Molecular Phylogenetics and Systematics of Aquatic Coleoptera
Summary
Aquatic Coleoptera encompass a diverse assemblage of beetle families adapted to freshwater and riparian habitats worldwide. Molecular phylogenetics has revolutionised our understanding of their evolutionary history by applying DNA sequence data—both mitochondrial and nuclear—to infer relationships that often conflict with morphology-based classifications. Integrative systematics now combines high-throughput sequencing, DNA barcoding and traditional morphology to delimit species, reconstruct biogeographic patterns and clarify higher-level taxonomy. Key advances include the resolution of cryptic species complexes, the realignment of subfamilial and generic concepts with robust phylogenies, and the matching of larval and adult stages via genetic markers. This work has practical implications for conservation prioritisation, water-quality monitoring through bioindicator species and management of invasive taxa. Across lineages such as Hydrophilidae, Elmidae and Dytiscidae, molecular frameworks have uncovered ancient divergences linked to palaeoclimatic events, as well as recent rapid radiations associated with habitat shifts. By uniting morphological, ecological and genomic data, modern systematics of aquatic beetles provides a scalable model for biodiversity assessment and the safeguarding of freshwater ecosystems.
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Molecular Phylogenetics and Systematics of Aquatic Coleoptera publication trend
The graph below shows the total number of articles in molecular phylogenetics and systematics of aquatic coleoptera across all publications each year (not limited to Nature Index journals).
Technical terms
Molecular phylogenetics: Inference of evolutionary relationships among taxa using DNA sequence data.
Systematics: The discipline that classifies organisms and reconstructs their evolutionary history.
DNA barcoding: Identification of species by comparing a standard short DNA region, often mitochondrial COI.
Generalized Mixed Yule Coalescent (GMYC): A model that uses branching rates on ultrametric gene trees to delimit species boundaries.
Bayesian species delimitation: A statistical framework employing Bayesian inference to test hypotheses of species limits from genetic data.
Monophyly: A group of organisms consisting of an ancestor and all its descendants, forming a single clade.
References
- Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). ZooKeys (2016).
- The Acidocerinae (Coleoptera, Hydrophilidae): taxonomy, classification, and catalog of species. ZooKeys (2021).
- High diversity of Cetiocyon beetles (Coleoptera: Hydrophilidae) along an elevational gradient on Mt. Wilhelm, New Guinea, with new records from the Bird's Head Peninsula. Arthropod Systematics & Phylogeny (2018).
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