A new species of Tanaecium (Bignonieae, Bignoniaceae) from the Brazilian Amazon and its phylogenetic placement

Frazão, Annelise; Lohmann, Lúcia G.

doi:10.1007/s00606-018-1544-x

Original Article
Published: 05 October 2018

A new species of Tanaecium (Bignonieae, Bignoniaceae) from the Brazilian Amazon and its phylogenetic placement

Plant Systematics and Evolution volume 304, pages 1245–1253 (2018)Cite this article

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Abstract

Tanaecium (Bignonieae, Bignoniaceae) is a genus of Neotropical lianas that is centered in the Amazon. The genus exhibits interesting patterns of morphological variation, especially in terms of flower morphology. Despite that, the group remains poorly known, lacks a phylogeny and a taxonomic revision. While working on the systematics of Tanaecium, we encountered a morphological variant of Tanaecium pyramidatum from the Brazilian Amazon that represents an independent evolutionary lineage and differs from that species in various morphological traits. This taxon is here described as Tanaecium decorticans, sp. nov. While T. decorticans is sister and most morphologically similar to T. pyramidatum, it differs in the peeling epidermis (vs. not peeling in T. pyramidatum), presence of an arrow-shaped petiolule (vs. absence of an arrow-shaped petiolule in T. pyramidatum), and interpetiolar region covered with fields of glandular trichomes (vs. aglandular interpetiolar region in T. pyramidatum), among other characters. This finding highlights the importance of in-depth taxonomic studies of individual lineages for an improved understanding of the Amazonian biodiversity.

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Acknowledgements

The authors thank the curators of the INPA and SPF herbaria for allowing us to examine specimens. We also thank Augusto Giaretta, Jéssica Francisco, Leandro Giacomim, and Hélcio de Souza for assistance during fieldwork, André Carvalho for assistance with the preparation of the distribution map, Klei Sousa for illustrating T. decorticans, and Beatriz Gomes for comments on an earlier version of the manuscript.

Funding

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)—Finance Code 001, 1525151, Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq, 142224/2015-4, 310871/2017-4), Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP 2011/50859-2, 2012/50260-6, 2015/10914-5), International Association for Plant Taxonomy (IAPT 2016), Systematic Research Fund (SRF 2016), Society of the Systematic Biologists (SSB 2017).

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Departamento de Botânica, Instituto de Biociências, Universidade de São Paulo, São Paulo, 05580-090, Brazil
Annelise Frazão & Lúcia G. Lohmann

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Annelise Frazão
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Lúcia G. Lohmann
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Correspondence to Annelise Frazão or Lúcia G. Lohmann.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Handling editor: Mike Thiv.

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Frazão, A., Lohmann, L.G. A new species of Tanaecium (Bignonieae, Bignoniaceae) from the Brazilian Amazon and its phylogenetic placement. Plant Syst Evol 304, 1245–1253 (2018). https://doi.org/10.1007/s00606-018-1544-x

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Received: 28 May 2018
Accepted: 13 September 2018
Published: 05 October 2018
Issue Date: December 2018
DOI: https://doi.org/10.1007/s00606-018-1544-x

Keywords

Amazonia
Lianas
Neotropical biodiversity
Taxonomy