Ammoglanis natgeorum , a new miniature pencil catfish ( S iluriformes: T richomycteridae) from the lower A tabapo R iver, A mazonas, V enezuela

Autor:	Jonathan N. Baskin, Nathan K. Lujan, Elisabeth Henschel
Rok vydání:	2020
Předmět:	geography geography.geographical_feature_category biology Drainage basin Zoology Aquatic Science biology.organism_classification Ammoglanis Sarcoglanidinae Pulex parasitic diseases Tributary Trichomycteridae Ecology Evolution Behavior and Systematics Meristics Catfish
Zdroj:	Journal of Fish Biology. 97:1481-1490
ISSN:	1095-8649 0022-1112
DOI:	10.1111/jfb.14515
Popis:	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 anal-fin 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.
Databáze:	OpenAIRE
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