The evolution of scarab beetles tracks the sequential rise of angiosperms and mammals

Ahrens, D.; Schwarzer, Julia; Vogler, A. P. (2014). The evolution of scarab beetles tracks the sequential rise of angiosperms and mammals. Proceedings of the Royal Society. Series B - biological sciences, 281(1791), p. 20141470. Royal Society of London 10.1098/rspb.2014.1470

[img] Text
20141470.full.pdf - Published Version
Restricted to registered users only
Available under License Publisher holds Copyright.

Download (837kB) | Request a copy

Extant terrestrial biodiversity arguably is driven by the evolutionary success of angiosperm plants, but the evolutionary mechanisms and timescales of angiosperm-dependent radiations remain poorly understood. The Scarabaeoidea is a diverse lineage of predominantly plant- and dung-feeding beetles. Here, we present a phylogenetic analysis of Scarabaeoidea based on four DNA markers for a taxonomically comprehensive set of specimens and link it to recently described fossil evidence. The phylogeny strongly supports multiple origins of coprophagy, phytophagy and anthophagy. The ingroup-based fossil calibration of the tree widely confirmed a Jurassic origin of the Scarabaeoidea crown group. The crown groups of phytophagous lineages began to radiate first (Pleurostict scarabs: 108 Ma; Glaphyridae between 101 Ma), followed by the later diversification of coprophagous lineages (crown-group age Scarabaeinae: 76 Ma; Aphodiinae: 50 Ma). Pollen feeding arose even later, at maximally 62 Ma in the oldest anthophagous lineage. The clear time lag between the origins of herbivores and coprophages suggests an evolutionary path driven by the angiosperms that first favoured the herbivore fauna (mammals and insects) followed by the secondary radiation of the dung feeders. This finding makes it less likely that extant dung beetle lineages initially fed on dinosaur excrements, as often hypothesized.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)

UniBE Contributor:

Schwarzer, Julia

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

0962-8452

Publisher:

Royal Society of London

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

20 Jul 2015 15:32

Last Modified:

08 Sep 2015 09:57

Publisher DOI:

10.1098/rspb.2014.1470

PubMed ID:

25100705

BORIS DOI:

10.7892/boris.70353

URI:

https://boris.unibe.ch/id/eprint/70353

Actions (login required)

Edit item Edit item
Provide Feedback