Invertebrate Systematics Invertebrate Systematics Society
Systematics, phylogeny and biogeography

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.

TAXONOMY, SYSTEMATICS AND BIOGEOGRAPHY OF SPINOCTENUS, A NEW GENUS OF WANDERING SPIDER FROM COLOMBIA (CTENIDAE)

Nicolas Hazzi , Daniele Polotow , Antonio Brescovit , Ranulfo Gonzáles-Obando , Miguel Simó

Abstract

Among ctenid spiders, ctenines comprise the most diverse group of the subfamily. In this study, a new genus of Cteninae, Spinoctenus, is proposed to include the type species S. yotoco sp. nov. Ten new species are also described: S. escalerete, S. pericos, S. eberhardi, S. spinosus, S. stephaniae, S. nambi, S. florezi, S. tequendama, S. chocoensis and S. flammigerus. Results of the parsimony and Bayesian phylogenetic analyses using morphological and behavioral characters indicate the monophyly of this genus, closely related with Phoneutria and Ctenus. This genus can be distinguished from the remaining Ctenidae by three unambiguous synapomorphies: embolus with folded process, tegulum with median process, and RTA curved internally close to the cymbium. A dispersal-vicariance biogeographical analysis of the genus in the Andean and Chocó regions, indicate the origin of Spinoctenus in the Western and Central Andean Cordilleras. From this region, three events of dispersal occured to the other regions (one to the Chocó and two to Eastern Cordillera), which were subsequently followed by three events of vicariance, suggesting that dispersal and vicariance were equally important in shaping the current distribution patterns of Spinoctenus species. The discovery of this new genus containing a large number of new species in the Andean and Chocó regions highlights the current poor knowledge of the Colombian biodiversity.

IS17022  Accepted 25 June 2017

© CSIRO 2017