Objective.

We offer to the scientific community a review on the taxonomy of the true bugs of the genus Monalonion Herrich-Schaeffer, 1850.

Methodology.

A total of 55 bibliographic resources were reviewed, including 41 scientific papers, eight books, four book chapters, one doctoral thesis and one Online catalog.

Results.

The 16 recognized species for Monalonion, their nomenclatural synonyms and the location of the type material in collections are presented. Monalonion species are recorded for 13 Neotropical countries. With respect to the morphology, figures of the relevant anatomical entities for the study of the genus are included. Host plants include 34 botanical species of 19 families.

Conclusion.

It is essential to update the delimitation of taxa and to design taxonomic tools for the identification of the species; furthermore, it is required to know the interspecific phylogenetic relationships within the genus, the geographical distribution of the species, and their host plants.

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