2ins) |
Temp: |
23-25°C (73-77°F) |
p.H. |
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6.0-7.2. |
Reference: |
Carlos DoNascimiento, Francisco Antonio Villa-Navarro, Juan G Albornoz-Garzón, Cristhian C Conde-Saldaña, Gabriel S C Silva, Alejandro Méndez-López, Fábio F Roxo, Armando Ortega-Lara, Claudio Oliveira, An unexpectedly diverse new genus of catfishes (Siluriformes, Heptapteridae) endemic to the Magdalena River basin, Colombia, Zoological Journal of the Linnean Society, Volume 204, Issue 3, July 2025, zlaf048. |
Family: Heptapteridae Back to Ident-A-Cat Click on Thumbnails |
 Magdalenichthys
yariguiesHolotype-Colombia, Santander, El Carmen de Chucurí, quebrada La Concordia, Río La Colorada drainage |
 Magdalenichthys
yariguiesDorsal view-holotype-Colombia, Santander, El Carmen de Chucurí, quebrada La Concordia, Río La Colorada drainage |
 Magdalenichthys
yariguiesVentral view-holotype-Colombia, Santander, El Carmen de Chucurí, quebrada La Concordia, Río La Colorada drainage |
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