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...

Systematic study of the Ageniellini spider wasp genus Machaerothrix Haupt (Hymenoptera: Pompilidae) from Japan and Southeast Asia

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Systematic study of the Ageniellini spider wasp genus Machaerothrix Haupt (Hymenoptera: Pompilidae) from Japan and Southeast Asia

ABSTRACT

A systematic study of Machaerothrix Haupt from Japan and Southeast Asia was conducted. The description of the genus is revised. The female and male of M. tsushimensis natsumiae subsp. n. from Honshu, Japan, the female of M. malaysiensis sp. n. from Malaysia, the male of M. tsushimensis tsushimensis Yasumatsu from Tsushima Is. Japan, and the female of M. quadridentata (Tsuneki) from the Philippines are described for the first time. The female of M. tsushimensis tsushimensis and the male of M. quadridentata are redescribed. A key to all the known species of the genus is presented. The distribution, nesting and social behaviour of the genus are discussed.

Shimizu, A., Kim, J. K., Handa, H., Otsui, K., Yoshimura, J., & Pitts, J. P. (2026). Systematic study of the Ageniellini spider wasp genus Machaerothrix Haupt (Hymenoptera: Pompilidae) from Japan and Southeast Asia. Journal of Natural History, 60(13–16), 763–790. https://doi.org/10.1080/00222933.2026.2627505