Broad-Scale Climatic Gradients Drive Multiple Facets of Scorpion Beta Diversity in Northeastern Brazil

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  Broad-Scale Climatic Gradients Drive Multiple Facets of Scorpion Beta Diversity in Northeastern Brazil ABSTRACT Aim Beta diversity analyses clarify mechanisms structuring ecological communities, but their multidimensional facets remain poorly explored in arthropods. Here, we quantified taxonomic, phylogenetic, and functional beta diversity in scorpions, partitioned these facets into species replacement and richness differences, and evaluated the relative importance of spatial structure and environmental conditions in driving community assembly. Location Northeastern Brazil, South America. Taxon Scorpions (Arachnida: Scorpiones). Methods Taxonomic beta diversity was estimated using species presence across 70 sites in northeastern Brazil. Phylogenetic turnover was calculated from a multi-locus molecular tree, and functional beta diversity was derived from morphometric and ecological traits. All beta diversity facets were decomposed into replacement and richness-difference component...

Unveiling the diversity of Eutichurus Simon, 1897 (Araneae: Cheiracanthiidae) in Colombia: new species, records and comments on their distribution

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Unveiling the diversity of Eutichurus Simon, 1897 (Araneae: Cheiracanthiidae) in Colombia: new species, records and comments on their distribution

Abstract

The taxonomic knowledge of Eutichurus Simon, 1897 in Colombia, currently represented by eight species, is increased with the description of six new species: Eutichurus luisdiazi sp. nov. (♂♀), Eutichurus tibacuy sp. nov. (♂♀), Eutichurus meta sp. nov. (♂♀), Eutichurus yariguies sp. nov. (♀), Eutichurus muisca sp. nov (♂), and Eutichurus andresgarcia sp. nov (♂). In addition, new morphological data are provided for Eutichurus arnoi Bonaldo, 1994, whose male is described for the first time. Furthermore, the first accurate locality record for E. cumbia Bonaldo & Ramírez, 2018 in Tabio, Cundinamarca is presented. New records from Colombia are also provided for Eutichurus marquesae Bonaldo, 1994, Eutichurus tropicus (L. Koch, 1866) and Eutichurus valderramai Bonaldo, 1994. We provide an updated taxonomic key and new distribution maps for all the species included in this study, as well as new photographic documentation for several species previously known to occur in Colombia (E. arnoi, E. cumbia, E. putus O. Pickard-Cambridge, 1898, E. tropicus, E. marquesae, and E. valderramai). Additionally, specimens of E. putus, E. sigillatus Chickering, 1937 and E. furcifer, from non-Colombian localities, are photographed here for the first time, accompanied by comments regarding their geographic distribution. With the new species proposed herein, the genus is now represented by 14 species in the country.

Casas, C.M., Villarreal-Blanco, E., Morales, A., Osorio, C. & Martínez, L. (2025) Unveiling the diversity of Eutichurus Simon, 1897 (Araneae: Cheiracanthiidae) in Colombia: new species, records and comments on their distribution. Zootaxa, 5691 (3), 399–448. https://doi.org/10.11646/zootaxa.5691.3.2