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| Bujurquina omagua Říčan & Říčanová, 2023 |
ABSTRACT
Bujurquina is the most widely distributed and species-rich genus of cichlids in the western Amazon of South America. In this study we describe a new species from Peru from a hypothesized reverse flowing river system. Prior to the origin of the modern Amazon River at 4.5 Ma, this river system had its headwaters on the Iquitos arch, one of several main structural arches (swells) in the Amazon. Prior to the origin of the modern Amazon these arches formed topographic barriers of drainage basins in lowland Amazonia. For our analyses we use morphological and molecular data, analyzed through multivariate statistics and molecular phylogenies, respectivelly. For all valid species in the genus (except B. cordemadi and B. pardus) we additionally for the first time provide photographs of live specimens. Based on DNA phylogeny and coloration patterns we demonstrate that Bujurquina is divided into two main clades and based on this we provide a dichotomous key for all the species.
Keywords: biogeography, endemism, freshwater fishes, new species, phylogeny
Class Actinopterygii Klein, 1885
Order Cichliformes R. Betancur-R et al. 2013
Family Cichlidae Bonaparte, 1835
Genus Bujurquina Kullander, 1986
Bujurquina omagua sp. nov.
Etymology: The specific epithet ‘omagua’ is a noun in apposition given after the Omagua people, which were at the time of first contact with Europeans in the 16th century the dominant people along the banks of the Amazon River upstream from the mouth of the Negro River well into Peru.
Oldřich Říčan and Štěpánka Říčanová. 2023. A New highly apomorphic Species of Bujurquina (Teleostei: Cichlidae) from A Reverse Flowing River in the Peruvian Amazon, with A Key to the Species in the Genus. European Journal of Taxonomy. 870(1); 167–201. DOI: 10.5852/ejt.2023.870.2127
