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...

Outdoor records of Erigone dentosa on Texel and further records of Steatoda nobilis (Araneae: Linyphiidae, Theridiidae) in the Netherlands

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Outdoor records of Erigone dentosa on Texel and further records of Steatoda nobilis (Araneae: Linyphiidae, Theridiidae) in the Netherlands

Abstract

In July 2024, four males of the North American dwarf spider species Erigone dentosa O. Pickard-Cambridge, 1894 were found on the Texel seashore near the ferry port. Furthermore, new records of the neozoic species Steatoda nobilis (Thorell, 1875) for the Netherlands are presented, including a record far from urban areas from a shed used as a bird observatory in Goedereede.

Lauterbach S (2025), Outdoor records of Erigone dentosa on Texel and further records of Steatoda nobilis (Araneae: Linyphiidae, Theridiidae) in the Netherlands, Heft 70, 54-57; DOI:10.30963/aramit7010