Towards a Monophyletic Infrageneric Circumscription of Adesmia DC. (Dalbergieae, Leguminosae): a Taxonomic Revision in Adesmia series Adesmia

Autor(es)

Monteiro, Thiago Cobra E. ; Iganci, Joao Ricardo Vieira ; Miotto, Silvia Teresinha Sfoggia ; Simpson, Beryl B. ; Vatanparast, Mohammad ; Lewis, Gwilym P. ; Klitgard, Bente B. ; Pezzini, Flavia Fonseca ; Vargas, Oscar M. ; Fortuna-Perez, Ana Paula

• Tipo de documento: Artigo Científico
• Fonte: PHYTOTAXA; v. 639, n. 1, p. 69-pg., 2024-03-06.

Resumo

The Adesmia clade comprises five genera, with Adesmia being the most diverse, and formerly containing 206 species and 37 varieties, distributed in two subgenera and 43 series. The genus inhabits almost exclusively the Western South American Dry Diagonal (wSADD), which hosts some of the driest environments on Earth. Within Adesmia subgenus Adesmia, three series primarily inhabit the Pampa grasslands: the typical series Adesmia (previously referred as A. ser. Muricatae Burkart), Bicolores, and Subnudae. These taxonomically complex series display overlapping morphological characters and geographical distribution ranges, and their monophyly has never been tested. We carried out a thorough systematic study of the three series, combining Maximum Likelihood and Bayesian analyses of 87 sequences of nrITS DNA of 36 Adesmia species. Based on our phylogenetic results, we provide a taxonomic revision of the taxa in series Adesmia (= Muricatae), Bicolores, and Subnudae. Series Subnudae and Bicolores are nested within series Adesmia, and synonymization of the first two under series Adesmia is here proposed. Three clades containing species with geographical and morphological coherence were unraveled within Adesmia genus. Three varieties are elevated to species level, and eight taxa were synonymized. Seven lectotypes and one neotype are proposed. We recognize 21 species in the new circumscription of Adesmia series Adesmia, and provide a species identification key, descriptions, illustrations, and maps, as well as comments on phenology, taxonomy, etymology, distribution, and habitat. We also present conservation assessments for the species of the series. (AU)

• Processo FAPESP: 22/10636-9 - O Clado Adesmia (Leguminosae, Papilionoideae) como modelo para entender evolução das diagonais secas da América do Sul
• Beneficiário: Ana Paula Fortuna Perez
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/13386-0 - Estudos taxonômicos, filogenéticos e biogeográficos no gênero Eriosema (DC.) Desv. (Leguminosae, Papilionoideae, Phaseoleae)
• Beneficiário: Ana Paula Fortuna Perez
• Modalidade de apoio: Auxílio à Pesquisa - Regular