A New Small Barb (Cyprininae: Smiliogastrini) from the Louesse, Lekoumou (Upper Niari Basin), and Djoulou (Upper Ogowe Basin) Rivers in the Republic of Congo, West-Central Africa
Autoren:
Victor Mamonekene Ecole Nationale Supérieure d'Agronomie et de Foresterie, Brazzaville, Congo
Armel Ibala Zamba Marien Ngouabi University
Melanie L. J. Stiassny American Museum of Natural History
December 2018 American Museum Novitates 3917(3917):1-16 DOI:10.1206/3917.1
Abstrakt:
A new species of smiliogastrin cyprinid is described from the Louesse, Lekoumou (upper Niari basin), and Djoulou (upper Ogowe basin) rivers in the Republic of Congo, west-central Africa. The new species is readily distinguished from congeners by the presence of a flexible, weakly ossified and smooth bordered last unbranched dorsal-fin ray, well-developed barbels, and a straight and complete lateral line in combination with a characteristic pigmentation patterning consisting of a distinctive, rounded black spot at the base of and extending over the first rays of the anal fin and a prominent, darkly pigmented blotch over the base of the anterior dorsal-fin rays. A combination of morphological features and pigmentation patterning that appears to be unique among Enteromius. The new species is widespread throughout the Louesse-Djoulou region, and the fact that such a seemingly common species has gone undetected until now serves to underscore how poorly known this region of the Republic of Congo remains.
Enteromius walshae, new species: A, AMNH 266856, holotype (female) in preservation; B, individual from the same population in life. C, AMNH 266858, paratype (male) in preservation; D, individual from same population in life; E, digestive tract, after removal of liver and adherent tissues (approximately to scale).
PDF zum runterladen [[File:Mamonekeneetal2018 (1).pdf]]
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