How to fail at species delimitation.
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TLDR
Researchers should apply a wide range of species delimitation analyses to their data and place their trust in delimitations that are congruent across methods, for in most contexts it is better to fail to delimit species than it is to falsely delimit entities that do not represent actual evolutionary lineages.Abstract:
Species delimitation is the act of identifying species-level biological diversity. In recent years, the field has witnessed a dramatic increase in the number of methods available for delimiting species. However, most recent investigations only utilize a handful (i.e. 2–3) of the available methods, often for unstated reasons. Because the parameter space that is potentially relevant to species delimitation far exceeds the parameterization of any existing method, a given method necessarily makes a number of simplifying assumptions, any one of which could be violated in a particular system. We suggest that researchers should apply a wide range of species delimitation analyses to their data and place their trust in delimitations that are congruent across methods. Incongruence across the results from different methods is evidence of either a difference in the power to detect cryptic lineages across one or more of the approaches used to delimit species and could indicate that assumptions of one or more of the methods have been violated. In either case, the inferences drawn from species delimitation studies should be conservative, for in most contexts it is better to fail to delimit species than it is to falsely delimit entities that do not represent actual evolutionary lineages.read more
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Journal ArticleDOI
Review and guide to a future naming system of African Bemisia tabaci species
Laura M. Boykin,Tonny Kinene,James M. Wainaina,Anders Savill,Susan Seal,Habibu Mugerwa,Sarina Macfadyen,Wee Tek Tay,Paul J. De Barro,Laura Kubatko,Titus Alicai,C.A. Omongo,Fred Tairo,Joseph Ndunguru,Peter Sseruwagi +14 more
TL;DR: Challenges associated with classification and identification within the Bemisia tabaci (Gennadius) species complex are reviewed.
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Do mosses really exhibit so large distribution ranges? Insights from the integrative taxonomic study of the Lewinskya affinis complex (Orthotrichaceae, Bryopsida)
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TL;DR: The faster rate of diversification as compared to intercontinental migration reported here is in sharp contrast with earlier views of bryophyte species with wide ranges and low speciation rates.
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Model-based analyses reveal insular population diversification and cryptic frog species in the Ischnocnema parva complex in the Atlantic forest of Brazil.
Marcelo Gehara,Marcelo Gehara,Adriane Barth,Adriane Barth,Eliana Faria de Oliveira,Marco Antonio Costa,Célio F. B. Haddad,Miguel Vences +7 more
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Geographic variation in the Pine Barrens Treefrog (Hyla andersonii): concordance of genetic, morphometric and acoustic signal data.
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New insights into the genetic diversity of the stone crayfish: taxonomic and conservation implications.
Leona Lovrenčić,Lena Bonassin,Ljudevit Luka Boštjančić,Martina Podnar,Mišel Jelić,Goran Klobučar,Martina Jaklic,Valentina Slavevska-Stamenković,Jelena Hinić,Ivana Maguire +9 more
TL;DR: The results confirmed the existence of high genetic diversity within A. torrentium and confirmed that phylogroups recovered on mitochondrial and nuclear DNA are cryptic subspecies and distinct evolutionary significant units.
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