New insights into the phylogeny of fig pollinators using Bayesian analyses

Area of Science:

• Ecology
• Evolutionary Biology
• Entomology

Background:

• Fig-pollinator mutualism is highly species-specific, with molecular phylogenies offering insights into co-evolution.
• Previous phylogenetic studies of fig pollinators have unresolved relationships, hindering understanding of mutualism history.

Purpose of the Study:

• To resolve phylogenetic uncertainties in fig pollinators.
• To provide a robust phylogeny for re-evaluating character evolution and genus definitions.

Main Methods:

• Phylogenetic analyses using Bayesian methods and maximum parsimony.
• Incorporated a larger COI sequence dataset, including previously published and new sequences from 20 species.

Main Results:

• Consistent topologies across different phylogenetic methods.
• Clarified discrepancies in previous studies, with pollinators splitting into two clades after rooting with Tetrapus.
• Ceratosolen was found to be non-monophyletic, suggesting a re-division into three groups; subgenera were not supported.
• Urostigma pollinators clustered together, but monophyly of Wiebesia, Blastophaga, and Dolichoris was not supported.

Conclusions:

• The study provides a new phylogenetic framework for fig pollinators.
• Recommends re-evaluating character evolution and genus definitions based on the revised phylogeny.
• A revised classification for Ceratosolen is proposed, impacting the understanding of fig-pollinator co-evolution.