Redefining Stagonomus Gorski based on morphological and molecular data (Pentatomidae: Eysarcorini)

Area of Science:

• Entomology
• Systematics
• Molecular Phylogenetics

Background:

• The tribe Eysarcorini includes closely related genera like Carbula, Eysarcoris, and Stagonomus.
• Accurate classification is crucial for understanding insect biodiversity and evolution.

Purpose of the Study:

• To reconstruct the phylogenetic relationships within the Eysarcorini tribe.
• To clarify the taxonomic status of certain species and subgenera.
• To redefine the genus Stagonomus based on new data.

Main Methods:

• Phylogenetic analysis using mitochondrial genes: 16S rRNA and cytochrome oxidase subunit I (COI).
• Incorporation of morphological characters, including male genitalia, for taxonomic comparison.
• Comparative analysis of molecular and morphological data.

Main Results:

• The species Eysarcoris gibbosus and Eysarcoris venustissimus are transferred to the genus Stagonomus.
• The subgenus Dalleria is proposed as a synonym under the subgenus Stagonomus.
• The genus Stagonomus is redefined with new diagnostic characters derived from male genitalia.

Conclusions:

• The study provides a revised phylogenetic framework for the Eysarcorini tribe.
• Taxonomic reclassifications enhance the understanding of evolutionary relationships within the group.
• The redefinition of Stagonomus offers clearer diagnostic criteria for species identification.