The leaf-miner flies (Diptera: Agromyzidae) of Costa Rican cloud forests

Area of Science:

• Entomology
• Ecology
• Biodiversity Studies

Background:

• Cloud forests are vital biodiversity hotspots and centers of endemic species.
• These ecosystems are among the most threatened tropical environments globally.
• Leaf-miner flies (Diptera: Agromyzidae) are important indicators of ecosystem health.

Purpose of the Study:

• To inventory and identify leaf-miner flies in Costa Rican cloud forests.
• To assess the species richness and diversity of Agromyzidae in this understudied habitat.
• To contribute to the understanding of Agromyzidae distribution in the Neotropics.

Main Methods:

• Conducted a year-long survey of Agromyzidae at three cloud forest sites in Costa Rica.
• Collected 976 specimens using Malaise traps, primarily near forest edges.
• Identified species and morphospecies, including new genera and species for Costa Rica and the Neotropics.

Main Results:

• Identified 158 species (or morphospecies) of Agromyzidae, significantly expanding the known diversity in Costa Rica (previously 65 species).
• Discovered one new genus (Haplopeodes) and one genus (Metopomyza) previously unreported from the Neotropics.
• Documented high species richness, with 12 of 14 known Neotropical genera and notable diversity within the Phytoliriomyza genus.

Conclusions:

• Costa Rican cloud forests are crucial reservoirs of Agromyzidae biodiversity, with high species richness and potential endemism.
• The findings underscore the urgent need for conservation of these fragile and threatened ecosystems.
• This inventory significantly advances the knowledge of leaf-miner fly diversity in the Neotropics.