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Acanthobunocephalus Friel 1995

Acanthobunocephalus nicoi Friel 1995

John P. Friel
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Containing group: Aspredinidae


Members of this genus become sexually mature at just over 16 mm standard length. They are known from only three localities and appear to berestricted to the upper Orinoco River system of Venezuela and possibly the upper Negro River system of Brazil.



A genus of miniature fishes (less than 20 mm SL) distinguished from other aspredinids by the following characters: presence of a dorsal spinelet and rigid dorsal-spine; anteriorly expanded supraoccipital; absence of a posterior cranial fontanel; posterior cartilage of palatine absent; 2 pectoral radials; horizontal bony lamina developed only on last three centra and compound ural centrum; and absence of procurrent caudal-fin rays. Other characters not unique to this taxon but useful for identification are: reduced ornamentation of skull roof, dorsal lamina of Weberian complex, and nuchal plates; jaws equal; pectoral fin with spine and 4 rays; dorsal fin with spine and 3 rays; dorsal- and anal-fin membranes not adnate with body; dorsal- and ventral-most principal caudal rays much shorter than others, infraorbital lateralis canal truncated; lateral line truncated at approximately the level of the dorsal fin origin.

Other Names for Acanthobunocephalus nicoi Friel 1995


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

Friel, J. 1995. Acanthobunocephalus nicoi, a new genus and species of miniature banjo-catfish from the upper Orinoco and Casiquiare Rivers, Venezuela. (Siluriformes: Aspredinidae). Ichthyological Explorations of Freshwaters, 6(1): 89-95.

Title Illustrations
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Scientific Name Acanthobunocephalus nicoi
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 Acanthobunocephalus Friel 1995. Acanthobunocephalus nicoi Friel 1995. 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. Acanthobunocephalus Friel 1995. Acanthobunocephalus nicoi Friel 1995. Version 14 April 2000 (under construction). http://tolweb.org/Acanthobunocephalus_nicoi/15254/2000.04.14 in The Tree of Life Web Project, http://tolweb.org/

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