Olivaichthys Explained

Olivaichthys is a genus of velvet catfishes endemic to Argentina.

Recently several authors have synonymized this genus with Diplomystes.^[1] A molecular analysis has proposed that trans-Andean Diplomystes and the cis-Andean Olivaichthys are so closely related (in addition to the close morphological similarity), that Olivaichthys should not be recognized. However, this is strange as recent divergence is unlikely with the species on either side of the Andes.^[2]

Species

• Olivaichthys cuyanus (Ringuelet, 1965)
• Olivaichthys mesembrinus (Ringuelet, 1982)
• Olivaichthys viedmensis (MacDonagh, 1931) (Otuno)

Notes and References

1. First description of small juveniles of the primitive catfish Diplomystes (Siluriformes: Diplomystidae). John G.. Lundberg. Berra, Tim M.. Friel, John P.. Ichthyological Exploration of Freshwaters. 15. 1. 71–82. March 2004. dead. https://web.archive.org/web/20090326130159/http://www.mansfield.ohio-state.edu/~tberra/pdf-files/Diplomystes.pdf. 2009-03-26.
2. . 2006. 41. 3. 636–62. A phylogenetic analysis of the major groups of catfishes (Teleostei: Siluriformes) using rag1 and rag2 nuclear gene sequences. Sullivan. JP. Lundberg JG . Hardman M . 10.1016/j.ympev.2006.05.044. 16876440. 2006MolPE..41..636S .