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Razkin O.,University of the Basque Country | Razkin O.,Biodiversity Research Group CIEA Lucio Lascaray | Gomez-Moliner B.J.,University of the Basque Country | Gomez-Moliner B.J.,Biodiversity Research Group CIEA Lucio Lascaray | And 8 more authors.
Molecular Phylogenetics and Evolution | Year: 2015

The Helicoidea is one of the most diverse superfamilies of terrestrial land snails. In this study we present a molecular phylogeny of the western Palaearctic Helicoidea obtained by means of neighbor joining, maximum likelihood and Bayesian analysis of the mitochondrial 16S rRNA gene fragment and the nuclear rRNA gene cluster including the 3' end of the 5.8S gene, the complete ITS2 region and 5' end of the large subunit 28S. Most of the morphologically-defined families were confirmed. We propose a revised phylogenetic classification so that families, subfamilies and tribes are monophyletic. The family Hygromiidae sensu Hausdorf and Bouchet (2005) is divided into three clades which are here given familial rank: Canariellidae and Geomitridae, which are recognized for the first time at familial rank, and Hygromiidae s.str. (including Ciliella and Trochulus) that is here restricted. The subfamilies Ciliellinae, Geomitrinae, Hygromiinae, Monachainae and Trochulinae recognized in current classifications were not recovered as monophyletic groups. The family Cochlicellidae is here given tribe rank (Cochlicellini) belonging to the Geomitridae. We describe a new tribe, Plentuisini. Three subfamilies are recognized within Helicidae: Ariantinae, Helicinae (including Theba) and Murellinae. New classification indicates that free right ommatophore retractor muscle arose only once within Geomitridae. The anatomy of the auxiliary copulatory organs of the reproductive system of families, subfamilies and tribes is highlighted. We estimate the origin of the Helicoidea at the end of the Early Cretaceous and its families as Late-Cretaceous to Paleogene. Western Palaearctic Helicoidea belongs to two different lineages that diverged around 86. Ma ago, both starting their diversification at the end of the Cretaceous (around 73-76. Ma). Radiation of some western Helicoidean families started during the Eocene. © 2014 Elsevier Inc. Source


Gomez-Moliner B.J.,University of the Basque Country | Gomez-Moliner B.J.,Biodiversity Research Group CIEA Lucio Lascaray | Elejalde A.M.,University of the Basque Country | Elejalde A.M.,Biodiversity Research Group CIEA Lucio Lascaray | And 6 more authors.
Zoologica Scripta | Year: 2013

In this study, we present a molecular phylogeny of the Trissexodontidae and Helicodontidae obtained by means of Maximum Parsimony, Neighbor Joining, Maximum Likelihood and Bayesian analyses of DNA sequences. Nearly 3KB of sequence data of two mitochondrial genes (COI, 16S rDNA) and the nuclear rRNA gene cluster including ITS-1, the 3′end of the 5.8S gene, the complete ITS-2 region and 5′ end of the large subunit 28S were used to reconstruct the phylogeny of these two families. Monophyly of Trissexodontidae and Helicodontidae at the family level is well supported. A new classification of the genera in the Trissexodontidae is proposed. It includes two subfamilies: Gittenbergeriinae (monotypic for Gittenbergeria turriplana) and Trissexodontinae. The latter includes three strongly supported tribes: (i) Trissexodontini, including Mastigophallus, Trissexodon, Oestophorella and Suboestophora; (ii) Oestophorini, with Oestophora; and (iii) Caracollinini, with Caracollina, Gasulliella, Gasullia and Hatumia. The polytypic Oestophora and Suboestophora are recovered as two monophyletic genera. The anatomy of the auxiliary copulatory organs of the reproductive system is coherent with the new taxonomic interpretation of the Trissexodontidae. Further work, including some more taxa is needed to delimitate subfamilies within Helicodontidae. Finally, the addition of some sequences of other Helicoidea shows that the genus Ciliella is not closely related to Trissexodontidae, being grouped within the Hygromiidae, instead. © 2012 The Authors Zoologica Scripta © 2012 The Norwegian Academy of Science and Letters. Source


Chueca L.J.,University of the Basque Country | Chueca L.J.,Biodiversity Research Group CIEA Lucio Lascaray | Madeira M.J.,University of the Basque Country | Madeira M.J.,Biodiversity Research Group CIEA Lucio Lascaray | And 2 more authors.
Journal of Biogeography | Year: 2015

Aim: We infer the evolutionary history of the land snail genus Allognathus from a molecular phylogeny. An approximate temporal framework for its colonization of the Balearic Islands and diversification within the archipelago is provided according to palaeogeographical events in the western Mediterranean Basin. Location: The Balearic Islands, Western Mediterranean. Methods: A 2461-bp DNA sequence dataset was generated from one nuclear and two mitochondrial gene fragments in 87 specimens, covering all nominal taxa of the genus Allognathus. Through maximum-likelihood and Bayesian phylogenetic methods along with a Bayesian molecular clock, we examined the evolutionary history of the group. Ancestral distribution ranges were estimated for divergence events across the tree using a Bayesian approach. We also used genetic species-delimitation models to determine the taxonomy of Allognathus. Results: We provided the first molecular phylogeny of Allognathus, a genus endemic to the Balearic Islands. The origin of the genus in the Balearic Islands was dated to the middle Miocene based on palaeogeographical events in the Western Mediterranean. During the late Miocene and Pliocene, several diversification events occurred within the archipelago. The ancestral range of Allognathus was reconstructed as the north-eastern Tramuntana Mountains of Mallorca. Main conclusions: Three species were delimited within the genus, one of which has at least five subspecies. The phylogenetic reconstruction showed a high degree of parallelism between the divergence of the main Allognathus lineages and the palaeogeography of the Balearic Islands. The genus appears to have colonized Mallorca from the south-east of the Iberian Peninsula during the middle Miocene. Sea level fluctuations that took place in the Western Mediterranean from the Messinian to the present are consistent with the diversification and secondary contacts of the phylogroups of Allognathus, as well as their distribution ranges. The middle Miocene could have been a period for the colonization of the Balearic Islands by other terrestrial organisms. © 2015 John Wiley & Sons Ltd. Source


Razkin O.,University of the Basque Country | Razkin O.,Biodiversity Research Group CIEA Lucio Lascaray | Sonet G.,Royal Belgian Institute Of Natural Sciences | Breugelmans K.,Royal Belgian Institute Of Natural Sciences | And 6 more authors.
Molecular Phylogenetics and Evolution | Year: 2016

Restriction site-associated DNA sequencing (RADseq) was used to jointly assess phylogenetic relationships, interspecific hybridization and species delimitation in the cryptic, non-model land snail complex Pyramidula. A robust phylogeny was inferred using a matrix of concatenated sequences of almost 1,500,000 bp long, containing >97,000 polymorphic sites. Maximum likelihood analyses fully resolved the phylogenetic relationships among species and drastically improved phylogenetic trees obtained from mtDNA and nDNA gene trees (COI, 16S rRNA, 5.8S rRNA, ITS2 and 28S rRNA sequence data). The best species delimitation scenario was selected on the basis of 875 unlinked single nucleotide polymorphisms, showing that nine Pyramidula species should be distinguished in Europe. Applying D-statistics provided no or weak evidence of interspecific hybridization among Pyramidula, except for some evidence of gene flow between two species. © 2016 Elsevier Inc. Source

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