Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

Micromyzon akamai, Gen. et Sp. Nov., a Small and Eyeless Banjo Catfish (Siluriformes: Aspredinidae) from the River Channels of the Lower Amazon Basin

John P. Friel and John G. Lundberg
Copeia
Vol. 1996, No. 3 (Aug. 1, 1996), pp. 641-648
DOI: 10.2307/1447528
Stable URL: http://www.jstor.org/stable/1447528
Page Count: 8
  • Read Online (Free)
  • Download ($12.00)
  • Subscribe ($19.50)
  • Cite this Item
Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Preview not available

Abstract

A new genus and species of aspredinid catfish, Micromyzon akamai, is described from trawl collections made in river channels of the Brazilian Amazon. This taxon is uniquely diagnosed by several apomorphies including lack of eyes, reduced melanic pigmentation, extremely reduced premaxillae and hypertrophied development of skull roofing elements and body armor. Its sister-group relationship to a clade containing Dupouyichthys and Ernstichthys is supported by the lack of lower jaw dentition, well-developed dorsal armor plates, and an anterior shift in the origin of the anal fin. /// Micromyzon akamai, novo gênero e nova espécie de Aspredinidae, é descrito procedente de coletas de arrasto de fundo nas calhas dos rios da Amazônia brasileira. Este taxon é diagnosticado por várias apomorfias exclusivas, incluindo a ausência de olhos, redução da pigmentação melânica, extrema redução dos prémaxilares e desenvolvimento hipertrofiado dos elementos da base do crânio e da armadura óssea. Possui como grupo mais próximo o clado contendo Dupouyichthys e Ernstichthys, com o qual compartilha a ausência de dentição da mandíbula inferior, placas ósseas dorsais muito desenvolvidas e o deslocamento da origem da nadadeira anal para uma posição mais anterior.

Page Thumbnails

  • Thumbnail: Page 
[641]
    [641]
  • Thumbnail: Page 
642
    642
  • Thumbnail: Page 
643
    643
  • Thumbnail: Page 
644
    644
  • Thumbnail: Page 
645
    645
  • Thumbnail: Page 
646
    646
  • Thumbnail: Page 
647
    647
  • Thumbnail: Page 
648
    648