Systematics of Brucepattersonius Hershkovitz, 1998 (Rodentia, Sigmodontinae): molecular species delimitation and morphological analyses suggest an overestimation in species diversity

Autor(es)

Abreu, Edson Fiedler ^[1] ; Jung, Diego Marques Henriques ^[2] ; Christoff, Alexandre Uarth ^[2] ; Valiati, Victor Hugo ^[2] ; Jansa, Sharon A. ^{[3, 4]} ; Percequillo, Alexandre Reis ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Lab Mamiferos, Dept Ciencias Biol, Escola Super Agr Luiz de Queiroz, BR-13418900 Piracicaba, SP - Brazil

^[2] Univ Vale Rio dos Sinos, Lab Genet & Biol Mol, BR-93022750 Sao Leopoldo, RS - Brazil

^[3] Univ Minnesota, Bell Museum Nat Hist, St Paul, MN 55108 - USA

^[4] Univ Minnesota, Dept Ecol Evolut & Behav, St Paul, MN 55108 - USA

• Tipo de documento: Artigo Científico
• Fonte: SYSTEMATICS AND BIODIVERSITY; v. 19, n. 6, p. 544-570, AUG 18 2021.
• Citações Web of Science: 0

Resumo

The genus Brucepattersonius currently includes eight valid species from the Atlantic Forest of south-eastern Brazil and north-eastern Argentina. Most of those species were described in the past 20 years, based on very small sample sizes: four species are known only from their type localities. Concerns on the taxonomic validity of some Brucepattersonius species have been raised in the recent literature. In this study, we present a phylogenetic hypothesis including samples throughout the distribution of the genus (among them the holotypes of two species) and employed single-locus molecular species delimitation analyses to provide a new hypothesis for species limits within Brucepattersonius. We also analysed intra- and interpopulation morphological and morphometric variation to apply an integrative taxonomic approach to species delimitation. Our phylogenetic inference of molecular data recovered four strongly supported clades within Brucepattersonius, which were recognized as distinct operational taxonomic units in all species delimitation analyses. The first two clades represent the Caparao mountain range endemic B. griserufescens and its sister-group, the recently described species B. nebulosus. The third clade comprises several specimens assigned to B. soricinus but also includes the holotype of B. igniventris; we revise these species limits accordingly. The last clade is composed of samples from southern Brazil assigned to B. iheringi. Based on morphological and morphometric analyses, we find no clear structure among the three described species from Misiones Province, Argentina (B. guarani, B. misionensis and B. paradisus) and B. inheringi from southern Brazil, suggesting that those samples represent a single species. Therefore, in the present study we propose that the genus Brucepattersonius comprises only four diagnosable species: B. griserufescens (including B. albinasus), B. nebulosus, B. soricinus (including B. igniventris) and B. iheringi (including B. guarani, B. misionensis and B. paradisus). (AU)

• Processo FAPESP: 10/14633-7 - Pequenos mamíferos não-voadores da Estação Ecológica de Bananal: diversidade e história natural
• Beneficiário: Edson Fiedler de Abreu Júnior
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 12/15928-6 - Pequenos mamíferos não voadores da Estação Ecológica de Bananal: análises moleculares
• Beneficiário: Edson Fiedler de Abreu Júnior
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Mestrado
• Processo FAPESP: 09/16009-1 - Sistemática, evolução e diversificação da subfamília Sigmodontinae na América do Sul: a tribo Oryzomyini
• Beneficiário: Alexandre Reis Percequillo
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 16/20055-2 - Sistemática e biogeografia da Tribo Oryzomyini (Cricetidae: Sigmodontinae) na América do Sul
• Beneficiário: Alexandre Reis Percequillo
• Modalidade de apoio: Bolsas no Exterior - Pesquisa