用单位点方法和地理上有限的数据划定山蚕属(志留目:毛虫科)种的不确定性和风险

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS ACS Applied Bio Materials Pub Date : 2022-01-01 DOI:10.1590/1982-0224-2022-0019
L. Donin, J. Ferrer, T. P. Carvalho
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引用次数: 2

摘要

Cambeva是一种分类复杂或在形态和地理分布方面划分不清的物种。我们对巴西南部至东南部沿海流域的Cambeva种群进行了广泛的回顾,通过形态学和分子数据(COI)的综合分析来评估物种的地理界限。通过与可诊断形态单元的比较,验证了贝叶斯泊松树过程(bPTP)和广义混合Yule聚结(GMYC)两种单位点方法在Cambeva物种边界划分中的有效性。使用GMYC,我们还评估了树和分子钟先验的组合来重建输入的系统发育,并评估了实现的模型与我们的经验数据的拟合程度。根据形态学诊断标准鉴定出11种:Cambeva balalios、c.b arbosae、c.b botuvera、c.c cubataonis、c.d davisi、c.c guaraquessaba、c.c iheringi、c.c tupinamba和c.z onata,其中2种为未描述种。与以往的认识不同,它们中的许多具有更广泛的分布和较高的种内变异。基于单位点的物种划界与形态学划界存在很大差异。这些分歧和对GMYC模型的违反表明,单位点数据不足以划分Cambeva物种,这种失败可能归因于线粒体渗入事件和不完整的谱系分类。
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Uncertainties and risks in delimiting species of Cambeva (Siluriformes: Trichomycteridae) with single-locus methods and geographically restricted data
Abstract Cambeva contains species with complex taxonomy or poorly delimitated in terms of morphology and geopraphic distribution. We conducted an extensive review of Cambeva populations from coastal drainages of Southern to Southeastern Brazil to evaluate species geographic limits with an integrative analysis including morphological and molecular data (COI). We test if two single-locus methods, Bayesian Poisson Tree Processes (bPTP) and Generalized Mixed Yule Coalescent (GMYC), are efficient to delimit species boundaries in Cambeva by the comparison with the diagnosable morphological units. Using GMYC, we also evaluated the combination of tree and molecular clock priors to reconstruct the input phylogeny and assessed how well the implemented model fitted our empirical data. Eleven species were identified using a morphological diagnosability criterion: Cambeva balios, C. barbosae, C. botuvera, C. cubataonis, C. davisi, C. guaraquessaba, C. iheringi, C. tupinamba, and C. zonata and two treated as undescribed species. In contrast with previous knowledge, many of them have wider distribution and high intraspecific variation. Species delimitation based on single-locus demonstrated incongruences between the methods and strongly differed from the morphological delimitation. These disagreements and the violation of the GMYC model suggest that a single-locus data is insufficient to delimit Cambeva species and the failure may be attributable to events of mitochondrial introgression and incomplete lineage sorting.
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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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