The distribution, spatial clustering, and density of trapdoor spiders in two California coastal dune ecosystems

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  The distribution, spatial clustering, and density of trapdoor spiders in two California coastal dune ecosystems Abstract Coastal dune ecosystems support endemic trapdoor spiders, yet population data for these species are limited. We conducted the first coastal dune trapdoor spider population estimation surveys at Moss Landing State Beach (California) and for Aptostichus stephencolberti Bond 2008 at Sunset State Beach using randomly selected 1m 2 quadrats across ~26,000 m 2 per site. Burrow densities were similar between sites (Sunset: 0.287 burrows/m 2 ; Moss: 0.453 burrows/m 2 ), yielding estimated population sizes of ~35,206 and ~30,959 individuals, respectively. However, spatial analyses revealed contrasting patterns of burrow distribution. At Sunset State Beach, burrow presence was strongly associated with vegetation and occurred closer to plants, despite vegetation being randomly distributed. In contrast, no vegetation–burrow association was detected at Moss Landing, alth...

Description of the female huntsman spider Curicaberis pedregal Rheims (Araneae: Sparassidae) from central Mexico and a new record from Tlaxcala state

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Description of the female huntsman spider Curicaberis pedregal Rheims (Araneae: Sparassidae) from central Mexico and a new record from Tlaxcala state

ABSTRACT

The female of the spider Curicaberis pedregal Rheims, 2015 (Sparassidae) is described for the first time. The description is based on two adult females from the state of Tlaxcala, Mexico. Species corroboration is based on two males of the species, collected together with the females. With these new records, the species is currently known to be distributed in the central Mexican states of Mexico City and Tlaxcala.

Valdez Mondragón, Alejandro. 2025. «Description of the Female Huntsman Spider Curicaberis Pedregal Rheims (Araneae: Sparassidae) from Central Mexico and a New Record from Tlaxcala State». ACTA ZOOLÓGICA MEXICANA (N.S.) 41 (1):1-10. https://doi.org/10.21829/azm.2025.4112741.