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Arratia G, Quezada-Romegialli C. 2017 (1) Muñoz-Ramírez CP et.al. (4) Pablo Reyes Lobao-Tello (1)

Description: Body without scales and elongated, smooth skin with short papillae. The size of the eye is small. It has a pair of maxillary barbels, the nasal openings are surrounded by a fold of posterior skin. Vomerian teeth short, wide and conical. The second dorsal fin is adipose and is inserted at the end of the base of the anal fin. The first dorsal and the pectorals contain an ossified radius, pointed at its distal end and with dentate posterior margin. The pectoral fin also has a spine, the pelvic fins are in an abdominal position and the caudal atheta is slightly furcated, with two well-marked lobes. Colouration: The colour it presents is on the back of the head and dark trunk, violet or blackish, flanks and orange ventral part. (Arratia, 1987). Habitat: D. nahuelbutaensis is an endemic species of Chile, with reduced abundance. Background on their biology indicate that there is a separation between juveniles and adults in terms of habitat, because adults live in more torrential and deep waters, while juveniles are associated with preferably less torrential riparian areas, have also been described in environments of ritron, mainly in areas of deep pools with benthos, substrates of gravel to boulders with low temperatures and high oxygenation (Habit, 1994). Remarks: The present study, therefore, represent the rediscovery of diplomystids from coastal basins after a century (since 1919) and first records in the Laraquete and Carampangue basins (Muñoz-Ramírez CP. et.al. 2020).

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Diplomystidae

South America: Bío-Bío River basin and Loncomilla River in Chile.

20.0cm (8ins)

20-24°C (67-75°f.)

6.0-7.0.

Arratia G, Quezada-Romegialli C. (2017) Understanding morphological variability in a taxonomic context in Chilean diplomystids (Teleostei: Siluriformes), including the description of a new species.
Froese, R. and D. Pauly. Editors. 2018. FishBase. World Wide Web electronic publication. www.fishbase.org, ( 06/2018 ).
de Pinna, M.C.C., 1998. Phylogenetic relationships of neotropical Siluriformes (Teleostei: Ostariophysi): historical overview and synthesis of hypotheses. p. 279-330. In L.R. Malabarba, R.E. Reis, R.P. Vari, Z.M.S. Lucena and C.A.S. Lucena (eds.) Phylogeny and classification of neotropical fishes. Porto Alegre: EDIPUCRS.
Muñoz-Ramírez CP, Briones R, Colin N, Fierro P, Górski K, Jara A, Manosalva A. A Century after! Rediscovery of the ancient catfish Diplomystes Bleeker 1858 (Siluriformes: Diplomystidae) in coastal river basins of Chile and its implications for conservation. Neotrop Ichthyol. 2020; 18(1):e190073.