Description of the last stadium larva of<i>Somatochlora borisi</i>, with comparison to that of<i>Somatochlora metallica meridionalis</i>(Odonata: Corduliidae)

Fleck, Günther; Grand, Daniel; Boudot, Jean‐Pierre

doi:10.1080/13887890.2007.9748287

Cited by 5 publications

(5 citation statements)

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“…Conversely, the missing delimitation in Somatochlora metallica / S. meridionalis and Anax imperator / A. parthenope was unprecedented, also because no Italian samples and no COI barcode sequences at all for S. meridionalis were available before this study. This taxon was originally described as a subspecies of S. metallica (Nielsen, 1935) and elevated at species rank more recently (Schmidt, 1957); however, this status is still debated as intermediate specimens have been recorded in the contact areas (Fleck, Grand, & Boudot, 2007). S. meridionalis replaces S. metallica in southern Europe; in Italy, both the morphospecies occur with the former distributed in central and southern portions of the peninsula (and in two disjunct and isolated populations in the North) and the latter mainly spread in northern regions.…”

Section: Discussionmentioning

confidence: 99%

“…parthenope was unprecedented, also because no Italian samples and no COI barcode sequences at all for S. meridionalis were available before this study. This taxon was originally described as a subspecies of S. metallica (Nielsen, 1935) and elevated at species rank more recently (Schmidt, 1957); however, this status is still debated as intermediate specimens have been recorded in the contact areas (Fleck, Grand, & Boudot, 2007). S. meridionalis…”

Section: No Interspecific Delimitationmentioning

confidence: 99%

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Italian odonates in the Pandora's box: A comprehensive DNA barcoding inventory shows taxonomic warnings at the Holarctic scale

Galimberti

Assandri

Maggioni

et al. 2020

Molecular Ecology Resources

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The Odonata are considered among the most endangered freshwater faunal taxa. Their DNA‐based monitoring relies on validated reference data sets that are often lacking or do not cover important biogeographical centres of diversification. This study presents the results of a DNA barcoding campaign on Odonata, based on the standard 658‐bp 5′ end region of the mitochondrial COI gene, involving the collection of 812 specimens (409 of which barcoded) from peninsular Italy and its main islands (328 localities), belonging to all the 88 species (31 Zygoptera and 57 Anisoptera) known from the country. Additional BOLD and GenBank data from Holarctic samples expanded the data set to 1,294 DNA barcodes. A multi‐approach species delimitation analysis involving two distance (OT and ABGD) and four tree‐based (PTP, MPTP, GMYC and bGMYC) methods was used to explore these data. Of the 88 investigated morphospecies, 75 (85%) unequivocally corresponded to distinct molecular operational units, whereas the remaining ones were classified as ‘warnings’ (i.e. showing a mismatch between morphospecies assignment and DNA‐based species delimitation). These results are in contrast with other DNA barcoding studies on Odonata showing up to 95% of identification success. The species causing warnings were grouped into three categories depending on if they showed low, high or mixed genetic divergence patterns. The analysis of haplotype networks revealed unexpected intraspecific complexity at the Italian, Palearctic and Holarctic scale, possibly indicating the occurrence of cryptic species. Overall, this study provides new insights into the taxonomy of odonates and a valuable basis for future DNA and eDNA‐based monitoring studies.

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Section: Discussionmentioning

confidence: 99%

Section: No Interspecific Delimitationmentioning

confidence: 99%

Italian odonates in the Pandora's box: A comprehensive DNA barcoding inventory shows taxonomic warnings at the Holarctic scale

Galimberti

Assandri

Maggioni

et al. 2020

Molecular Ecology Resources

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“…The two species are morphologically very similar, yet show small but consistent differences in larval morphology and adult coloration ( Seidenbusch, 1996 ; Boudot & Kalkman, 2015 ). This has previously led to the suggestion that they should indeed be regarded as distinct species despite BIN sharing and the presence of intermediate phenotypes in regions of sympatric occurrence ( Fleck, Grand & Boudot, 2007 ). Yet, nuclear multilocus data are required to resolve the phylogenetic relationships and the extent of inter-specific gene flow in this species pair.…”

Section: Discussionmentioning

confidence: 99%

Coverage and quality of DNA barcode references for Central and Northern European Odonata

Geiger

Koblmüller

Assandri

et al. 2021

PeerJ

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Background Dragonflies and damselflies (Odonata) are important components in biomonitoring due to their amphibiotic lifecycle and specific habitat requirements. They are charismatic and popular insects, but can be challenging to identify despite large size and often distinct coloration, especially the immature stages. DNA-based assessment tools rely on validated DNA barcode reference libraries evaluated in a supraregional context to minimize taxonomic incongruence and identification mismatches. Methods This study reports on findings from the analysis of the most comprehensive DNA barcode dataset for Central European Odonata to date, with 103 out of 145 recorded European species included and publicly deposited in the Barcode of Life Data System (BOLD). The complete dataset includes 697 specimens (548 adults, 108 larvae) from 274 localities in 16 countries with a geographic emphasis on Central Europe. We used BOLD to generate sequence divergence metrics and to examine the taxonomic composition of the DNA barcode clusters within the dataset and in comparison with all data on BOLD. Results Over 88% of the species included can be readily identified using their DNA barcodes and the reference dataset provided. Considering the complete European dataset, unambiguous identification is hampered in 12 species due to weak mitochondrial differentiation and partial haplotype sharing. However, considering the known species distributions only two groups of five species possibly co-occur, leading to an unambiguous identification of more than 95% of the analysed Odonata via DNA barcoding in real applications. The cases of small interspecific genetic distances and the observed deep intraspecific variation in Cordulia aenea (Linnaeus, 1758) are discussed in detail and the corresponding taxa in the public reference database are highlighted. They should be considered in future applications of DNA barcoding and metabarcoding and represent interesting evolutionary biological questions, which call for in depth analyses of the involved taxa throughout their distribution ranges.

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“…The two species are morphologically very similar, but show small but consistent differences in larval morphology and adult coloration (Seidenbusch, 1996;Boudot & Kalkman, 2015). This has previously led to the suggestion that they should indeed be regarded as distinct species despite BIN sharing and the presence of intermediate phenotypes in regions of sympatric occurrence (Fleck, Grand & Boudot, 2007). Yet, nuclear multilocus data are required to resolve the phylogenetic relationships and the extent of inter-specific gene flow in this species pair.…”

Section: Discussionmentioning

confidence: 99%

Peer Review #3 of "Coverage and quality of DNA barcode references for Central and Northern European Odonata (v0.1)"

Mitchell¹

2021

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Background. Dragonflies and damselflies (Odonata) are important components in biomonitoring due to their amphibiotic lifecycle and specific habitat requirements. They are charismatic and popular insects, but can be challenging to identify despite large size and often distinct coloration, especially the immature stages. DNA-based assessment tools rely on validated DNA barcode reference libraries evaluated in a supraregional context to minimize taxonomic incongruence and identification mismatches.Methods. This study reports on findings from the analysis of the most comprehensive DNA barcode dataset for Central European Odonata to date, with 103 out of 145 recorded European species included and publicly deposited in the Barcode of Life Data System (BOLD). The complete dataset includes 697 specimens (548 adults, 108 larvae) from 274 localities in 16 countries with a geographic emphasis on Central Europe. We used BOLD to generate sequence divergence metrics and to examine the taxonomic composition of the DNA barcode clusters within the dataset and in comparison with all data on BOLD.Results. Over 88% of the species included can be readily identified using their DNA barcodes and the reference dataset provided. Considering the complete European dataset, unambiguous identification is hampered in 12 species due to weak mitochondrial differentiation and partial haplotype sharing. However, considering the known species distributions only two groups of five species possibly co-occur,

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Description of the last stadium larva ofSomatochlora borisi, with comparison to that ofSomatochlora metallica meridionalis(Odonata: Corduliidae)

Abstract: Description of the last stadium larva of Somatochlora borisi, with comparison to that of Somatoch/ora metal/ica meridionalis

Cited by 5 publications

References 5 publications

Italian odonates in the Pandora's box: A comprehensive DNA barcoding inventory shows taxonomic warnings at the Holarctic scale

Italian odonates in the Pandora's box: A comprehensive DNA barcoding inventory shows taxonomic warnings at the Holarctic scale

Coverage and quality of DNA barcode references for Central and Northern European Odonata

Peer Review #3 of "Coverage and quality of DNA barcode references for Central and Northern European Odonata (v0.1)"

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