Mitochondrial phylogenomics and historical biogeography of family
Tephritidae (Diptera)
Abstract
The Tephritidae is one of the largest families of Diptera with high
diversity and globally wide distribution, including a range of important
agricultural pests. However, the origin, phylogeny and evolution history
of Tephritidae remain poorly understood. We undertook the first
comprehensive mitogenomic study covering phylogenetic reconstruction,
divergence time estimation and historical biogeography analyses by
analyzing 147 mitochondrial genomes representing three subfamilies,
seven tribes, 11 genera and 82 species. The results recovered all the
three subfamilies, seven tribes and 11 genera as monophyletic group.
Within Dacini subfamily, our phylogeny strongly supported the sister
group relationship of (Zeugodacus + Dacus) + Bactrocera, which further
supported to raise Zeugodacus as generic level of Dacini. On the other
hand, our molecular phylogenetic analyses did not align well with the
currently recognized subgeneric designations within Ceratitis, Dacus and
Zeugodacus. Some subgenera were recovered as polyphyletic or
paraphyletic, implying the incongruence between morphological characters
and mitogenomic data. Neither the taxa within the Ceratitis FARQ complex
nor those within the Bactrocera dorsalis complex could be clearly
distinguished as distinct species corresponding to the morphospecies by
mitochondrial phylogenetic tree. Divergence time estimation and
historical biogeography analyses indicated that the earliest common
ancestor of the Tephritidae, originated in the Palearctic realm at
138.92-71.44 Ma, with the subsequent divergence into Dacinae +
Trypetinae and Tephritinae at 115.19-67.45 Ma equally in the Palearctic
realm. Dacini might have originated in Laurasia rather than Gondwana and
diverged into Bactrocera and Dacus + Zeugodacus at 48.43-28.70 Ma after
India plate docked with Laurasia.