Molecular Phylogenetics of Coleopteran Diversity

The order Coleoptera, encompassing more than 380 000 described species, represents the most speciose radiation of animals. Molecular phylogenetics has transformed our understanding of beetle evolution by analysing DNA and RNA sequence data to reconstruct relationships among suborders, superfamilies and families. Integrative approaches now combine mitochondrial genomes, multiple nuclear loci and anchored hybrid enrichment to generate time-calibrated trees, revealing the timing and pace of diversification. Advances in sequencing technologies and computational methods have resolved long-standing questions about basal splits—such as the relationships among Polyphaga, Adephaga, Archostemata and Myxophaga—and have challenged the validity of traditional supra­family groupings. Phylogenomic frameworks have also illuminated macroevolutionary drivers, including the impact of angiosperm radiation, horizontal gene transfer events and symbiotic partnerships on adaptive radiations. Beyond pure systematics, robust beetle phylogenies inform conservation priorities, pest management strategies and the use of beetles as bioindicators. Fossil calibration integrated with molecular clocks yields estimates for crown-group origins in the Late Carboniferous to Permian, while dense taxon sampling increases confidence in branching patterns across the tree of life.

Research from Nature Portfolio

Recent broad-scale phylogenetic analysis of nearly 400 beetle species using 95 protein-coding nuclear genes has provided one of the most comprehensive time-calibrated trees for Coleoptera. This work confirmed the monophyly of all four suborders and resolved key infraordinal relationships, placing Polyphaga as sister to a clade comprising Adephaga, Archostemata and Myxophaga. Divergence time estimation suggested a crown-group origin around 297 million years ago, with elevated diversification of herbivorous lineages coinciding with the Cretaceous angiosperm radiation.

High-resolution X-ray microscopy of an Eocene amber beetle specimen has corrected a century-old misidentification and demonstrated that purported modern species from Baltic amber belong instead to extinct stem-lineages. This finding rejects the idea of extant tiger beetles persisting since the Eocene and emphasises the importance of accurate fossil assignments for calibrating molecular clocks in beetle phylogenies.

Molecular Phylogenetics of Coleopteran Diversity publication trend

The graph below shows the total number of articles in molecular phylogenetics of coleopteran diversity across all publications each year (not limited to Nature Index journals).

Technical terms

Molecular phylogenetics: The study of evolutionary relationships using molecular sequence data.

Mitochondrial genome (mitogenome): The circular DNA molecule in mitochondria, often used for phylogenetic inference due to its conserved gene content and maternal inheritance.

Anchored hybrid enrichment: A targeted sequencing method capturing hundreds to thousands of conserved loci across taxa for phylogenomic analysis.

Horizontal gene transfer (HGT): The non-vertical movement of genetic material between organisms, which can introduce novel genes and affect evolutionary trajectories.

Fossil calibration: The use of dated fossil specimens to constrain node ages in molecular clock analyses.

Divergence dating: Estimation of the timing of evolutionary splits using molecular data and clock models.

Non-homogeneous model: A phylogenetic substitution model allowing different equilibrium frequencies across branches to account for compositional heterogeneity.

References

1. Symbiosis and horizontal gene transfer promote herbivory in the megadiverse leaf beetles. Current Biology (2025).
2. MicroCT data provide evidence correcting the previous misidentification of an Eocene amber beetle (Coleoptera, Cicindelidae) as an extant species. Scientific Reports (2023).
3. Analysis of the Mitogenomes of Two Helotid Species Provides New Insights into the Phylogenetic Relationship of the Basal Cucujoidea (Insecta: Coleoptera). Biology (2023).
4. Anchored Phylogenomics, Evolution and Systematics of Elateridae: Are All Bioluminescent Elateroidea Derived Click Beetles?. Biology (2021).
5. Family-Level Sampling of Mitochondrial Genomes in Coleoptera: Compositional Heterogeneity and Phylogenetics. Genome Biology and Evolution (2015).