The origins and dispersal history of the trichaline net-winged beetles in Southeast Asia, Wallacea, New Guinea and Australia

Abstract Trichaline net-winged beetles (Lycidae: Metriorrhynchini) are a diverse group distributed in Australia, Wallacea and Indo-Burma. The phylogenetic relationships of ~120 taxa were recovered by applying maximum likelihood and Bayesian inference using DNA fragments of the cox1, rrnL and nad5 mi...

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Bibliographic Details
Published in:Zoological journal of the Linnean Society 2019-03, Vol.185 (4), p.1079-1094
Main Authors: Bocek, Matej, Bocak, Ladislav
Format: Article
Language:English
Subjects:
Bayesian analysis
Beetles
Coleoptera
Colonization
Cratons
Deoxyribonucleic acid
Dispersal
Dispersion
Divergence
DNA
Genes
Genetic diversity
Genetic variation
Geographical isolation
Identification
Islands
Lycidae
Miocene
Mitochondrial DNA
Nucleic acids
Phylogeny
Probability theory
Range extension
RNA
rRNA
Statistical inference
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Summary:Abstract Trichaline net-winged beetles (Lycidae: Metriorrhynchini) are a diverse group distributed in Australia, Wallacea and Indo-Burma. The phylogenetic relationships of ~120 taxa were recovered by applying maximum likelihood and Bayesian inference using DNA fragments of the cox1, rrnL and nad5 mitochondrial DNA and SSU and LSU ribosomal RNA genes. Divergence times and ancestral ranges were estimated using Bayesian approaches. We identified New Guinea as the ancestral region and estimated the date of dispersal events to continental Australia and Asia. Most Australian trichaline beetles diverged from New Guinean lineages during the Early Miocene to the Middle Miocene, and the fauna east of Lyddeker’s Line was established by range expansion from New Guinea to the Moluccas, further on to the Philippines and then to the Greater Sunda Islands and Indo-Burma. A single species dispersed via the Lesser Sunda Islands to continental Asia. Trichaline beetles never crossed Wallace’s Line between Sulawesi and Borneo. The dispersal westward started 20 Mya, after the first contact between Australian and Asian cratons, and three dispersal events led to the colonization of Sundaland. High genetic diversity and limited morphological diversification were identified in Oriental Diatrichalus and Microtrichalus, which colonized Indo-Burma during the last 5 Myr. Geographical isolation led to the origin of cryptic genetic diversity in Southeast Asia.
ISSN:0024-4082
1096-3642
DOI:10.1093/zoolinnean/zly090