Speciation, gene flow, and seasonal migration in Catharus thrushes (Aves:Turdidae)

Everson, Kathryn M.; McLaughlin, Jessica F.; Cato, Iris A.; Evans, Maryanne M.; Gastaldi, Angela; Mills, Kendall K.; Shink, Katie G.; Wilbur, Sara M.; Winker, Kevin

doi:10.1016/j.ympev.2019.106564

Cited by 29 publications

(44 citation statements)

References 77 publications

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“…Molecular phylogenetic studies have unanimously demonstrated that the resident (nonmigratory) Catharus species, which have been traditionally called 'nightingale-thrushes,' do not form a monophyletic group (Outlaw et al 2003, Klicka et al 2005, Winker & Pruett 2006, Voelker et al 2013, Everson et al 2019. Therefore, the common name 'nightingalethrush' is appropriately applied to all species in Catharus and continued use of 'thrush' for the migratory species alone perpetuates historical misconceptions about phylogenetic relationships.…”

Section: English Common Namesmentioning

confidence: 99%

“…Following that example, I propose that the common names of the migratory species of Catharus be revised to 'strengthen Halley et al (2017). The ordering of species according to phylogenetic clades (A-C) follows Voelker et al (2013) and Everson et al (2019). Novel proposed names are shown in bold.…”

Section: English Common Namesmentioning

confidence: 99%

“…In phylogenetic analyses, C. guttatus has been reconstructed as the sister species of C. occidentalis, and this pair is more closely related to Ruddy-capped Nightingale-Thrush C. frantzii and Black-billed Nightingale-Thrush C. gracilirostris (also sister species) than to any of the long-distance migratory species (Voelker et al 2013, Everson et al 2019. The common name Hermit Nightingale-Thrush C. guttatus (Pallas) will strengthen the association of these closely related species (Table 2).…”

Section: Cladementioning

confidence: 99%

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The misidentification of Turdus ustulatus Nuttall, and the names of the nightingale-thrushes (Turdidae: Catharus)

Halley

2019

Bulletin of the British Ornithologists’ Club

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An extensive review of Turdus ustulatus Nuttall, 1840, and T. swainsoni Cabanis in Tschudi, 1845, and comparison of John K. Townsend's extant study skins (1835-36) to freshly prepared skins of Catharus ustulatus (Nuttall), C. swainsoni (Cabanis) and C. guttatus (Pallas, 1811), reveals that the original description of T. ustulatus Nuttall, 1840, was most likely based on a single specimen (now lost) of Hermit Thrush C. guttatus (Pallas, 1811). The original description of T. swainsoni Cabanis in Tschudi, 1845, is also not unambiguously identifiable and the type material is untraceable. To resolve and stabilise nomenclature, (1) a petition will be filed with the International Commission of Zoological Nomenclature (ICZN) to set aside Art. 75.3.5 of the Code (ICZN 1999) so that a neotype of T. ustulatus Nuttall, 1840, can be designated; and (2) the name C. swainsoni (Cabanis in Tschudi, 1845) is herein rescued via neotypification. Finally, updated common names are proposed to standardise the English group name of the genus to 'nightingale-thrush' and reduce further confusion with respect to common names that have been applied to multiple taxa. This is the second in a series of papers concerning historical aspects of Catharus taxonomy and nomenclature.

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Section: English Common Namesmentioning

confidence: 99%

Section: English Common Namesmentioning

confidence: 99%

Section: Cladementioning

confidence: 99%

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The misidentification of Turdus ustulatus Nuttall, and the names of the nightingale-thrushes (Turdidae: Catharus)

Halley

2019

Bulletin of the British Ornithologists’ Club

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“…Phylogenetic evidence indicates that the common ancestor of extant Catharus species diverged approximately 5 mya, and the common ancestor of Catharus and H. mustelina diverged ≤ 8 mya (33). Remarkably, migration is homoplastic: C. guttatus, the only short-distance migrant, and the only species in Catharus that remains in temperate North America in winter, is more closely related to three sedentary species than to the long-distance migratory species which it superficially resembles (33)(34)(35)(36).…”

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confidence: 99%

Natural selection and circular pathways to seasonal migration in birds

Halley

2020

Preprint

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The “migratory revolutions” (MR) model is a synthetic theory of bird migration that seeks to explain the full range of the functional phenotype, from sedentary residents of non-seasonal (tropical) habitats to obligate long-distance migrants, as a cumulative evolutionary response to shifting distributions of adult extrinsic mortality across the annual cycle. At macroevolutionary scales, the general model predicts that migration evolves in circular patterns, reframing classic debates about the effects of migration on speciation and extinction rates. Here, I describe and apply the MR model to a well-known system, the passerine genus Catharus (Turdidae), to illustrate its broad implications for reconstructing evolutionary history.

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“…Other scenarios in which good species may not be easily distinguished using genomic markers are those in which speciation may have proceeded in the face of gene flow, as evidenced by historical introgression events observable in reticulate genealogies. Recently studied avian examples include Catharus thrushes across the Americas (Everson et al 2020) and Dendrocincla woodcreepers in Amazonia (Pulido-Santacruz et al 2020). The question of how much gene flow between named species are taxonomists willing to tolerate while maintaining their status as distinct taxonomic entities is not new, yet it remains a challenge even with genomic information and tools to analyze such data.…”

mentioning

confidence: 99%

The genomic revolution and species delimitation in birds (and other organisms): gene flow matters, but what about other evolutionary forces?

Cadena¹,

Zapata²

2020

Preprint

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Given the notion that species are population-level lineages and the availability of genomic data to identify separately evolving populations, researchers usually establish species limits based on gene flow or lack thereof. A strict focus on gene flow as the main –or only– criterion to delimit species involves two main complications in practice. First, approaches often used to apply this criterion to genome-wide data cannot by themselves distinguish species limits from within-species population structure, particularly in allopatric organisms. Second, recognizing as species only those lineages one can identify using such approaches fails to embrace the role of other evolutionary forces (i.e. various forms of selection) in defining evolutionary lineages. Using examples from various groups of birds, we call for the importance of considering evolutionary forces additional to gene flow in species delimitation and explain why genomic approaches commonly used in taxonomic studies may be insufficient by themselves to properly uncover species limits. By considering the processes that structure genotypic and phenotypic variation during speciation, we argue that rigorous analyses of phenotypic variation remain crucial for species delimitation in the genomics era because phenotypes uniquely inform us about the role of selection maintaining the cohesion of evolutionary lineages. Evolutionary theory describing the roles of gene flow, genetic drift and natural selection in the origin and maintenance of species calls for an integration of genomics with phenomics in avian species delimitation.

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Speciation, gene flow, and seasonal migration in Catharus thrushes (Aves:Turdidae)

Cited by 29 publications

References 77 publications

The misidentification of Turdus ustulatus Nuttall, and the names of the nightingale-thrushes (Turdidae: Catharus)

The misidentification of Turdus ustulatus Nuttall, and the names of the nightingale-thrushes (Turdidae: Catharus)

Natural selection and circular pathways to seasonal migration in birds

The genomic revolution and species delimitation in birds (and other organisms): gene flow matters, but what about other evolutionary forces?

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