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Monophyletic blowflies revealed by phylogenomics
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Monophyletic blowflies revealed by phylogenomics
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Journal Article
Monophyletic blowflies revealed by phylogenomics
2021
Overview
Background
Blowflies are ubiquitous insects, often shiny and metallic, and the larvae of many species provide important ecosystem services (e.g., recycling carrion) and are used in forensics and debridement therapy. Yet, the taxon has repeatedly been recovered to be para- or polyphyletic, and the lack of a well-corroborated phylogeny has prevented a robust classification.
Results
We here resolve the relationships between the different blowfly subclades by including all recognized subfamilies in a phylogenomic analysis using 2221 single-copy nuclear protein-coding genes of Diptera. Maximum likelihood (ML), maximum parsimony (MP), and coalescent-based phylogeny reconstructions all support the same relationships for the full data set. Based on this backbone phylogeny, blowflies are redefined as the most inclusive monophylum within the superfamily Oestroidea not containing Mesembrinellidae, Mystacinobiidae, Oestridae, Polleniidae, Sarcophagidae, Tachinidae, and Ulurumyiidae. The constituent subfamilies are re-classified as Ameniinae (including the Helicoboscinae,
syn. nov.
), Bengaliinae, Calliphorinae (including Aphyssurinae,
syn. nov.
, Melanomyinae,
syn. nov.
, and Toxotarsinae,
syn. nov.
), Chrysomyinae, Luciliinae, Phumosiinae, Rhiniinae
stat. rev.
, and Rhinophorinae
stat. rev
. Metallic coloration in the adult is shown to be widespread but does not emerge as the most likely ground plan feature.
Conclusions
Our study provides the first phylogeny of oestroid calyptrates including all blowfly subfamilies. This allows settling a long-lasting controversy in Diptera by redefining blowflies as a well-supported monophylum, and blowfly classification is adjusted accordingly. The archetypical blowfly trait of carrion-feeding maggots most likely evolved twice, and the metallic color may not belong to the blowfly ground plan.
