Assassins’ Creed: Taxonomy and Phylogeny of Reduviidae (Insecta: Hemiptera: Heteroptera)

The family Reduviidae (Hemiptera: Heteroptera), commonly known as assassin bugs, represents one of the most diverse and ecologically significant lineages of predatory insects, encompassing over 7,000 described species worldwide. Despite their diversity and importance in ecological regulation and public health, the taxonomy and phylogeny of Reduviidae remain complex and contentious. This review synthesizes the historical and contemporary developments in reduviid systematics, tracing the transition from classical morphology-based classification to modern integrative and phylogenomic frameworks. Early taxonomic systems, largely based on external morphological characters, provided foundational classifications but were limited by homoplasy, convergent evolution, and cryptic diversity. The advent of molecular systematics, particularly DNA barcoding and multi-gene analyses, improved species delimitation and phylogenetic inference, although challenges such as gene-specific biases and incomplete lineage sorting persisted. Mitogenomic approaches further enhanced phylogenetic resolution by providing genome-scale datasets, revealing conserved structural features alongside lineage-specific variations. Recent advances in phylogenomics, integrating mitochondrial and nuclear genomic data with sophisticated analytical models, have significantly refined higher-level classification and resolved long-standing ambiguities. However, phylogenetic incongruence remains a key challenge, reflecting both biological complexity and methodological limitations. Evolutionary innovations, including predation, venom systems, and the emergence of hematophagy, have played critical roles in the diversification of the family. Integrative taxonomy, combining morphological, molecular, ecological, and behavioral data, is increasingly recognized as essential for achieving a stable and predictive classification. Future research should prioritize expanded genomic resources, advanced analytical frameworks, and interdisciplinary approaches to fully resolve the evolutionary history of Reduviidae.