If you need an accessible version of this item please contact JSTOR User Support

Eurycheilus pantherinus (Siluroidei: Loricariidae), a New Genus and Species of Hypoptopomatinae from Southern Brazil

Roberto E. Reis and Scott A. Schaefer
Copeia
Vol. 1992, No. 1 (Feb. 3, 1992), pp. 215-223
DOI: 10.2307/1446554
Stable URL: http://www.jstor.org/stable/1446554
Page Count: 9
  • Download PDF
  • Cite this Item

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 need an accessible version of this item please contact JSTOR User Support
Eurycheilus pantherinus (Siluroidei: Loricariidae), a New Genus and Species of Hypoptopomatinae from Southern Brazil
Preview not available

Abstract

A new genus and species of the loricariid subfamily Hypoptopomatinae, Eurycheilus pantherinus, is described from the upper Uruguay River system of southern Brazil. The new genus is distinguished from all other species of Hypoptopomatinae on the basis of the size and shape of the lower lip, presence of seven branched pectoral-fin rays, a broad head and body, and coloration. Characters autapomorphic for this species within the Loricariidae include the accessory ceratobranchial flange reduced to a small, uncinate process, and loss of the filamentous gill rakers on the oral surfaces of the hyobranchial skeleton. The phylogenetic relationships of the new genus apparently lie with members of the tribe Otothyrini, including Otothyris, Pseudotothyris, Pseudotocinclus, Parotocinclus, and Schizolecis. /// Um novo gênero e espécie de Loricariidae (subfamília Hypoptopomatinae), Eurycheilus pantherinus, é descrito do sistema do rio Uruguai superior, no sul do Brasil. O novo gênero se distingue dos demais Hypoptopomatinae pelo tamanho e forma do lábio inferior, presença de sete raios ramificados na nadadeira peitoral, cabeça e corpo muito largos e coloração. Caracteres autapomórficos para esta espécie incluem a redução da lâmina acessória do ceratobranquial para um pequeno precesso uncinado e a perda dos rastros branquiais filamentosos da face oral do esqueleto branquial. As relações filogenéticas do novo gênero aparentemente são com os membros da tribo Otothyrini, que inclui Otothyris, Pseudotothyris, Pseudotocinclus, Parotocinclus e Schizolecis.

Page Thumbnails

  • Thumbnail: Page 
[215]
    [215]
  • Thumbnail: Page 
216
    216
  • Thumbnail: Page 
217
    217
  • Thumbnail: Page 
218
    218
  • Thumbnail: Page 
219
    219
  • Thumbnail: Page 
220
    220
  • Thumbnail: Page 
221
    221
  • Thumbnail: Page 
222
    222
  • Thumbnail: Page 
223
    223