Abstract:
:The Hawaiian Drosophilidae contains approximately 1000 species, placed in species groups and subgroups based largely on secondary sexual modifications to wings, forelegs and mouthparts. Members of the spoon tarsus subgroup possess a cup-shaped structure on the foretarsi of males. Eight of the twelve species in this subgroup are found only on the Big Island of Hawaii, suggesting that they have diverged within the past 600,000 years. This rapid diversification has made determining the relationships within this group difficult to infer. We use 13 genes, including nine rapidly evolving nuclear loci, to estimate relationships within the spoon tarsus species, as well as to test the monophyly of this subgroup. A variety of analytical approaches are used, including individual and concatenated analyses, Bayesian estimation of species trees and Bayesian untangling of concordance knots. We find widespread agreement between phylogenetic estimates derived from different methods, although some incongruence is present. Notably, our analyses suggest that the spoon tarsus subgroup, as currently defined, is not monophyletic.
journal_name
Mol Phylogenet Evoljournal_title
Molecular phylogenetics and evolutionauthors
Lapoint RT,Gidaya A,O'Grady PMdoi
10.1016/j.ympev.2010.12.015subject
Has Abstractpub_date
2011-03-01 00:00:00pages
492-501issue
3eissn
1055-7903issn
1095-9513pii
S1055-7903(10)00496-3journal_volume
58pub_type
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