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      Kalunga in the lusophone context: A phylogenetic study

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          Abstract

          Kalunga is a variety of Afro-Portuguese spoken in a rural community located in the state of Goiás, Brazil. In this study, we compare Kalunga with other varieties of Portuguese spoken in Angola, Brazil, Cape Verde, and Portugal and Portuguese-based creoles from a contact linguistics perspective. We investigate typological similarities, differences, and possible connections between these varieties. The results support previous sociohistorical and linguistic studies that reveal significant differences between Kalunga and standardized varieties of Portuguese, and the typological distinction between creoles, more vernacular varieties, and more standard varieties.

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          Most cited references60

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          Application of phylogenetic networks in evolutionary studies.

          The evolutionary history of a set of taxa is usually represented by a phylogenetic tree, and this model has greatly facilitated the discussion and testing of hypotheses. However, it is well known that more complex evolutionary scenarios are poorly described by such models. Further, even when evolution proceeds in a tree-like manner, analysis of the data may not be best served by using methods that enforce a tree structure but rather by a richer visualization of the data to evaluate its properties, at least as an essential first step. Thus, phylogenetic networks should be employed when reticulate events such as hybridization, horizontal gene transfer, recombination, or gene duplication and loss are believed to be involved, and, even in the absence of such events, phylogenetic networks have a useful role to play. This article reviews the terminology used for phylogenetic networks and covers both split networks and reticulate networks, how they are defined, and how they can be interpreted. Additionally, the article outlines the beginnings of a comprehensive statistical framework for applying split network methods. We show how split networks can represent confidence sets of trees and introduce a conservative statistical test for whether the conflicting signal in a network is treelike. Finally, this article describes a new program, SplitsTree4, an interactive and comprehensive tool for inferring different types of phylogenetic networks from sequences, distances, and trees.
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            Phylogenies and the Comparative Method

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              Language phylogenies reveal expansion pulses and pauses in Pacific settlement.

              Debates about human prehistory often center on the role that population expansions play in shaping biological and cultural diversity. Hypotheses on the origin of the Austronesian settlers of the Pacific are divided between a recent "pulse-pause" expansion from Taiwan and an older "slow-boat" diffusion from Wallacea. We used lexical data and Bayesian phylogenetic methods to construct a phylogeny of 400 languages. In agreement with the pulse-pause scenario, the language trees place the Austronesian origin in Taiwan approximately 5230 years ago and reveal a series of settlement pauses and expansion pulses linked to technological and social innovations. These results are robust to assumptions about the rooting and calibration of the trees and demonstrate the combined power of linguistic scholarship, database technologies, and computational phylogenetic methods for resolving questions about human prehistory.
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                Author and article information

                Contributors
                Journal
                2397-5563
                Journal of Portuguese Linguistics
                Ubiquity Press
                2397-5563
                23 March 2020
                2020
                : 19
                : 2
                Affiliations
                [1 ]Aarhus University, DK
                [2 ]Universidade de São Paulo, Conselho Nacional de Desenvolvimento Científico e Tecnológico – CNPq (Bolsista de Produtividade de Pesquisa), BR
                Article
                10.5334/jpl.224
                3bfd5d3b-4230-4a6a-8840-28e55985548c
                Copyright: © 2020 The Author(s)

                This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. See http://creativecommons.org/licenses/by/4.0/.

                History
                : 01 May 2019
                : 21 December 2019
                Categories
                Research paper

                Linguistics & Semiotics,Languages of Europe
                Portuguese-speaking world,Afro-Portuguese,creole languages,typology,phylogenetics,Kalunga

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