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The early wasp plucks the flower : Disparate extant diversity of sawfly superfamilies (Hymenoptera: 'Symphyta') may reflect asynchronous switching to angiosperm hosts

Nyman, Tommi ; Onstein, Renske E. ; Silvestro, Daniele ; Wutke, Saskia ; Taeger, Andreas ; Wahlberg, Niklas LU ; Blank, Stephan M. and Malm, Tobias (2019) In Biological Journal of the Linnean Society 128.
Abstract

The insect order Hymenoptera originated during the Permian nearly 300 Mya. Ancestrally herbivorous hymenopteran lineages today make up the paraphyletic suborder 'Symphyta', which encompasses c. 8200 species with very diverse host-plant associations. We use phylogeny-based statistical analyses to explore the drivers of diversity dynamics within the 'Symphyta', with a particular focus on the hypothesis that diversification of herbivorous insects has been driven by the explosive radiation of angiosperms during and after the Cretaceous. Our ancestral-state estimates reveal that the first symphytans fed on gymnosperms, and that shifts onto angiosperms and pteridophytes - and back - have occurred at different time intervals in different... (More)

The insect order Hymenoptera originated during the Permian nearly 300 Mya. Ancestrally herbivorous hymenopteran lineages today make up the paraphyletic suborder 'Symphyta', which encompasses c. 8200 species with very diverse host-plant associations. We use phylogeny-based statistical analyses to explore the drivers of diversity dynamics within the 'Symphyta', with a particular focus on the hypothesis that diversification of herbivorous insects has been driven by the explosive radiation of angiosperms during and after the Cretaceous. Our ancestral-state estimates reveal that the first symphytans fed on gymnosperms, and that shifts onto angiosperms and pteridophytes - and back - have occurred at different time intervals in different groups. Trait-dependent analyses indicate that average net diversification rates do not differ between symphytan lineages feeding on angiosperms, gymnosperms or pteridophytes, but trait-independent models show that the highest diversification rates are found in a few angiosperm-feeding lineages that may have been favoured by the radiations of their host taxa during the Cenozoic. Intriguingly, lineages-through-time plots show signs of an early Cretaceous mass extinction, with a recovery starting first in angiosperm-associated clades. Hence, the oft-invoked assumption of herbivore diversification driven by the rise of flowering plants may overlook a Cretaceous global turnover in insect herbivore communities during the rapid displacement of gymnosperm- and pteridophyte-dominated floras by angiosperms.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
diversification rates, flowering plants, insect-plant interactions, macroevolution, mass extinctions
in
Biological Journal of the Linnean Society
volume
128
pages
19 pages
publisher
Oxford University Press
external identifiers
  • scopus:85070833469
ISSN
0024-4066
DOI
10.1093/biolinnean/blz071
language
English
LU publication?
yes
id
c9d00960-9acc-482d-bd57-1ba0dd09f637
date added to LUP
2019-10-01 16:15:15
date last changed
2020-11-22 06:08:19
@article{c9d00960-9acc-482d-bd57-1ba0dd09f637,
  abstract     = {<p>The insect order Hymenoptera originated during the Permian nearly 300 Mya. Ancestrally herbivorous hymenopteran lineages today make up the paraphyletic suborder 'Symphyta', which encompasses c. 8200 species with very diverse host-plant associations. We use phylogeny-based statistical analyses to explore the drivers of diversity dynamics within the 'Symphyta', with a particular focus on the hypothesis that diversification of herbivorous insects has been driven by the explosive radiation of angiosperms during and after the Cretaceous. Our ancestral-state estimates reveal that the first symphytans fed on gymnosperms, and that shifts onto angiosperms and pteridophytes - and back - have occurred at different time intervals in different groups. Trait-dependent analyses indicate that average net diversification rates do not differ between symphytan lineages feeding on angiosperms, gymnosperms or pteridophytes, but trait-independent models show that the highest diversification rates are found in a few angiosperm-feeding lineages that may have been favoured by the radiations of their host taxa during the Cenozoic. Intriguingly, lineages-through-time plots show signs of an early Cretaceous mass extinction, with a recovery starting first in angiosperm-associated clades. Hence, the oft-invoked assumption of herbivore diversification driven by the rise of flowering plants may overlook a Cretaceous global turnover in insect herbivore communities during the rapid displacement of gymnosperm- and pteridophyte-dominated floras by angiosperms.</p>},
  author       = {Nyman, Tommi and Onstein, Renske E. and Silvestro, Daniele and Wutke, Saskia and Taeger, Andreas and Wahlberg, Niklas and Blank, Stephan M. and Malm, Tobias},
  issn         = {0024-4066},
  language     = {eng},
  month        = {08},
  publisher    = {Oxford University Press},
  series       = {Biological Journal of the Linnean Society},
  title        = {The early wasp plucks the flower : Disparate extant diversity of sawfly superfamilies (Hymenoptera: 'Symphyta') may reflect asynchronous switching to angiosperm hosts},
  url          = {http://dx.doi.org/10.1093/biolinnean/blz071},
  doi          = {10.1093/biolinnean/blz071},
  volume       = {128},
  year         = {2019},
}