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

Posted by
  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...

The genome sequence of an orb-weaver spider, Araneus angulatus Clerck, 1757 (Araneae: Araneidae)

Posted by

 


The genome sequence of an orb-weaver spider, Araneus angulatus Clerck, 1757 (Araneae: Araneidae)

Abstract

We present a genome assembly from an individual female Araneus angulatus (orb-weaver spider; Arthropoda; Arachnida; Araneae; Araneidae). The assembly contains two haplotypes with total lengths of 2 980.91 megabases and 2 941.08 megabases. Most of haplotype 1 (94.74%) is scaffolded into 28 chromosomal pseudomolecules. Haplotype 2 was assembled to scaffold level. The mitochondrial genome has also been assembled, with a length of 14.53 kilobases. This assembly was generated as part of the Darwin Tree of Life project, which produces reference genomes for eukaryotic species found in Britain and Ireland.


Raper CM, Sivell O, Natural History Museum Genome Acquisition Lab et al. The genome sequence of an orb-weaver spider, Araneus angulatus Clerck, 1757 (Araneae: Araneidae) [version 1; peer review: awaiting peer review]. Wellcome Open Res 2025, 10:656 (https://doi.org/10.12688/wellcomeopenres.25196.1)