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Multigene phylogeny of blister beetles (Coleoptera, Meloidae) reveals extensive polyphyly of the tribe Lyttini and allows redefining its boundaries 水泡甲虫(鞘翅目、甜瓜科)的多基因系统发育揭示了Lyttini部落广泛的多系性,并允许重新定义其边界
IF 4.8 1区 农林科学 Q1 ENTOMOLOGY Pub Date : 2022-04-04 DOI: 10.1111/syen.12547
A. Riccieri, E. Mancini, M. Pitzalis, D. Salvi, M. Bologna
Meloidae is a beetle family with about 3000 species divided into three subfamilies and 16 tribes. Included is the tribe Lyttini containing 33 genera and about 400 species. However, the boundaries of Lyttini have proved hard to define since the systematics of this tribe have repeatedly changed. In this study, we investigated the phylogeny of Lyttini and tested for its monophyly based on a comprehensive molecular dataset of mitochondrial (COI and 16S) and nuclear (CAD and 28S) genes including 57 genera and 385 species representing most of the tribes of Meloidae. Further phylogenetic analyses were performed on a reduced taxon set (51 genera and 135 species covering 60% of the generic diversity of Lyttini) in order to maximize the number of loci and minimize missing data. Phylogenetic results strongly supported the monophyly of most of the tribes of the subfamily Meloinae, apart from Lyttini, which is split into 11 phylogenetically distinct lineages scattered throughout the tree. Based on these results, we restrict the tribe Lyttini to the genera Alosimus Mulsant, Lydus Dejan, Lytta Fabricius, Muzimes Mulsant & Rey and Oenas Latreille, all exclusive to the Holarctic region. The relationships among the remaining genera previously included in Lyttini and the other 10 lineages representing ‘non‐Lyttini’ tribes remain to be clarified. This study also provides a number of nomenclatural acts [including Pseudolytta n. stat.; Lytta (Taurilytta) n. subgen.; Lytta (Teratolytta) n.stat.; Mimovesperus resurrected; Denierella = Epicauta n.syn.; Psalydolytta = Epicauta n. syn.] and working hypotheses for future investigations on the systematics of Meloidae.
虫科是一个甲虫科,约有3000种,分为3个亚科和16个部落。包括Lyttini部落,包含33属,约400种。然而,由于这个部落的系统分类不断变化,Lyttini的边界很难界定。基于线粒体(COI和16S)和细胞核(CAD和28S)基因的综合分子数据集,对Lyttini的系统发育进行了研究,并对其单系性进行了检验,其中包括57属385种,代表了Meloidae的大多数部落。为了最大限度地增加基因座数量和减少缺失数据,我们对一个简化的分类群(51属135种,占Lyttini属多样性的60%)进行了进一步的系统发育分析。系统发育结果有力地支持了Meloinae亚科大多数部落的单系性,除了Lyttini,它被分成11个系统发育上不同的谱系,分散在整个树中。基于这些结果,我们将Lyttini部落限制在Alosimus Mulsant, Lydus Dejan, Lytta Fabricius, Muzimes Mulsant & Rey和Oenas Latreille属,这些都是Holarctic地区独有的。先前包括在Lyttini中的其余属与代表“非Lyttini”部落的其他10个谱系之间的关系仍有待澄清。这项研究还提供了一些命名行为[包括假吕塔n. stat.;利塔(塔利塔)n.亚根;利塔(塔);Mimovesperus复活;Denierella = Epicauta n.;《诗篇》[译]及对未来旋律科分类学研究的工作假设。
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引用次数: 9
Phylogenomics of the Aphididae: Deep relationships between subfamilies clouded by gene tree discordance, introgression and the gene tree anomaly zone 蚜虫科的系统基因组学:被基因树不一致、基因渗入和基因树异常区遮蔽的亚科之间的深层关系
IF 4.8 1区 农林科学 Q1 ENTOMOLOGY Pub Date : 2022-03-17 DOI: 10.1111/syen.12542
Christopher L. Owen, Gary L. Miller

Aphids (Hemiptera: Aphididae) are a lineage of ~5200 plant-feeding insects most abundant in temperate regions. The diversification of aphids is thought to be a rapid radiation, whereas abiotic and biotic factors heavily influence the morphologies. These factors have clouded the taxonomy at all taxonomic ranks, and the effect can be viewed in many incongruent molecular and morphological phylogenies. In this study, we address this problem using both genome and transcriptome data to estimate the phylogenomic relationships between 12 subfamilies with 48 ingroup taxa. We predicted a novel well-curated dataset of phylogenetically consistent orthologues that included 3162 genes to estimate a concatenated maximum likelihood and multi-species coalescent species trees. Our results suggest that there are three main clades of Aphididae subfamilies, which are congruent with a previous Sanger sequencing-based phylogenetic study. However, the relationship between the three clades of subfamilies is clouded by gene tree discordance, introgression and parent–child branches along the backbone that fall within the gene tree anomaly zone. In addition, our results suggest an introgression event between two agriculturally important species of aphids within the subfamily Aphidinae. Our research provides the first phylogenomic study of the Aphididae subfamilies and a foundation for future molecular and morphological studies into this adaptive radiation of insects.

蚜虫(半翅目:蚜虫科)是一种约5200种植物食性昆虫,主要分布在温带地区。蚜虫的多样化被认为是一种快速辐射,而非生物和生物因素对蚜虫的形态有很大影响。这些因素影响了所有分类等级的分类,并在许多不一致的分子和形态系统发生中可以看到这种影响。在这项研究中,我们利用基因组和转录组数据来估计12个亚科与48个群内分类群之间的系统基因组关系。我们预测了一个新的精心策划的数据集,其中包括3162个基因,用于估计串联的最大似然和多物种聚结的物种树。我们的研究结果表明,蚜虫亚科有三个主要分支,这与先前基于Sanger测序的系统发育研究是一致的。然而,由于基因树不一致、基因渗入和位于基因树异常区的骨干上的亲子分支,亚家族的三个分支之间的关系模糊不清。此外,我们的研究结果表明,在蚜虫亚科中,两种重要的农业蚜虫物种之间存在渗入事件。我们的研究为蚜虫亚科的首次系统发育研究提供了基础,并为未来昆虫适应辐射的分子和形态学研究奠定了基础。
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引用次数: 5
Machine learning for expert-level image-based identification of very similar species in the hyperdiverse plant bug family Miridae (Hemiptera: Heteroptera) 基于专家级图像的高度多样化植物昆虫科Miridae非常相似物种识别的机器学习(半翅目:异翅目)
IF 4.8 1区 农林科学 Q1 ENTOMOLOGY Pub Date : 2022-03-17 DOI: 10.1111/syen.12543
Alexander Popkov, Fedor Konstantinov, Vladimir Neimorovets, Alexey Solodovnikov

Deep learning algorithms and particularly convolutional neural networks are very successful in pattern recognition from images and are increasingly employed in biology. The development of automated systems for rapid and reliable species identification is vital for insect systematics and may revolutionize this field soon. In this study, we demonstrate the ability of a convolutional neural network to identify species based on habitus photographs with expert-level accuracy in a taxonomically challenging group where a human-based identification would require notorious genitalia dissections. Using the economically important and polymorphic plant bug genus Adelphocoris Reuter (Heteroptera: Miridae) as a model group, we explore the variability in the performance of 11 convolutional neural models most commonly used for image classification, test the role of class-imbalance on the model performance assessment and visualize areas of interest using three interpretation algorithms. Classification performance in our experiments with collection-based habitus photographs is high enough to identify very similar species from a large group with an expert-level accuracy. The accuracy is getting lower only in the experiments with an additional dataset of Adelphocoris and other live plant bugs photographs taken from the Web. Our article demonstrates the importance of comprehensive institutional insect collections for bringing deep learning algorithms into service for systematic entomology using affordable equipment and methods.

深度学习算法,特别是卷积神经网络在图像模式识别方面非常成功,并且越来越多地应用于生物学。开发快速可靠的物种识别自动化系统对昆虫分类学至关重要,并可能在不久的将来彻底改变这一领域。在这项研究中,我们展示了卷积神经网络在一个具有分类学挑战性的群体中以专家水平的准确性识别基于习性照片的物种的能力,其中基于人类的识别将需要臭名昭着的生殖器解剖。以具有重要经济意义和多态性的植物蝽属(Adelphocoris Reuter,异翅目:Miridae)为模型组,研究了11种最常用于图像分类的卷积神经模型性能的可变性,测试了类不平衡对模型性能评估的作用,并使用三种解释算法可视化感兴趣的区域。在我们的实验中,基于收集的习性照片的分类性能足够高,可以以专家级的精度从一个大的群体中识别出非常相似的物种。只有在使用额外的Adelphocoris数据集和其他从网上拍摄的活的植物昆虫照片进行实验时,准确性才会降低。我们的文章展示了全面的机构昆虫收集对于使用负担得起的设备和方法将深度学习算法应用于系统昆虫学的重要性。
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引用次数: 5
Integrative taxonomy solves taxonomic impasses: a case study from Epyrinae (Hymenoptera, Bethylidae) 综合分类学解决了分类学上的僵局:以膜翅目叶蝉科叶蝉为例
IF 4.8 1区 农林科学 Q1 ENTOMOLOGY Pub Date : 2022-03-17 DOI: 10.1111/syen.12544
Wesley D. Colombo, Carly M. Tribull, Cecilia Waichert, Celso O. Azevedo

We apply integrative taxonomy to solve a historical taxonomic impasse in a flat wasp group (Hymenoptera, Bethylidae). The phylogeny of Epyrinae is inferred with parsimony analyses under equal and implied weights, maximum likelihood and Bayesian inference using the nuclear markers 18S and 28S, the mitochondrial genes 16S, cytochrome oxidase subunit I and cytochrome B and 232 morphological characters. This is the first phylogenetic study to examine all 42 epyrine genera, including junior synonyms and extinct taxa, applying a combined molecular and morphological approach. This study considered 186 terminal taxa with 166 representing the ingroup taxa and 20 outgroup taxa. All resulting trees of the combined analyses recovered Anisepyris Kieffer, Aspidepyris Evans, Bakeriella Kieffer, Disepyris Kieffer, Laelius Ashmead and Trachepyris Kieffer as monophyletic; Chlorepyris Kieffer, Epyris Westwood, Formosiepyris Terayama and Holepyris Kieffer are non-monophyletic. Calyozina Enderlein is recovered as an independent lineage in implied weights, Bayesian and maximum likelihood topologies. Here, we describe three new genera and revalidate six genera, five of them junior synonyms of Epyris and one of Holepyris. In addition, we analysed the presence/absence of a sulcus between the mesoscuto-scutellar foveae and the shape of mesoscuto-scutellar foveae as the most important taxonomic characters for Epyrinae using ancestral state reconstruction. Finally, we provide a checklist of all species of Epyrinae, compiled via direct observation of the type, illustrations, or literature and an updated and illustrated taxonomic key for all epyrine genera.

我们应用综合分类学来解决一个扁平黄蜂群(膜翅目,白蜂科)的历史分类学僵局。利用核标记18S和28S、线粒体基因16S、细胞色素氧化酶亚基I和细胞色素B以及232个形态学特征,通过等权和隐含权、最大似然和贝叶斯推理,对黄蚕科的系统发育进行了简约分析。这是第一次应用分子和形态学相结合的方法对所有42个epyrine属进行系统发育研究,包括初级同义词和已灭绝的分类群。本研究共考虑了186个终端分类群,其中群内分类群166个,群外分类群20个。所有组合分析的结果树都恢复了Anisepyris Kieffer, Aspidepyris Evans, Bakeriella Kieffer, Disepyris Kieffer, Laelius Ashmead和气管pyris Kieffer为单系;Kieffer chlorrepyris, Epyris Westwood, Formosiepyris Terayama和Holepyris Kieffer是非单系的。Calyozina Enderlein被恢复为隐含权重、贝叶斯和最大似然拓扑中的独立谱系。在这里,我们描述了3个新属,并重新验证了6个属,其中5个是Epyris的初级同义词,1个是Holepyris的初级同义词。此外,我们还利用祖先状态重建分析了中脑中央窝之间是否存在沟和中脑中央窝的形状作为柱头龙最重要的分类特征。最后,我们提供了一份通过直接观察类型、插图或文献汇编的所有Epyrinae物种清单,以及所有epyrinine属的更新和插图分类键。
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引用次数: 9
Genomics-based higher classification of the species-rich hairstreaks (Lepidoptera: Lycaenidae: Eumaeini) 基于基因组学的富种毛纹高级分类(鳞翅目:灰蛾科:姬蛾)
IF 4.8 1区 农林科学 Q1 ENTOMOLOGY Pub Date : 2022-03-08 DOI: 10.1111/syen.12541
Robert K. Robbins, Qian Cong, Jing Zhang, Jinhui Shen, Robert C. Busby, Christophe Faynel, Marcelo Duarte, Ananda R. P. Martins, Carlos Prieto, Gerardo Lamas, Nick V. Grishin

We propose a higher classification of the lycaenid hairstreak tribe Eumaeini – one of the youngest and most species-rich butterfly tribes – based on autosome, Lepidopteran Z sex chromosome and mitochondrial protein-coding genes. The subtribe Neolycaenina Korb is a synonym of Callophryidina Tutt and subtribe Tmolusina Bálint is a synonym of Strephonotina K. Johnson, Austin, Le Crom, & Salazar. Proposed names are Rhammina Prieto & Busby, new subtribe; Timaetina Busby & Prieto, new subtribe; Atlidina Martins & Duarte, new subtribe; Evenina Faynel & Grishin, new subtribe; Jantheclina Robbins & Faynel, new subtribe; Paiwarriina Lamas & Robbins, new subtribe; Cupatheclina Lamas & Grishin, new subtribe; Parrhasiina Busby & Robbins, new subtribe; Ipideclina Martins & Grishin, new subtribe; and Trichonidina Duarte & Faynel, new subtribe. Phylogenetic results from the autosome and Z sex chromosome analyses are similar. Future analyses of datasets with hundreds of terminal taxa may be more practical time-wise by focussing on the smaller number of sex chromosome sequences (2.6% of nuclear protein-coding sequences). The phylogenetic classification and biological summaries for each subtribe suggest that a variety of factors affected Eumaeini diversification. About a dozen kinds of male secondary sexual organs with frequent evolutionary gains and losses occur in Atlidina, Evenina and Jantheclina (141 species combined). Females have been shown to use these organs to discriminate between conspecific and nonconspecific males, facilitating sympatry among close relatives. Eumaeina, Rhammina and Timaetina (140 species combined) are overwhelmingly montane with some evidence for a higher incidence of sympatric diversification. Seven Neotropical lineages in five subtribes invaded the temperate parts of the Nearctic Region with a diversification increase in the Callophryidina (262 species). North American Satyrium and Callophrys then invaded the Palearctic at least once each, with a major species-richness increase in Satyrium. The evolution of litter-feeding detritivores within Calycopidina (172 species) resulted in an increase in diversification rate compared with its flower-feeding sister lineage. Atlidina, Strephonotina, Parrhasiina and Strymonina (562 species combined) each contain a mixture of genera that specialize on one or two caterpillar food plant families and genera that are polyphagous. These would be appropriate subtribes to assess how the breadth of caterpillar food plants and the frequency of host shifts affected diversification.

基于常染色体、鳞翅目Z型性染色体和线粒体蛋白编码基因,我们提出了一个更高级的lycaenid hairstreak tribe Eumaeini——最年轻和物种最丰富的蝴蝶部落之一。Neolycaenina Korb亚族是Callophryidina Tutt的同义词,Tmolusina Bálint亚族是Strephonotina K. Johnson, Austin, Le Crom, &萨拉查。建议的名字是Rhammina Prieto &巴斯比,新的分支;蒂玛蒂娜·巴斯比&;普列托,新的亚部落;阿蒂娜·马丁斯&;Duarte,新亚族;Evenina Faynel &;Grishin,新亚族;珍妮莉娜·罗宾斯&;Faynel,新分支;派瓦里纳喇嘛& &;罗宾斯,新部落;Cupatheclina Lamas &;Grishin,新亚族;巴斯比&;罗宾斯,新部落;艾德琳娜·马丁斯Grishin,新亚族;和Trichonidina Duarte &;费内尔,新部落。常染色体和Z性染色体的系统发育分析结果相似。未来对数百个终端分类群的数据集的分析可能会更实际,从时间上讲,将重点放在较少数量的性染色体序列上(2.6%的核蛋白编码序列)。各亚族的系统发育分类和生物学总结表明,多种因素影响了真马属的多样化。在Atlidina、Evenina和Jantheclina(共141种)中,有十几种雄性第二性器官存在着频繁的进化得失。雌性已经被证明使用这些器官来区分同种和非同种的雄性,促进近亲之间的同情。Eumaeina, Rhammina和Timaetina(共140种)绝大多数是山地植物,有证据表明它们的同域多样化发生率较高。5个亚部落的7个新热带谱系入侵了新北极地区的温带地区,其中Callophryidina的多样性增加(262种)。随后,北美Satyrium和Callophrys各入侵古北大陆至少一次,Satyrium的物种丰富度大幅增加。花萼科(Calycopidina)(172种)的凋落物食性动物的进化导致其多样化程度高于其花食性姐妹系。Atlidina, Strephonotina, Parrhasiina和Strymonina(共562种)每一种都包含一个混合属,专门针对一个或两个毛虫食性植物科和多食性属。这些是评估毛虫食物植物的宽度和寄主转移的频率如何影响多样化的适当亚群。
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引用次数: 6
Dense sampling of taxa and characters improves phylogenetic resolution among deltocephaline leafhoppers (Hemiptera: Cicadellidae: Deltocephalinae) 密集的分类群和特征取样提高了三角头叶蝉的系统发育分辨率(半翅目:蝉科:三角头叶蝉科)
IF 4.8 1区 农林科学 Q1 ENTOMOLOGY Pub Date : 2022-02-18 DOI: 10.1111/syen.12540
Yanghui Cao, Christopher H. Dietrich, James N. Zahniser, Dmitry A. Dmitriev

We analysed a phylogenomic dataset comprising 730 terminal taxa and >160,000 nucleotide positions obtained using anchored hybrid enrichment of genomic DNA for a sample of deltocephaline leafhoppers and outgroups. Maximum likelihood analyses of concatenated nucleotide and amino acid sequences as well as coalescent gene tree analysis, yielded well-resolved phylogenetic estimates that were highly congruent with most branches receiving maximum support. Some topological incongruence occurs among the trees resulting from different analyses, mainly distributed among very short branches at intermediate levels in the phylogeny, pertaining to relationships among some tribes and multi-tribe lineages restricted to particular continents. Coalescent gene tree analysis revealed extensive gene tree conflict at these nodes, suggesting that certain relationships may remain difficult to resolve consistently even with genome-scale datasets and dense taxon sampling. Ancestral character state reconstruction of feeding preference indicates that grass specialization has been acquired three or fewer times in some highly diverse but relatively derived lineages. Molecular divergence time estimation suggests that the earliest divergences in the subfamily occurred during the Cretaceous but that most modern tribes did not appear until after the Cretaceous–Palaeogene boundary and that grass specialist lineages generally diversified and spread at the same time as grasslands were becoming widespread globally. These analyses also show a high level of global biogeographic structure, with several large lineages of primarily arboreal deltocephalines restricted to particular regions or continents and long-distance dispersal among continents occurring primarily among grass-specialist lineages. The results represent a major improvement over previous analyses of this diverse subfamily, which were based on 152 or fewer taxa and data from morphology and partial sequences of two genes.

我们分析了一个系统基因组数据集,其中包括730个终端分类群和160,000个核苷酸位置,这些数据是通过锚定杂交富集的基因组DNA获得的,用于delta - cephaline叶蝉和外群样本。对串联核苷酸和氨基酸序列的最大似然分析以及聚结基因树分析,得到了与大多数分支高度一致的系统发育估计,得到了最大的支持。由于不同的分析结果,树木之间存在一些拓扑不一致,主要分布在系统发育的中间水平的非常短的分支中,涉及某些部落和多部落谱系之间的关系,这些关系仅限于特定大陆。聚结基因树分析显示,在这些节点上存在广泛的基因树冲突,这表明即使使用基因组规模的数据集和密集的分类单元采样,某些关系可能仍然难以一致地解决。食性偏好的祖先特征状态重建表明,在一些高度多样化但相对派生的世系中,草的专门化发生了3次或更少的时间。分子分化时间估计表明,该亚科最早的分化发生在白垩纪,但大多数现代部落直到白垩纪-古近纪边界之后才出现,而草专科谱系一般是在草原在全球范围内广泛分布的同时多样化和传播的。这些分析还显示了高水平的全球生物地理结构,主要是树栖三角头鲸的几个大谱系局限于特定地区或大陆,而大陆之间的长距离传播主要发生在草专谱系中。该结果代表了对这个多样化亚家族的先前分析的重大改进,这些分析基于152或更少的分类群和来自两个基因的形态学和部分序列的数据。
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引用次数: 21
Hitchhiking into the future on a fly: Toward a better understanding of phoresy and avian louse evolution (Phthiraptera) by screening bird carcasses for phoretic lice on hippoboscid flies (Diptera) 搭乘飞机进入未来:通过筛选鸟类尸体上的马尾蝇(双翅目)上的翅虱,更好地了解翅虱和鸟虱的进化(翅翅目)
IF 4.8 1区 农林科学 Q1 ENTOMOLOGY Pub Date : 2022-02-18 DOI: 10.1111/syen.12539
Leshon Lee, David J. X. Tan, Jozef Oboňa, Daniel R. Gustafsson, Yuchen Ang, Rudolf Meier

Many phoretic relationships between arthropods are understudied because of taxonomic impediments. We here illustrate for avian lice riding on hippoboscid flies how new natural history data on phoretic relationships can be acquired quickly with modern and cost-effective barcoding techniques. Most avian lice are host-specific, but some can arrive on new hosts by hitchhiking on hippoboscid flies that feed on bird blood. Our summary of the literature yielded 254 published records which we here show to belong to two large and 13 small interaction networks for birds, flies, and lice. In order to generate new records, we developed a protocol based on screening bird carcasses sourced with the help of citizen scientists. The inspection of 131 carcasses from Singapore led to the first record of a Guimaraesiella Eichler (Ischnocera: Philopteridae) louse species riding on Ornithoica momiyamai Kishida flies collected from a pitta carcass. Phoresy may explain why this louse species is now known from three phylogenetically disparate hosts (Pitta moluccensis (Müller), Ficedula zanthopygia (Hay); Pardaliparus elegans Lesson). A second new case of phoresy enhanced a large interaction network dominated by Ornithophila metallica (Schiner), a cosmopolitan and polyphagous hippoboscid fly species. Overall, we argue that many two- and three-way phoretic relationships between arthropods (e.g., mites, pseudoscorpions, beetles, flies) can be resolved with cost-effective large-scale NGS barcoding, which can be used to partially overcome taxonomic impediments by pre-sorting specimens for taxonomic revision.

由于分类学上的障碍,节肢动物之间的许多遗传关系尚未得到充分研究。我们在这里举例说明了如何利用现代和经济有效的条形码技术快速获取有关遗传关系的新的自然历史数据。大多数鸟类虱子都是宿主特异性的,但有些虱子可以搭乘以鸟类血液为食的海马蝇到达新的宿主。我们对文献进行了总结,得到了254条已发表的记录,我们在这里展示了它们属于鸟类、苍蝇和虱子的两个大型和13个小型相互作用网络。为了产生新的记录,我们在公民科学家的帮助下制定了一项基于筛选鸟类尸体的协议。对来自新加坡的131具尸体进行了检查,首次记录了从皮塔尸体上收集的一种吉玛拉氏艾希勒(蝇目:飞蛾科)虱子骑在桃山鸟蝇上。Phoresy可以解释为什么这个虱子物种现在从三个系统发育不同的宿主(Pitta moluccensis (m ller), Ficedula zanthopygia (Hay);秀丽隐杆线虫。第二个新的phoresy案例增强了一个由嗜鸟蝇(ornithila metallica)(一种世界性的多食海马蝇种)主导的大型相互作用网络。总体而言,我们认为节肢动物(如螨虫、假蝎子、甲虫、苍蝇)之间的许多双向和三方遗传关系可以通过成本效益高的大规模NGS条形码来解决,这可以通过预先分类标本进行分类修订来部分克服分类障碍。
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引用次数: 8
DNA barcodes on their own are not enough to describe a species DNA条形码本身不足以描述一个物种
IF 4.8 1区 农林科学 Q1 ENTOMOLOGY Pub Date : 2022-01-22 DOI: 10.1111/syen.12538
Alireza Zamani, Zdenek Faltýnek Fric, Hugo F. Gante, Tapani Hopkins, Alexander B. Orfinger, Mark D. Scherz, Alena Sucháčková Bartoňová, Davide Dal Pos
<p>Earth's biodiversity is still so poorly known that only about two million (Bánki et al., <span>2021</span>) of the estimated nine million or more eukaryotic species (Larsen et al., <span>2017</span>; Mora et al., <span>2011</span>) have been described. This puts taxonomists in a race against time to discover biodiversity before it is lost as a result of the Anthropocene mass extinction. Each species description is the result of an often long and time-consuming process that has involved collecting specimens, processing them, discovering their correct place in the tree of life and describing the species and its diagnostic characters from other related species. Currently, about 18,000 species are described each year, which means that species are going extinct at least as fast as they are named (Ceballos et al., <span>2015</span>; De Vos et al., <span>2015</span>; Zamani et al., <span>2021</span>). This ‘taxonomic impediment’ has been recognized as a serious problem (de Carvalho et al., <span>2007</span>) and has led to several proposed solutions (e.g., Engel et al., <span>2021</span>; Rodman & Cody, <span>2003</span>).</p><p>In response to the slow and often cumbersome process of describing species, Meierotto et al. (<span>2019</span>) proposed what they later named a ‘minimalist’ approach. They named 18 new species of Costa Rican braconid wasps based almost solely on their consensus COI barcodes while neglecting to give differential diagnoses to those already described species in the same genera that lacked barcodes. This approach was criticized by Zamani et al. (<span>2021</span>), shortly before Sharkey, Janzen, et al. (<span>2021</span>) named 403 braconid species in the same way while also responding to the criticism. Later, Sharkey, Brown, et al. (<span>2021</span>) published a more detailed response in which they defended their approach. The ‘minimalist’ approach has also been recently criticized or commented on by Ahrens et al. (<span>2021</span>), Engel et al. (<span>2021</span>), Fernandez-Triana (<span>2021</span>) and Meier et al. (<span>2021</span>).</p><p>In this article, we continue this discussion by responding to Sharkey, Brown, et al. (<span>2021</span>). We summarize the main points of concern raised by us (and others) regarding the ‘minimalist’ approach, expand on some points discussed earlier and explain why we think morphology should remain an integral part of species descriptions. To be clear, we oppose the view of Meierotto et al. (<span>2019</span>) and Sharkey, Janzen, et al. (<span>2021</span>) on DNA barcoding as the only source of information for species <i>delimitation</i> and <i>description</i> purposes, and not as a valuable tool in an initial survey of biodiversity.</p><p>The default assumption of Sharkey, Janzen, et al. (<span>2021</span>) is that COI barcode clusters (Barcode Index Numbers [or BINs] computed by BOLD systems) equate to species. This assumption has been heavily criticized, especially by Meier
然而,尽管他们的工作非常宝贵,但由于涉及的费用和/或缺乏分析序列数据的专业知识,他们无法直接获得分子技术。因此,取消形态学方法而采用条形码的做法将使整个分类学学科的宝贵专家群体疏远,从而降低我们描述大多数新物种和产生有价值的分类学处理方法的能力。这样一来,对于Sharkey, Brown等人(2021)一直提到的目的,即在为时已晚之前描述物种,仅使用条形码的方法将变得有害。我们还认为,Sharkey, Brown等人(2021)在实施极简主义方法时,错过了与哥斯达黎加生物多样性科学家合作促进分类学的机会。他们可能把他们的部分(para)类型分散在几个机构中。相反,数百个标本中没有一个存放在哥斯达黎加的收藏中,甚至也没有存放在加拿大以外的地方。这极大地破坏了在他们的研究中建立哥斯达黎加科学界能力的任何机会,这是一种对抗分类学障碍的策略(Britz et al., 2020)。虽然模式标本在极简分类学中可能没有条形码那么重要,但它们的位置仍然不是无关紧要的;事实上,Sharkey, Brown等人(2021)认为,极简描述是“第一关”,稍后将使用形态学数据进行更新。这只有在标本可接近的情况下才有可能。一个主要的问题是,极简方法与已建立的(主要是形态学的)分类学不相容。Ahrens等人(2021)特别担心这将导致两种相互竞争的分类系统,其中一种基于DNA条形码描述物种,另一种主要基于形态学,两者都“认为另一方的[物种]名称值得怀疑”。Sharkey, Baker等人(2021)和Sharkey, Brown等人(2021)并没有给出这个问题的解决方案,但建议通过向极简描述中添加形态学数据和/或对现有模式标本进行测序,直到系统之间的差距被弥合。在我们看来,这个问题本身就足以使极简主义方法站不住脚。维护并行系统会导致大量的问题。大多数已经进化的物种现在已经灭绝,其中许多物种在形态上与它们现存的近亲不同(Wiens, 2004)。难道我们要忽略99%曾经存在过的物种,把古生物学完全排除在我们的进化史研究之外吗(诺瓦切克&惠勒,1992),直到极简主义的描述最终被形态学数据更新?许多(如果不是大多数的话)分类学家不能对他们的分类群进行测序,要么是因为成本、古老的博物馆标本的古董或保护价值,要么是因为名古屋议定书等法律不允许这样做。他们是否必须等到测序技术和成本得到改善,或者他们是否需要依赖资金充足的实验室或高收入国家的资助?所有这些问题都可以通过首先编写一个综合描述来避免。话虽如此,我们相信使用基于dna的分析对新物种和已知物种的初步分类作为第一步是非常有用的,但对于完整和可靠的物种假设,条形码序列需要伴随着其他证据,在这种情况下,高质量的诊断照片和最小的可诊断形态特征。在Meierotto等人(2019)的案例中,这是可能的,因为新物种的形态特征已在Meierotto(2018)中给出。我们认为,由于希望展示极简主义方法,文章本身没有提到这些字符。我们认为,考虑到这篇文章有23位作者,提供这些信息也不应该涉及到Sharkey, Janzen等人(2021)的太多工作。事实上,Sharkey, Baker等人(2021)最近在这个方向上迈出了一步,他们在非常相似的物种中进行了一些形态学诊断。在平行分类法的背景下,我们觉得我们应该简要地澄清一个误解,这是Sharkey, Baker等人(2021)和Sharkey, Brown等人(2021)特有的,而不是一般的极简主义方法。Meierotto等人(2019)在首次提出极简主义方法时,未能将基于DNA条形码的新物种与无法获得条形码的现有物种合并。未提供已知种Zelomorpha Ashmead和Hemichoma Enderlein(除Z. arizonensis Ashmead外)的序列,也未提供新种的形态学诊断(除大多数种的寄主数据外,但在诊断之外)。相反,有人说迈克尔·夏基看到了现存物种的类型,并证实它们是不同的。当Zamani等人。
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引用次数: 26
Higher classification of mealybugs (Hemiptera: Coccomorpha) inferred from molecular phylogeny and their endosymbionts 从分子系统发育及其内共生体推断出粉蚧的高级分类(半翅目:粉蚧科)
IF 4.8 1区 农林科学 Q1 ENTOMOLOGY Pub Date : 2022-01-22 DOI: 10.1111/syen.12534
Jinyeong Choi, Seunghwan Lee

Mealybugs (Hemiptera: Pseudococcidae, Rhizoecidae and Xenococcidae) are important organisms for understanding processes of evolution, especially microbial symbiotic systems and interactions with host plants. Molecular phylogenetic trees were reconstructed for 128 species of mealybug using DNA fragments of eight loci, namely a mitochondrial (COI), nuclear ribosomal RNA (18S and 28S D2 and D10) and nuclear protein-encoding genes (EF-1α 5′ and 3′, Dynamin and wingless). In addition, data on the types of obligate endosymbionts were used to test the monophyly of major groups resulting from this molecular phylogeny. Based on the data from DNA sequences, morphology and obligate endosymbionts, we present a phylogeny supporting the families Rhizoecidae and Xenococcidae separate from Pseudococcidae, and the separation of Rastrococcus Ferris from Phenacoccinae and Pseudococcinae. Consequently, Rastrococcus is excluded from Phenacoccinae and elevated to subfamily Rastrococcinae subfam. nov. We also found support for Putoidae as a family distinct from the true mealybugs. Phenacoccus rubicola Kwon, Danzig & Park is transferred to Coccura Šulc.

粉蚧(半翅目:假球虫科、根球虫科和异球虫科)是了解进化过程,特别是微生物共生系统和与寄主植物相互作用的重要生物。利用线粒体(COI)、核糖体RNA (18S和28S D2和D10)和核蛋白编码基因(EF-1α 5′和3′、Dynamin和wingless) 8个位点的DNA片段,对128种粉蚧的分子系统发育树进行了重建。此外,利用专性内共生体类型的数据来检验这种分子系统发育所产生的主要类群的单一性。基于DNA序列、形态和专一性内共生的数据,我们提出了一个支持根球菌科和Xenococcidae从Pseudococcidae中分离出来的系统发育,以及铁球菌从Phenacoccinae和Pseudococcinae中分离出来的系统发育。因此,葡萄球菌被排除在非那球菌亚科之外,并上升到葡萄球菌亚科。11 .我们还发现支持粉蚧科作为一个不同于真正粉蚧的科。但泽红霉素;朴智元被调任到科库拉Šulc。
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引用次数: 8
Diversification in and around the Atlas Mountains: Insights into the systematics and biogeography of the genus Thalpomena (Orthoptera: Acrididae: Oedipodinae) 阿特拉斯山脉及其周边地区的多样性:沙蚤属的系统学和生物地理学研究(直翅目:蝗科:沙蚤科)
IF 4.8 1区 农林科学 Q1 ENTOMOLOGY Pub Date : 2022-01-22 DOI: 10.1111/syen.12537
Lara-Sophie Dey, Axel Hochkirch, Abdelhamid Moussi, Marianna V. P. Simões, Martin Husemann

The genus Thalpomena Saussure comprises nine species and four subspecies and is largely endemic to the Atlas Mountains (North Africa). Here, we used an evolutionary taxonomic approach to differentiate the species of the genus Thalpomena and to reconstruct their biogeographic history. Phylogenetic tree reconstruction based on five molecular markers revealed four distinct clades within the genus Thalpomena. These are not fully in line with the current taxonomy but rather seem to represent lineages defined by their distribution and hind wing banding patterns. All lineages are geographically separated and can be distinguished based on genetic, morphometric and ecological modelling data. Ancestral area reconstruction suggests an origin of the species in the southern regions of the Atlas Mountains (High Atlas to Aures Mountains). Molecular clock analysis promotes the glacial refugia theory, supporting the origin of Thalpomena in the Pliocene, followed by diversification events in the Pleistocene.

Thalpomena Saussure属包括9个种和4个亚种,主要是阿特拉斯山脉(北非)特有的。本文采用进化分类学的方法,对其种类进行了划分,并对其生物地理历史进行了重建。基于5个分子标记的系统发育树重建揭示了四种不同的分支。这些与目前的分类并不完全一致,但似乎代表了由它们的分布和后翅带模式定义的谱系。所有的谱系在地理上是分开的,可以根据遗传、形态计量和生态建模数据来区分。祖先区域重建表明该物种起源于阿特拉斯山脉南部地区(高阿特拉斯山脉到奥雷斯山脉)。分子钟分析支持冰川避难理论,支持塔尔波门亚起源于上新世,随后是更新世的多样化事件。
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引用次数: 3
期刊
Systematic Entomology
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