Spatial Scale Modulates the Effect of Habitat Amount on Diversity Patterns of Arachnid Assemblages Across Different Brazilian Ecosystems

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  Spatial Scale Modulates the Effect of Habitat Amount on Diversity Patterns of Arachnid Assemblages Across Different Brazilian Ecosystems ABSTRACT Aim We evaluated how native vegetation cover influences the diversity of arachnid assemblages across multiple spatial scales in major Brazilian ecosystems. Location Brazil (Amazon and Atlantic rainforests, Cerrado savanna and Caatinga dry forest). Taxon Arachnida (Opiliones, Pseudoscorpiones and Scorpiones). Methods We sampled arachnids at 120 sites using active search and litter sifting. Native vegetation cover was quantified at three spatial scales (100, 200 and 300 m buffers) using GIS data. Assemblage structure was assessed using abundance, species richness, and Hill numbers ( q  = 0, 1 and 2). Generalized linear mixed models were used to evaluate responses across taxonomic groups and ecosystems. Results We recorded 3986 individuals from 179 species. Diversity responses to native vegetation cover were taxon-, ecosystem- and scale-de...

Hidden treasures of the Caribbean: two new genera and one new species of Lesser Antillean ischnocoline spiders (Araneae: Theraphosidae)

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Hidden treasures of the Caribbean: two new genera and one new species of Lesser Antillean ischnocoline spiders (Araneae: Theraphosidae)

Abstract
The new genus Caribothele gen. nov. is described to house its type species Caribothele culebrae (Petrunkevitch, 1929) comb. nov., from Puerto Rico, transferred from Holothele Karsch, 1879. Another new genus, Encantarana gen. nov. is described to house Encantarana hamiltoni gen. et sp. nov. based on both sexes, also from Puerto Rico, and is presently monotypic. Four other species misplaced in Holothele Karsch, 1879 are transferred to Caribothele gen. nov., creating the following new combinations: Caribothele denticu-lata (Franganillo, 1930) comb. nov., Caribothele maddeni (Esposito & Agnarsson, 2014) comb. nov., Caribothele shoemakeri (Petrunkevitch, 1926) comb. nov., and Caribothele sulfurensis (Maréchal, 2005) comb. nov.

Acknowledgement

My deepest and most heartfelt gratitude goes to Danni Sherwood for her generosity in sharing this and other forthcoming publications prior to their official release. Her consistent support and willingness to provide early access to such valuable materials are sincerely appreciated and continue to make a meaningful difference in advancing this work.

Sherwood, D., Gabriel, R., Peñaherrera-R., P., Rollard, C., Leguin, E.-A. & Privet, K. 2025: Hidden treasures of the Caribbean: two new genera and one new species of Lesser Antillean ischnocoline spiders (Araneae: Theraphosidae). - Natura Somogyienis 46: 99-116.