2022
DOI: 10.1163/15685381-bja10114
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Morphological trends and genetic divergence in anacondas, genus Eunectes Wagler, 1830 (Serpentes: Boidae)

Abstract: The genus Eunectes Wagler, 1830 is divided into four nominal species: E. murinus (Linnaeus, 1758), E. notaeus Cope, 1862, E. deschauenseei Dunn and Conant, 1936, and E. beniensis Dirksen, 2002 (E. barbouri Dunn and Conant, 1936 being a synonym of E. murinus). We analyze multivariate morphological traits (scalation, coloration pattern, and body shape), sequences of one mitochondrial and five nuclear genes, and genetic patterns of randomly amplified DNA (RAPD) markers of historical geographical samples represent… Show more

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Cited by 2 publications
(8 citation statements)
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“…Therefore, our results challenge the validity of E. beniensis and E. deschauenseei as distinct species from E. notaeus. Consistent with a previous study [23], we recovered the Yellow Anacondas as paraphyletic, with E. beniensis and E. deschauenseei nested within E. notaeus (Figure 2) and with shallow levels of divergence between the clades (Table 3). Our sampled taxa included one from the Bolivian Beni that was both genetically and morphologically E. deschauenseei, despite being outside the known range of this species.…”
Section: Yellow Anaconda Phylogenetics and Taxonomysupporting
confidence: 90%
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“…Therefore, our results challenge the validity of E. beniensis and E. deschauenseei as distinct species from E. notaeus. Consistent with a previous study [23], we recovered the Yellow Anacondas as paraphyletic, with E. beniensis and E. deschauenseei nested within E. notaeus (Figure 2) and with shallow levels of divergence between the clades (Table 3). Our sampled taxa included one from the Bolivian Beni that was both genetically and morphologically E. deschauenseei, despite being outside the known range of this species.…”
Section: Yellow Anaconda Phylogenetics and Taxonomysupporting
confidence: 90%
“…Comparisons were made with museum specimens from Venezuela (Museo de Ciencias Naturales de Guanare: MCNG 1042, Museo de Biología Universidad Central de Venezuela: MBUCV 1836, MBUCV 7193, MBUCV 7189), Surinam (Naturalis Biodiversity Center; RMNH.RENA.20768), as well as Brazil (Museu Emilio Goeldi MPEG 27428), and information from the literature on animals from Venezuela [88], Guyana [89], Peru, Bolivia, and Brazil [23,24]. We collected the following meristic information: the number of dorsal scales at the mid-body, number of subcaudal scales, number of ventral scales, number of ocular scales (average of the number of scales around each eye), number of supralabial scales (average from both sides), number of infralabial scales (average from both sides), number of suborbitalia scales (scales simultaneously in contact with supralabials and infra-orbitals; often called lorilabials), number of dorsal blotches from the neck to the tail (excluding the head) in the back and sides (blotches in contact were counted as different blotches), and number of blotches in contact with other blotches.…”
Section: Morphological Comparison Of E Murinus Between North and Southmentioning
confidence: 99%
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