Palpigradi are a poorly understood group of delicate arthropods, often found in caves or other subterranean habitats. Concomitantly, they have been neglected from a phylogenetic point of view. Here we present the first molecular phylogeny of palpigrades based on specimens collected in different environments (caves and soil) from Australia, Africa, Europe, South America and North America. Analyses of two nuclear ribosomal genes and COI under an array of methods and homology schemes found monophyly of Palpigradi, Eukoeneniidae, and a division of Eukoeneniidae into four main clades, three of which include samples from multiple continents. This supports either ancient vicariance or long-range dispersal, two alternatives we cannot distinguish with the data at hand. In addition, we show that our results are robust to homology scheme and analytical method, encouraging further use of the markers employed in this study to continue drawing a broader picture of palpigrade relationships.

The first phylogenetic analysis of Palpigradi (Arachnida)—the most enigmatic arthropod order

ISAIA, MARCO;
2014-01-01

Abstract

Palpigradi are a poorly understood group of delicate arthropods, often found in caves or other subterranean habitats. Concomitantly, they have been neglected from a phylogenetic point of view. Here we present the first molecular phylogeny of palpigrades based on specimens collected in different environments (caves and soil) from Australia, Africa, Europe, South America and North America. Analyses of two nuclear ribosomal genes and COI under an array of methods and homology schemes found monophyly of Palpigradi, Eukoeneniidae, and a division of Eukoeneniidae into four main clades, three of which include samples from multiple continents. This supports either ancient vicariance or long-range dispersal, two alternatives we cannot distinguish with the data at hand. In addition, we show that our results are robust to homology scheme and analytical method, encouraging further use of the markers employed in this study to continue drawing a broader picture of palpigrade relationships.
2014
28
4
350
360
http://www.publish.csiro.au/nid/120.htm
Arachnida; micro-whip scorpions; speleobiology
Gonzalo Giribet; Erin McIntyre; Erhard Christian; Luis Espinasa; Rodrigo L. Ferreira; Óscar F. Francke; Mark S. Harvey; Marco Isaia; L’ubomīr Kováč; L...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/149676
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