Journal Article
Ammoglanis natgeorum, a new miniature pencil catfish (Siluriformes: Trichomycteridae) from the lower Atabapo River, Amazonas, Venezuela
Henschel, E., Lujan, N.K. and Baskin, J.N.
Record Number:
5429
Year:
2020
Journal:
Journal of Fish Biology
Pages:
1481-1490
Volume:
97
Abstract:
A new species of the sand-dwelling catfish genus Ammoglanis is described from a
marginal habitat of the lower Atabapo River, a left-bank blackwater tributary of the
upper Orinoco River in Amazonas, Venezuela, adjacent to the border with Colombia.
Ammoglanis natgeorum is distinguished from all congeners by trunk pigmentation pattern
consisting of scattered ventral chromatophores concentrated around the analfin
base and numerous additional meristic and anatomical characteristics.
A. natgeorum is the second species of Ammoglanis described from the Orinoco River
basin after Ammoglanis pulex, and several shared character states (e.g., eight total
dorsal-fin rays, overall coloration pattern and presence of two finger-like papillae
posterior to chin) suggest that it is more closely related to Ammoglanis obliquus (from
the central Amazon basin) and A. pulex than to other congeners.
KEYWORDS
blackwater, Orinoco basin, psammophily, riverine infauna, Sarcoglanidinae, taxonomy
Times Cited:
6
Relevent Species:
Ammoglanis natgeorum Henschel, Lujan and Baskin 2020Ammoglanis amapaensis Mattos, Costa and Gama 2008Ammoglanis diaphanus Costa 1994Ammoglanis pulex de Pinna and Winemiller 2000Ammoglanis multidentatus Costa, Mattos and Santos 2019Ammoglanis obliquus Henschel, Bragança, Rangel-Pereira and Costa 2020