The taxonomy of the Tarentola mauritanica species complex (Gekkota: Phyllodactylidae): Bayesian species delimitation supports six candidate species
The lack of morphological diagnosable characters typical of cryptic species, poses a particular problem to taxonomists. This is especially true when taxa are closely related, sharing considerable amounts of ancestral polymorphism. Phylogenetic studies on the Moorish gecko species-complex, Tarentola mauritanica, uncovered extremely high levels of mtDNA diversity with six identified clades, including one from the Canary Islands identified as T. angustimentalis. Because of the conserved morphology of this species and its paraphyletic status with respect to T. angustimentalis, it was suggested that T. mauritanica is a cryptic species complex. Nevertheless, none of the nuclear loci used were reciprocally monophyletic regarding the mitochondrial lineages due to retention of ancestral polymorphism. In this study, we added three new intron markers to the already available dataset and used additional tools, namely phylogenetic gene trees, species tree and species limits within a Bayesian coalescent framework to confirm the support of the main lineages. Bayesian clustering analysis supports all six mtDNA lineages as independent groups, despite showing signs of ancestral polymorphism or possibly gene flow between the Maghreb/South Iberia and Central Morocco clades. The species tree recovered two major groups; one clustering taxa from Europe and Northern Maghreb and another one encompassing the lineages from Central/Southern Morocco, Central Morocco and Canary Islands, indicating that the ancestor of T. angustimentalis came from the Central/Southern Morocco region. Finally, Bayesian coalescent species delimitation analysis supports all six mitochondrial clades as “unconfirmed candidate species”, pending morphological data to define them.
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Format: | artículo biblioteca |
Language: | English |
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Elsevier
2016-01
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Subjects: | Tarentola mauritanica, Species tree, Bayesian species delimitation, |
Online Access: | http://hdl.handle.net/10261/153350 http://dx.doi.org/10.13039/501100001871 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100001264 |
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dig-ibe-es-10261-1533502018-09-27T07:34:33Z The taxonomy of the Tarentola mauritanica species complex (Gekkota: Phyllodactylidae): Bayesian species delimitation supports six candidate species Rato, Catarina Harris, David James Carranza, Salvador Machado, Luis Perera, Ana Fundação para a Ciência e a Tecnologia (Portugal) European Commission Ministerio de Economía y Competitividad (España) Linnean Society of London Tarentola mauritanica Species tree Bayesian species delimitation The lack of morphological diagnosable characters typical of cryptic species, poses a particular problem to taxonomists. This is especially true when taxa are closely related, sharing considerable amounts of ancestral polymorphism. Phylogenetic studies on the Moorish gecko species-complex, Tarentola mauritanica, uncovered extremely high levels of mtDNA diversity with six identified clades, including one from the Canary Islands identified as T. angustimentalis. Because of the conserved morphology of this species and its paraphyletic status with respect to T. angustimentalis, it was suggested that T. mauritanica is a cryptic species complex. Nevertheless, none of the nuclear loci used were reciprocally monophyletic regarding the mitochondrial lineages due to retention of ancestral polymorphism. In this study, we added three new intron markers to the already available dataset and used additional tools, namely phylogenetic gene trees, species tree and species limits within a Bayesian coalescent framework to confirm the support of the main lineages. Bayesian clustering analysis supports all six mtDNA lineages as independent groups, despite showing signs of ancestral polymorphism or possibly gene flow between the Maghreb/South Iberia and Central Morocco clades. The species tree recovered two major groups; one clustering taxa from Europe and Northern Maghreb and another one encompassing the lineages from Central/Southern Morocco, Central Morocco and Canary Islands, indicating that the ancestor of T. angustimentalis came from the Central/Southern Morocco region. Finally, Bayesian coalescent species delimitation analysis supports all six mitochondrial clades as “unconfirmed candidate species”, pending morphological data to define them. CR is supported by a FCT (Fundação para a Ciência e Tecnologia) postdoctoral fellowship [SFRH/BPD/92343/2013], LM by a FCT doctoral fellowship [SFRH/BD/89820/2012] and AP by the IF FCT contract (IF/01257/2012). DJH is supported by the Project “Genomics and Evolutionary Biology”, both co-financed by North Portugal Regional Operational Programme 2007/2013 (ON.2 – O Novo Norte), under the National Strategic Reference Framework (NSRF), through the European Regional Development Fund (ERDF). SC is supported by CGL2012-36970 from the Ministerio de Economía y Competitividad, Spain (co-funded by FEDER). This worked was funded by the Systematics Research Fund from the Linnean Society of London (to CR), and by the FEDER funds through the Operational Programme for Competitiveness Factors-COMPETE and by National Funds through FCT-Foundation for Science and Technology under the “PTDC/BIA-BEC/105327/2008” and “FCOMP-01-0124-FEDER-008970”. Peer reviewed 2017-07-21T06:32:05Z 2017-07-21T06:32:05Z 2016-01 artículo http://purl.org/coar/resource_type/c_6501 Molecular Phylogenetics and Evolution 94(Part A): 271-278 (2016) 1055-7903 http://hdl.handle.net/10261/153350 10.1016/j.ympev.2015.09.008 http://dx.doi.org/10.13039/501100001871 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100001264 en https://doi.org/10.1016/j.ympev.2015.09.008 Sí none Elsevier |
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Tarentola mauritanica Species tree Bayesian species delimitation Tarentola mauritanica Species tree Bayesian species delimitation Rato, Catarina Harris, David James Carranza, Salvador Machado, Luis Perera, Ana The taxonomy of the Tarentola mauritanica species complex (Gekkota: Phyllodactylidae): Bayesian species delimitation supports six candidate species |
description |
The lack of morphological diagnosable characters typical of cryptic species, poses a particular problem to taxonomists. This is especially true when taxa are closely related, sharing considerable amounts of ancestral polymorphism. Phylogenetic studies on the Moorish gecko species-complex, Tarentola mauritanica, uncovered extremely high levels of mtDNA diversity with six identified clades, including one from the Canary Islands identified as T. angustimentalis. Because of the conserved morphology of this species and its paraphyletic status with respect to T. angustimentalis, it was suggested that T. mauritanica is a cryptic species complex. Nevertheless, none of the nuclear loci used were reciprocally monophyletic regarding the mitochondrial lineages due to retention of ancestral polymorphism. In this study, we added three new intron markers to the already available dataset and used additional tools, namely phylogenetic gene trees, species tree and species limits within a Bayesian coalescent framework to confirm the support of the main lineages. Bayesian clustering analysis supports all six mtDNA lineages as independent groups, despite showing signs of ancestral polymorphism or possibly gene flow between the Maghreb/South Iberia and Central Morocco clades. The species tree recovered two major groups; one clustering taxa from Europe and Northern Maghreb and another one encompassing the lineages from Central/Southern Morocco, Central Morocco and Canary Islands, indicating that the ancestor of T. angustimentalis came from the Central/Southern Morocco region. Finally, Bayesian coalescent species delimitation analysis supports all six mitochondrial clades as “unconfirmed candidate species”, pending morphological data to define them. |
author2 |
Fundação para a Ciência e a Tecnologia (Portugal) |
author_facet |
Fundação para a Ciência e a Tecnologia (Portugal) Rato, Catarina Harris, David James Carranza, Salvador Machado, Luis Perera, Ana |
format |
artículo |
topic_facet |
Tarentola mauritanica Species tree Bayesian species delimitation |
author |
Rato, Catarina Harris, David James Carranza, Salvador Machado, Luis Perera, Ana |
author_sort |
Rato, Catarina |
title |
The taxonomy of the Tarentola mauritanica species complex (Gekkota: Phyllodactylidae): Bayesian species delimitation supports six candidate species |
title_short |
The taxonomy of the Tarentola mauritanica species complex (Gekkota: Phyllodactylidae): Bayesian species delimitation supports six candidate species |
title_full |
The taxonomy of the Tarentola mauritanica species complex (Gekkota: Phyllodactylidae): Bayesian species delimitation supports six candidate species |
title_fullStr |
The taxonomy of the Tarentola mauritanica species complex (Gekkota: Phyllodactylidae): Bayesian species delimitation supports six candidate species |
title_full_unstemmed |
The taxonomy of the Tarentola mauritanica species complex (Gekkota: Phyllodactylidae): Bayesian species delimitation supports six candidate species |
title_sort |
taxonomy of the tarentola mauritanica species complex (gekkota: phyllodactylidae): bayesian species delimitation supports six candidate species |
publisher |
Elsevier |
publishDate |
2016-01 |
url |
http://hdl.handle.net/10261/153350 http://dx.doi.org/10.13039/501100001871 http://dx.doi.org/10.13039/501100000780 http://dx.doi.org/10.13039/501100003329 http://dx.doi.org/10.13039/501100001264 |
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