Species diversity and systematics of the Leptodactylus melanonotus group (Anura, Leptodactylidae): review of diagnostic traits and a new species from the Eastern Guiana Shield

IF 1.8 3区环境科学与生态学 Q2 BIODIVERSITY CONSERVATION

Systematics and Biodiversity Pub Date : 2022-07-22 DOI:10.1080/14772000.2022.2089269

T. R. Carvalho, Antoine Fouquet, Mariana L. Lyra, A. Giaretta, C. E. Costa-Campos, M. T. Rodrigues, C. Haddad, S. Ron

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引用次数: 4

Abstract

The Leptodactylus melanonotus species group is an anuran clade widely distributed in the Neotropics. This clade harbours many species that are difficult to identify because of incomplete taxonomic knowledge, ambiguous species boundaries and distribution. Here we expand the understanding of species diversity of this Leptodactylus clade by analysing mtDNA sequences for over 600 individuals, delimiting Operational Taxonomic Units (OTUs), and updating species identifications and distributions by linking sequences to morphotypes and calls. Also, we review the morphological and acoustic traits traditionally used as diagnostic characters of species within this group. The DNA-based species delimitation analyses yielded 57 OTUs. Given that only 19 taxa are currently recognized as valid species, our results suggest the existence of many unnamed species within the L. melanonotus group. After reassessing morphological traits in the group, we concluded that the combined use of dorsolateral fold, upper lip stripe, and belly colouration is sufficiently informative for species identification in most cases, especially when associated with data on geographic distribution and habitat use. Regarding advertisement calls, the patterns of amplitude and frequency modulation, calling rate, and dominant frequency were also informative for species discrimination. Furthermore, we designate a neotype for L. wagneri, for which we also describe the advertisement call, and make comparisons with congeners of the L. melanonotus group, especially with the partially sympatric L. leptodactyloides. Lastly, we name and describe a new species endemic to the Eastern Guiana Shield. Patterns of distribution and habitat use in the L. melanonotus group revealed that sympatric occurrences are more commonly found among distantly related species, whereas allopatric occurrences correspond to closely related ones. Speciation between closely related species of the group seems to be related to ecological divergence (open vs. forest habitats) in parallel with clear morphological and acoustic differentiation. http://www.zoobank.org/urn:lsid:zoobank.org:pub:867A8EA9-A8F2-4FA4-8746-A0D9BB2E4286

查看原文本刊更多论文

黑腹细齿龙属的物种多样性和系统学（Anura，细齿龙科）：诊断特征和圭亚那地盾一新种综述

黑尾细趾猴种群是广泛分布于新热带地区的无尾猿分支。由于分类学知识不完整、物种边界和分布不明确，该支系包含许多难以识别的物种。本文通过分析600多个个体的mtDNA序列，划分操作分类单位(OTUs)，并通过将序列与形态和叫声联系起来，更新物种鉴定和分布，扩大了对该纤毛纲物种多样性的认识。此外，我们还回顾了该类群中常用的形态学和声学特征。基于dna的物种划分分析得到57个OTUs。鉴于目前仅有19个分类群被确认为有效种，我们的结果表明在L. melanonotus群中存在许多未命名的物种。在重新评估了种群的形态特征后，我们得出结论，在大多数情况下，背外侧褶皱、上唇条纹和腹部颜色的组合使用足以提供物种识别的信息，特别是当与地理分布和栖息地利用数据相关联时。对于广告叫声，调幅和调频模式、叫声率和优势频率也能提供物种区分的信息。此外，我们为L. wagneri指定了一个新型，并描述了其广告召唤，并与L. melanonotus类群的同系物，特别是与部分同域的leptodactyloides进行了比较。最后，我们命名并描述了东圭亚那地盾特有的一种新物种。L. melanonotus类群的分布模式和生境利用表明，同域事件更常见于远亲物种，而异域事件对应于近亲物种。类群近亲物种之间的物种形成似乎与生态分化(开放与森林栖息地)有关，同时也与明显的形态和声学分化有关。http://www.zoobank.org/urn:lsid:zoobank.org:pub:867A8EA9-A8F2-4FA4-8746-A0D9BB2E4286

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来源期刊

Systematics and Biodiversity 环境科学-生物多样性保护

CiteScore

4.10

自引率

0.00%

发文量

审稿时长

>24 weeks

期刊介绍： Systematics and Biodiversity is devoted to whole-organism biology. It is a quarterly, international, peer-reviewed, life science journal, without page charges, which is published by Taylor & Francis for The Natural History Museum, London. The criterion for publication is scientific merit. Systematics and Biodiversity documents the diversity of organisms in all natural phyla, through taxonomic papers that have a broad context (not single species descriptions), while also addressing topical issues relating to biological collections, and the principles of systematics. It particularly emphasises the importance and multi-disciplinary significance of systematics, with contributions which address the implications of other fields for systematics, or which advance our understanding of other fields through taxonomic knowledge, especially in relation to the nature, origins, and conservation of biodiversity, at all taxonomic levels. The journal does not publish single species descriptions, monographs or applied research nor alpha species descriptions. Taxonomic manuscripts must include modern methods such as cladistics or phylogenetic analysis.