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...

New data on the spiders (Arachnida: Araneae) of Anguilla, Lesser Antilles with description of seven new species

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New data on the spiders (Arachnida: Araneae) of Anguilla, Lesser Antilles with description of seven new species

Abstract 

28 species of spider are newly recorded from Anguilla, a United Kingdom Overseas Territory, in the Lesser Antilles, including seven also new to science: Agyneta anguilla Sherwood, Mukhida & Connor sp. nov. (Linyphiidae), Sphecozone sandyground Sherwood, Mukhida & Connor sp. nov. (Linyphiidae), Mimetus antillensis Sherwood, Mukhida & Connor sp. nov. (Mimetidae), Modisimus anguillensis Sherwood, Mukhida & Connor sp. nov. (Pholcidae), Anelosimus blackgardens Sherwood, Mukhida & Connor sp. nov. (Theridiidae), Anelosimus covepond Sherwood, Mukhida & Connor sp. nov. (Theridiidae), and Coleosoma roadsalt Sherwood, Mukhida & Connor sp. nov. (Theridiidae). The remaining 18 species representing new faunistic records are: Hibana tenuis (L. Koch, 1866) (Anyphaenidae), Alpaida dominica Levi, 1988 (Araneidae), Eriophora ravilla (C. L. Koch, 1844) (Araneidae), Gea heptagon (Hentz, 1850) (Araneidae), Neoscona oaxacensis (Keyserling, 1864) (Araneidae), Cheiracanthium inclusum (Hentz, 1847) (Cheiracanthiidae), Hogna cf. sanctivincenti (Simon, 1898) (Lycosidae), Pardosa portoricensis Banks, 1901 (Lycosidae), Prolycosides aussereri (Keyserling, 1877) (Lycosidae), Ischnothyreus peltifer (Simon, 1892) (Oonopidae), Peucetia viridis (Blackwall, 1858) (Oxyopidae), Micropholcus fauroti (Simon, 1887) (Pholcidae), Hentzia antillana Bryant, 1940 (Salticidae), Scytodes sp. (Scytodidae), Nolavia antiguensis (Keyserling, 1880) (Sparassidae), Tetragnatha guatemalensis O. Pickard-Cambridge, 1889 (Tetragnathidae), Coleosoma acutiventer (Keyserling, 1884) (Theridiidae), Coleosoma floridanum Banks, 1900 (Theridiidae), Latrodectus geometricus C. L. Koch, 1841 (Theridiidae), Tmarus cf. vertumus Chickering, 1966 (Thomisidae), and Zosis geniculata (Olivier, 1789) (Uloboridae). The families Anyphaenidae Bertkau, 1878, Mimetidae Simon, 1881, Oonopidae Simon, 1892, and Uloboridae Thorell, 1869 are thereby recorded for the first time from Anguilla.

Sherwood D., Mukhida F., Connor R.A., Hughes G., Carter D., Curtis I., Hochart J., Gumbs K., Gumbs J.C., Buckmire Z., Morrishaw Z., Child N. & Bosquet I.V., 2026. – Nouvelles données sur les araignées (Arachnida : Araneae) d'Anguilla, Petites Antilles, avec la description de sept nouvelles espèces. Faunitaxys, 14(22): 1 – 30. https://doi.org/10.57800/faunitaxys-14(22) - https://zoobank.org/867EB085-1F88-405D-BB61-8F7E9523A4A0