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Four New Hypancistrus (Siluriformes: Loricariidae) from Amazonas, Venezuela
 

Summary: Four New Hypancistrus (Siluriformes: Loricariidae) from
Amazonas, Venezuela
JONATHAN W. ARMBRUSTER, NATHAN K. LUJAN, AND D. C. TAPHORN
Hypancistrus contradens, H. debilittera, H. furunculus, and H. lunaorum are described
based on specimens from the upper RiŽo Orinoco of southern Venezuela. Hypancistrus
furunculus differs from other Hypancistrus based on color pattern: distinct dark oblique
stripes ending at posterior insertion of dorsal fin and vertical bands in caudal fin (vs.
oblique stripes ending at end of caudal fin in H. zebra and thin, indistinct, light-colored
bands and vermiculations on a dark background in H. debilittera) and color pattern dark
with white spots in H. contradens, H. inspector, and H. lunaorum. Hypancistrus contradens
and H. lunaorum differ from H. inspector by having the dorsal fin reaching the adipose
fin when adpressed (vs. not reaching), having spots on the head the same size as the
body or spots absent (vs. spots smaller on head) and by usually having 22­23 mid-
ventral plates (vs. 24); and from H. debilittera, H. furunculus, and H. zebra by lacking
bars, saddles, or stripes on the body and bands in the fins. Hypancistrus lunaorum differs
from H. contradens by having white spots on the body smaller than nasal aperture
diameter (vs. white spots larger than the nasal aperture diameter).
Se describen como especies nuevas a Hypancistrus contradens, H. debilittera, H.
furunculus, e H. lunaorum sobre la base de especiŽmenes provenientes de la cuenca alta del
riŽo Orinoco en el sur de Venezuela. Hypancistrus furunculus difiere de todas las demaŽs

  

Source: Armbruster, Jonathan W. - Department of Biological Sciences, Auburn University

 

Collections: Environmental Sciences and Ecology