Phylogenetics and taxonomy of Habenaria sect. Micranthae (Orchidaceae), with the description of an overlooked new species from the Espinhaco mountain range, Eastern Brazil

被引:5
作者
Cruz-Lustre, Gabriela [1 ]
Castro, Cristian [2 ]
Borba, Eduardo Leite [1 ]
Nogueira Batista, Joao Aguiar [1 ]
机构
[1] Univ Fed Minas Gerais, Inst Ciencias Biol, Dept Bot, Ave Antonio Carlos 6627,Caixa Postal 486, BR-31270910 Belo Horizonte, MG, Brazil
[2] Univ Nacl Colombia, Inst Ciencias Nat, Bogota, Colombia
关键词
Habenariinae; Neotropics; nomenclature; Orchidoideae; sectional classification; South America; systematics; MOLECULAR PHYLOGENETICS; SYNOPSIS; NUCLEAR;
D O I
10.1080/14772000.2022.2030424
中图分类号
X176 [生物多样性保护];
学科分类号
090705 ;
摘要
Habenaria sect. Micranthae is one of the 14 Neotropical sections of the genus and in its current delimitation, comprises 14 morphologically heterogeneous species. Previous phylogenetic analyses have shown that the section is polyphyletic, so that both the species composition and the morphological characterization of the section are undefined. Furthermore, among the species associated with the section, H. bahiensis has a long history of obscure taxonomic identity and H. gollmeri of undefined phylogenetic relationships. To revise the taxonomic and morphological circumscription of H. sect. Micranthae and clarify the identity of H. bahiensis and phylogenetic relationships of both these species, we collected fresh samples to generate new sequences of DNA markers (ETS, ITS, matK-trnK, and rps16-trnK), performed Bayesian and parsimony analyses, and reassessed morphological features. Based on our analyses, H. sect. Micranthae is re-circumscribed to include eight phylogenetically and morphologically related species, characterized by their sulcate viscidia. Our results indicate that H. gollmeri belongs to H. sect. Micranthae and to the H. parviflora clade. Because none of the samples collected or examined exactly matched the original description of H. bahiensis, the identity of this species remains elusive. Specimens from the Espinhaco mountain range, previously identified as H. bahiensis, represent a new species described here as H. abscondita. In addition, we lectotypified H. maderoi and H. moritzii and proposed the synonymization of this last species with H. armata.
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页码:1 / 20
页数:20
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