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 Just Accepted

This article has been peer reviewed and accepted for publication. It is in production and has not been edited, so may differ from the final published form.

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

Gonzalo Giribet, Erin McIntyre, Erhard Christian, Luis Espinasa, Rodrigo Ferreira, Oscar Francke, Mark Harvey, Marco Isaia, Lubomir Kovac, Lynn McCutchen, Maysa Souza, Maja Zagmajster


Palpigradi are a poorly understood group of delicate arachnids, 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 subterranean habitats, both endogean (soil) and hypogean (caves), 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.

IS13057  Accepted 01 February 2014
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