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Multilocus species delimitation in a complex of morphologically conserved trapdoor spiders (mygalomorphae, antrodiaetidae, aliatypus).
This study investigates species limits in a complex of morphologically conserved trapdoor spiders from California and provides a framework for identifying and defining the cryptic lineage diversity that prevails in many organismal groups.
A combined molecular approach to phylogeny of the jumping spider subfamily dendryphantinae (araneae: salticidae).
Four gene regions were sequenced for 30 species of jumping spiders to investigate their molecular phylogeny and evolution, and a group of elongate-bodied genera are placed as basal among the dendryphantines, and previously proposed relationships of Poultonella, Paraphidippus, and Sassacus vitis are confirmed.
Phylogenomics Resolves a Spider Backbone Phylogeny and Rejects a Prevailing Paradigm for Orb Web Evolution
- J. Bond, Nicole L. Garrison, C. Hamilton, Rebecca L Godwin, M. Hedin, I. Agnarsson
- Medicine, BiologyCurrent Biology
- 4 August 2014
A phylogenomic analysis of spiders including taxa representing all major spider lineages is presented, finding that the orb web either evolved much earlier than previously hypothesized and is ancestral for a majority of spiders or else it has multiple independent origins, as hypothesized by precladistic authors.
Spider phylogenomics: untangling the Spider Tree of Life
Contrary to long held beliefs that the orb web is the crowning achievement of spider evolution, ancestral state reconstructions of web type support a phylogenetically ancient origin of the orbweb, and diversification analyses show that the mostly ground-dwelling, web-less RTA clade diversified faster than orb weavers.
A Reconsideration of the Classification of the Spider Infraorder Mygalomorphae (Arachnida: Araneae) Based on Three Nuclear Genes and Morphology
A reevaluation of mygalomorph phylogeny using the rRNA genes 18S and 28S, the nuclear protein-coding gene EF-1γ, and a morphological character matrix proposes a “road map” for future sampling across the infraorder with the aim of solving many remaining questions that hinder mygalomorphic systematics.
Deep molecular divergence in the absence of morphological and ecological change in the Californian coastal dune endemic trapdoor spider Aptostichus simus
It is suggested that species concepts based on morphological distinctiveness, in spider groups with limited dispersal capabilities, probably underestimate true evolutionary diversity.
Molecular phylogenetics of the spider infraorder Mygalomorphae using nuclear rRNA genes (18S and 28S): conflict and agreement with the current system of classification.
The molecular results presented are consistent with more recent hypotheses of mygalomorph relationship; however, additional work remains before mygalomorphic classification can be formally reassessed with confidence-increased taxonomic sampling and the inclusion of additional character systems are required.
Utility of the nuclear protein-coding gene, elongation factor-1 gamma (EF-1gamma), for spider systematics, emphasizing family level relationships of tarantulas and their kin (Araneae: Mygalomorphae).
- N. Ayoub, Jessica E. Garb, M. Hedin, C. Hayashi
- Biology, MedicineMolecular phylogenetics and evolution
- 1 February 2007
The phylogenetic utility of a new molecular marker, elongation factor-1 gamma (EF-1gamma) for discerning family level relationships in the spider infraorder, Mygalomorphae, is shown and strong support for the traditional split of mygalomorphs into atypoids and non-atypoids is found.
Molecular phylogenetics at the population/species interface in cave spiders of the southern Appalachians (Araneae:Nesticidae:Nesticus).
- M. Hedin
- Biology, MedicineMolecular biology and evolution
- 1 March 1997
This paper focuses on the relationship between population genetic structure and speciation mechanisms in a monophyletic species group of Appalachian cave spiders (Nesticus). Using mtDNA sequence data…
The effects of preservatives and temperatures on arachnid DNA
Results show that RNAlater® and propylene glycol are significantly better than the other preservatives for high quality DNA preservation and that tissue is best stored at –80°C or –20°C.