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...

Two new species of Thrixopelma Schmidt, 1994 from Peru (Araneae: Theraphosidae)

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Two new species of Thrixopelma Schmidt, 1994 from Peru (Araneae: Theraphosidae)

Abstract
Two new species of Thrixopelma Schmidt, 1994 are described from Peru based on historic male specimens: Thrixopelma christineae sp. nov. and Thrixopelma eliseanneae sp. nov., both deposited in the Muséum national d'histoire naturelle, Paris. This work increases the diversity of this genus to ten, and the total number of congeners known from Peru to nine.

I would like to thank Danni Sherwood for forwarding this paper via ResearchGate.