Journal
SYSTEMATIC BIOLOGY
Volume 67, Issue 6, Pages 1061-1075Publisher
OXFORD UNIV PRESS
DOI: 10.1093/sysbio/syy026
Keywords
Exome capture; cryptic species; phylogeography; species delimitation; squamates; taxonomy
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Funding
- National Science Foundation Post-doctoral Research Fellowship in Biology (NSF) [1519732]
- Australian Research Council (ARC)
- Australian Biological Resources Study (ABRS)
- National Science Foundation
- ARC
- ABRS
- Div Of Biological Infrastructure
- Direct For Biological Sciences [1519732] Funding Source: National Science Foundation
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As we collect range-wide genetic data for morphologically-defined species, we increasingly unearth evidence for cryptic diversity. Delimiting this cryptic diversity is challenging, both because the divergences span a continuum and because the lack of overt morphological differentiation suggests divergence has proceeded heterogeneously. Herein, we address these challenges as we diagnose and describe species in three co-occurring species groups of Australian lizards. By integrating genomic and morphological data with data on hybridization and introgression from contact zones, we explore several approaches-and their relative benefits and weaknesses-for testing the validity of cryptic lineages. More generally, we advocate that genetic delimitations of cryptic diversity must consider whether these lineages are likely to be durable and persistent through evolutionary time.
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