Under Construction

Xyliphius Eigenmann

John P. Friel
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Containing group: Aspredinidae


Although this genus is not well represented in most museum collections, it appears to be widespread in the Magdalena, Orinoco, Amazon and Paraguay-Parana systems. This is certainly due to the fact that these fishes are most common in deeper waters and most specimens have been collected in bottom trawls.



A genus of moderately sized banjo catfishes (up to mm 147 mm SL) distinguished from all other aspredinids by the following characters: eyes highly reduced; premaxillae toothless and displaced lateral to mesethmoid; row of fleshy papillae projecting anteriorly off lower lip as shown below; unculi and unculiferous tubercles flattened; lamina of pterotic are rounded; and lateral end of posterohyal expanded, Other characters not unique to this taxon but useful for identification include: openings of anterior nares with papillae; coronomeckelian absent, Meckel's cartilage with high ascending process; premaxillae edentulous; pre-axial serrations absent.

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de Armburu, A. A., & Armburu, R. H. 1962. Una nueva especies de Xyliphius de la Argentina (Siluriformes, Bunocephalidae). Physis, XXIII(65): 219-222.

Eigenmann, C. H. 1912a. Some results from an ichthyological reconnaissance of Colombia, South America. Indiana University Studies, 16: 1-27.

Friel, J. 1994. A phylogenetic study of the Neotropical banjo catfishes (Teleostei: Siluriformes: Aspredinidae) Ph.D.thesis, Duke University, Durham, NC, 256 pp.

Orces, G. 1961. Hallazgo de peces de los géneros Xiliphius y Hoplomyzon en el sistema del Amazonas. Descriptión de una nueva especie. Ciencia y Naturaleza, 4(1): 3-6. Orces, G. 1962. Dos nuevos peces del género Xyliphius. Ciencia y Naturaleza, V(2): 50-54.

Risso, F. J., & de Risso. E. N. P. 1964. Hallazgo de una nueva especie de Xyliphius en el Parana (Pisces - Aspredinidae). Not. Mus. Cienc. Nat. Chaco, 1(2): 11-16.

Taphorn, D., & Lilystrom, C. 1983. Un nuevo pez del genero Xiliphius (Aspredinidae) de Venezuela. Rev. UNELLEZ Cienc. Tecn., 1(1): 43-46.

Title Illustrations
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Scientific Name Xyliphius kryptos
Image Use creative commons This media file is licensed under the Creative Commons Attribution-NonCommercial License - Version 3.0.
Copyright © 1995 John P. Friel
About This Page

John P. Friel
Cornell University Museum of Vertebrates, Ithaca, New York, USA

Page: Tree of Life Xyliphius Eigenmann. Authored by John P. Friel. The TEXT of this page is licensed under the Creative Commons Attribution License - Version 3.0. Note that images and other media featured on this page are each governed by their own license, and they may or may not be available for reuse. Click on an image or a media link to access the media data window, which provides the relevant licensing information. For the general terms and conditions of ToL material reuse and redistribution, please see the Tree of Life Copyright Policies.

Citing this page:

Friel, John P. 2000. Xyliphius Eigenmann. Version 14 April 2000 (under construction). http://tolweb.org/Xyliphius/15268/2000.04.14 in The Tree of Life Web Project, http://tolweb.org/

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