Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae).
The chiefly Holarctic Hydrobius species complex (Coleoptera, Hydrophilidae) currently consists of Hydrobius arcticus Kuwert, 1890, and three morphological variants of Hydrobius fuscipes (Linnaeus, 1758): var. fuscipes, var. rottenbergii and var. subrotundus in northern Europe. Here molecular and mor...
Published in: | ZooKeys |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Enheten för zoologi
2016
|
Subjects: | |
Online Access: | http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2211 https://doi.org/10.3897/zookeys.564.6558 |
id |
ftnrm:oai:DiVA.org:nrm-2211 |
---|---|
record_format |
openpolar |
spelling |
ftnrm:oai:DiVA.org:nrm-2211 2023-05-15T16:12:18+02:00 Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). Fossen, Erlend I Ekrem, Torbjørn Nilsson, Anders N Bergsten, Johannes 2016 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2211 https://doi.org/10.3897/zookeys.564.6558 eng eng Enheten för zoologi ZooKeys, 1313-2989, 2016, 564, http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2211 doi:10.3897/zookeys.564.6558 PMID 27081333 info:eu-repo/semantics/openAccess GMYC species complex BPP guide tree Fennoscandia morphometrics Bayesian genitalia molecular phylogeny species boundaries morphology cryptic species integrative taxonomy DNA barcoding iden- ti cation key taxonomy checklist Biological Systematics Biologisk systematik Article in journal info:eu-repo/semantics/article text 2016 ftnrm https://doi.org/10.3897/zookeys.564.6558 2021-10-08T07:21:14Z The chiefly Holarctic Hydrobius species complex (Coleoptera, Hydrophilidae) currently consists of Hydrobius arcticus Kuwert, 1890, and three morphological variants of Hydrobius fuscipes (Linnaeus, 1758): var. fuscipes, var. rottenbergii and var. subrotundus in northern Europe. Here molecular and morphological data are used to test the species boundaries in this species complex. Three gene segments (COI, H3 and ITS2) were sequenced and analyzed with Bayesian methods to infer phylogenetic relationships. The Generalized Mixed Yule Coalescent (GMYC) model and two versions of the Bayesian species delimitation method BPP, with or without an a priori defined guide tree (v2.2 & v3.0), were used to evaluate species limits. External and male genital characters of primarily Fennoscandian specimens were measured and statistically analyzed to test for significant differences in quantitative morphological characters. The four morphotypes formed separate genetic clusters on gene trees and were delimited as separate species by GMYC and by both versions of BPP, despite specimens of Hydrobius fuscipes var. fuscipes and Hydrobius fuscipes var. subrotundus being sympatric. Hydrobius arcticus and Hydrobius fuscipes var. rottenbergii could only be separated genetically with ITS2, and were delimited statistically with GMYC on ITS2 and with BPP on the combined data. In addition, six or seven potentially cryptic species of the Hydrobius fuscipes complex from regions outside northern Europe were delimited genetically. Although some overlap was found, the mean values of six male genital characters were significantly different between the morphotypes (p < 0.001). Morphological characters previously presumed to be diagnostic were less reliable to separate Hydrobius fuscipes var. fuscipes from Hydrobius fuscipes var. subrotundus, but characters in the literature for Hydrobius arcticus and Hydrobius fuscipes var. rottenbergii were diagnostic. Overall, morphological and molecular evidence strongly suggest that Hydrobius arcticus and the three morphological variants of Hydrobius fuscipes are separate species and Hydrobius rottenbergii Gerhardt, 1872, stat. n. and Hydrobius subrotundus Stephens, 1829, stat. n. are elevated to valid species. An identification key to northern European species of Hydrobius is provided. Article in Journal/Newspaper Fennoscandia Fennoscandian Swedish Museum of Natural History: Publications (DiVA) ZooKeys 564 71 120 |
institution |
Open Polar |
collection |
Swedish Museum of Natural History: Publications (DiVA) |
op_collection_id |
ftnrm |
language |
English |
topic |
GMYC species complex BPP guide tree Fennoscandia morphometrics Bayesian genitalia molecular phylogeny species boundaries morphology cryptic species integrative taxonomy DNA barcoding iden- ti cation key taxonomy checklist Biological Systematics Biologisk systematik |
spellingShingle |
GMYC species complex BPP guide tree Fennoscandia morphometrics Bayesian genitalia molecular phylogeny species boundaries morphology cryptic species integrative taxonomy DNA barcoding iden- ti cation key taxonomy checklist Biological Systematics Biologisk systematik Fossen, Erlend I Ekrem, Torbjørn Nilsson, Anders N Bergsten, Johannes Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). |
topic_facet |
GMYC species complex BPP guide tree Fennoscandia morphometrics Bayesian genitalia molecular phylogeny species boundaries morphology cryptic species integrative taxonomy DNA barcoding iden- ti cation key taxonomy checklist Biological Systematics Biologisk systematik |
description |
The chiefly Holarctic Hydrobius species complex (Coleoptera, Hydrophilidae) currently consists of Hydrobius arcticus Kuwert, 1890, and three morphological variants of Hydrobius fuscipes (Linnaeus, 1758): var. fuscipes, var. rottenbergii and var. subrotundus in northern Europe. Here molecular and morphological data are used to test the species boundaries in this species complex. Three gene segments (COI, H3 and ITS2) were sequenced and analyzed with Bayesian methods to infer phylogenetic relationships. The Generalized Mixed Yule Coalescent (GMYC) model and two versions of the Bayesian species delimitation method BPP, with or without an a priori defined guide tree (v2.2 & v3.0), were used to evaluate species limits. External and male genital characters of primarily Fennoscandian specimens were measured and statistically analyzed to test for significant differences in quantitative morphological characters. The four morphotypes formed separate genetic clusters on gene trees and were delimited as separate species by GMYC and by both versions of BPP, despite specimens of Hydrobius fuscipes var. fuscipes and Hydrobius fuscipes var. subrotundus being sympatric. Hydrobius arcticus and Hydrobius fuscipes var. rottenbergii could only be separated genetically with ITS2, and were delimited statistically with GMYC on ITS2 and with BPP on the combined data. In addition, six or seven potentially cryptic species of the Hydrobius fuscipes complex from regions outside northern Europe were delimited genetically. Although some overlap was found, the mean values of six male genital characters were significantly different between the morphotypes (p < 0.001). Morphological characters previously presumed to be diagnostic were less reliable to separate Hydrobius fuscipes var. fuscipes from Hydrobius fuscipes var. subrotundus, but characters in the literature for Hydrobius arcticus and Hydrobius fuscipes var. rottenbergii were diagnostic. Overall, morphological and molecular evidence strongly suggest that Hydrobius arcticus and the three morphological variants of Hydrobius fuscipes are separate species and Hydrobius rottenbergii Gerhardt, 1872, stat. n. and Hydrobius subrotundus Stephens, 1829, stat. n. are elevated to valid species. An identification key to northern European species of Hydrobius is provided. |
format |
Article in Journal/Newspaper |
author |
Fossen, Erlend I Ekrem, Torbjørn Nilsson, Anders N Bergsten, Johannes |
author_facet |
Fossen, Erlend I Ekrem, Torbjørn Nilsson, Anders N Bergsten, Johannes |
author_sort |
Fossen, Erlend I |
title |
Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). |
title_short |
Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). |
title_full |
Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). |
title_fullStr |
Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). |
title_full_unstemmed |
Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). |
title_sort |
species delimitation in northern european water scavenger beetles of the genus hydrobius (coleoptera, hydrophilidae). |
publisher |
Enheten för zoologi |
publishDate |
2016 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2211 https://doi.org/10.3897/zookeys.564.6558 |
genre |
Fennoscandia Fennoscandian |
genre_facet |
Fennoscandia Fennoscandian |
op_relation |
ZooKeys, 1313-2989, 2016, 564, http://urn.kb.se/resolve?urn=urn:nbn:se:nrm:diva-2211 doi:10.3897/zookeys.564.6558 PMID 27081333 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3897/zookeys.564.6558 |
container_title |
ZooKeys |
container_volume |
564 |
container_start_page |
71 |
op_container_end_page |
120 |
_version_ |
1765997586793103360 |