Revision of Lutnes Cameron (Hymenoptera: Eupelmidae)

Area of Science:

• Entomology
• Systematic Entomology
• Hymenoptera Taxonomy

Background:

• Argaleostatus Gibson, 1995, a genus of Chalcidoidea wasps, is poorly understood.
• Revision of the Eupelmidae family, specifically the Eupelminae subfamily, is needed.

Purpose of the Study:

• To revise the genus Lutnes Cameron, 1884.
• To clarify the taxonomic status of Argaleostatus and its type species.
• To describe new species within the Lutnes genus.

Main Methods:

• Taxonomic revision based on morphological analysis of female specimens.
• Synonymization of Argaleostatus under Lutnes.
• Nomenclatural transfer of Eupelmus testaceus to Lutnes.
• Macrophotography for species illustration.
• Development of a dichotomous key for species identification.

Main Results:

• Argaleostatus is synonymized under Lutnes (new synonymy).
• The type species of Argaleostatus, Eupelmus testaceus, is transferred to Lutnes (new combination).
• Six species are recognized within Lutnes: L. ornaticornis, L. testaceus, L. biguttatus, and three new species (L. aurantimacula, L. infucatus, L. afrotropicus).
• L. aurantimacula and L. infucatus are described from Ecuador (Neotropical region).
• L. afrotropicus is described from Cameroon (Afrotropical region), representing the first record outside the Neotropical region.
• Males of Lutnes remain unrecognized.

Conclusions:

• The genus Lutnes is redefined with an expanded species-level diversity.
• The geographic distribution of Lutnes is extended to the Afrotropical region.
• Further research is needed to understand the monophyly and phylogenetic relationships of Lutnes.