How to fail at species delimitation.
Reads0
Chats0
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
Citations
More filters
Journal ArticleDOI
Integrative taxonomy reveals an even greater diversity within the speciose genus Phyllodistomum (Platyhelminthes : Trematoda : Gorgoderidae), parasitic in the urinary bladder of Middle American freshwater fishes, with descriptions of five new species
Carlos Daniel Pinacho-Pinacho,Ana L. Sereno-Uribe,Jesús S. Hernández-Orts,Martín García-Varela,Gerardo Pérez-Ponce de León +4 more
TL;DR: In this paper, DNA sequences (28S rRNA and COI mtDNA) were obtained from individuals of Phyllodistomum sampled in 29 locations across Middle America, and used in combination with morphology, host association and geographic distribution to uncover five new congeneric species.
Journal ArticleDOI
Multiple species delimitation approaches with COI barcodes poorly fit each other and morphospecies – An integrative taxonomy case of Sri Lankan Sericini chafers (Coleoptera: Scarabaeidae)
Uda Gedara Sasanka Lakmali Ranasinghe,Jonas Eberle,Jana Thormann,Claudia Bohacz,Suresh P. Benjamin,Dirk Ahrens +5 more
TL;DR: It is confirmed that COI barcode data alone are unlikely to correctly delimit all species, in particular, when using only a single delimitation approach, and encouraged the integration of various approaches and data, particularly morphology, to validate species boundaries.
Journal ArticleDOI
Cryptic Diversity in the Monotypic Neotropical Micromoth Genus Angelabella (Lepidoptera: Gracillariidae) in the Peru-Chile Desert.
Marcelo Vargas-Ortiz,Guido Aliaga-Pichihua,Ana Lazo-Rivera,José Cerdeña,Jackie Farfán,Wilson Huanca-Mamani,Héctor A. Vargas +6 more
TL;DR: It is suggested that Angelabella is not a monotypic genus, but harbors at least four morphologically cryptic allopatric species with restricted geographic ranges, including the type species and three candidate species.
References
More filters
Book
Model Selection and Multimodel Inference: A Practical Information-Theoretic Approach
TL;DR: The second edition of this book is unique in that it focuses on methods for making formal statistical inference from all the models in an a priori set (Multi-Model Inference).
Journal ArticleDOI
Inference of population structure using multilocus genotype data
TL;DR: Pritch et al. as discussed by the authors proposed a model-based clustering method for using multilocus genotype data to infer population structure and assign individuals to populations, which can be applied to most of the commonly used genetic markers, provided that they are not closely linked.
Book
On the Origin of Species by Means of Natural Selection, or, The Preservation of Favoured Races in the Struggle for Life
TL;DR: The "Penguin Classics" edition of "On the Origin of Species" as discussed by the authors contains an introduction and notes by William Bynum, and features a cover designed by Damien Hirst.
Book
Phylogeography: The History and Formation of Species
TL;DR: This chapter discusses the history and Purview of Phylogeography, Genealogical Concordance, and Speciation Processes and Extended Genealogy Works and its applications to Speciation and Beyond.
Journal ArticleDOI
The Origin of Species by means of Natural Selection; or the Preservation of Favoured Races in the Struggle for Life
TL;DR: A man is unworthy of the name of a man of science who, whatever may be his special branch of study, has not materially altered his views on some important points within the last twelve years.