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Entomological Research Letters

2025 Volume 5 Issue 2
Creative Commons License

Introgression and Reticulate Evolution Must Be Incorporated Explicitly Into Insect Species Histories and Classification


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  1. Department of Introgression and Reticulate Evolution, Faculty of Sciences, Mohammed V University, Rabat, Morocco.
  2. Department of Species Histories and Classification, Faculty of Biosciences, University of Casablanca, Casablanca, Morocco.
Abstract

Genome-scale data have made reticulation increasingly visible in insect systematics, yet the inferential consequences are often compressed into a single bifurcating species tree or treated as secondary discordance. This perspective argues that introgression should be carried explicitly from detection through historical interpretation to classification whenever the evidence warrants it. The central difficulty is not simply detecting gene flow, because incomplete lineage sorting, recombination, substitution-rate heterogeneity, unsampled donor lineages and analytical model choice can generate competing explanations. Nor does evidence of hybridization automatically imply erosion of species boundaries. Drawing on recent insect phylogenomics, this article develops a proposed reticulation-aware classification logic that separates evidence class, historical interpretation, genomic distribution, temporal placement and taxonomic consequence. The framework treats networks as complements to, rather than substitutes for, species trees; distinguishes genome-wide admixture from local genealogical mosaicism; and requires mitochondrial, nuclear, morphological and diagnostic evidence to remain analytically separable. Reticulation therefore becomes an explicit component of species history where supported, but not a default explanation for discordance. The proposed approach is intended to improve transparency in insect classification while preserving uncertainty, alternative histories and cases in which contact or discordance occurs without substantial introgression.


How to cite this article
Vancouver
Hariri Y, Nasser H, Zahra F. Introgression and Reticulate Evolution Must Be Incorporated Explicitly Into Insect Species Histories and Classification. Entomol Res Lett. 2025;5(2):1-11. https://doi.org/10.51847/Ac9fCTn7L2
APA
Hariri, Y., Nasser, H., & Zahra, F. (2025). Introgression and Reticulate Evolution Must Be Incorporated Explicitly Into Insect Species Histories and Classification. Entomological Research Letters, 5(2), 1-11. https://doi.org/10.51847/Ac9fCTn7L2
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