Bakerantha is one of the three genera of subfamily Hechtioideae (Bromeliaceae). This genus was re-established recently, and it currently contains four species (B. caerulea, B. lundelliorum, B. purpusii, and B. tillandsioides), which are distributed throughout the central region of Mexico. Bakerantha tillandsioides has the widest geographical distribution of the four species, and some populations currently referred to it do not match the species description. In this study, we used extensive sampling (81 accessions) of four plastid regions (matK, rpl32-trnL, rps16-trnK, and ycf1) and the nuclear PRK gene to reconstruct the phylogenetic relationships and delimit the species boundaries in Bakerantha. Our results confirm the monophyly of Bakerantha, and the species delimitation analysis supports five evolutionary lineages within Bakerantha, showing that B. tillandsioides is nonmonophyletic as currently circumscribed. Diagnostic characters and coherent geographical distributions support the five lineages. On the basis of our results, we describe and illustrate B. hidalguense as a new species and provide evidence that B. caerulea is morphologically and ecologically different from B. tillandsioides, with which it has been confused in the past. Additionally, we provide a morphological key to the Bakerantha species.

中文翻译：

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基于质体和核 DNA 的墨西哥属 Bakerantha (Hechtioideae, Bromeliaceae) 的系统发育关系：对分类学的意义

Bakerantha是 Hechtioideae (凤梨科) 的三个属之一。该属最近重新建立，目前包含四个物种（B. caerulea、B. lundelliorum、B. purpusii和B. tillandsioides），分布在墨西哥中部地区。Bakerantha tillandsioides是这四个物种中地理分布最广的，目前提到的一些种群与物种描述不符。在这项研究中，我们使用了四个质体区域（matK、rpl32 - trnL、rps16 - trnK和ycf1) 和 核PRK基因 重建 系统 发育 关系 并 划定Bakerantha的 物种 边界. 我们的结果证实了Bakerantha的单系性，物种划界分析支持Bakerantha内的五个进化谱系，表明B. tillandsioides是目前限定的非单系。诊断特征和连贯的地理分布支持这五个谱系。在我们的结果的基础上，我们将B. hidalguense描述和说明为一个新物种，并提供B. caerulea在形态和生态上与B. tillandsioides不同的证据, 过去一直与它混淆。此外，我们提供了Bakerantha物种的形态学关键。