Species conservation profiles of a random sample of world spiders II: Gnaphosidae to Nemesiidae

Abstract

BackgroundThe IUCN Red List of Threatened Species is the most widely used information source on the extinction risk of species. One of the uses of the Red List is to evaluate and monitor the state of biodiversity and a possible approach for this purpose is the Red List Index (RLI). For many taxa, mainly hyperdiverse groups, it is not possible within available resources to assess all known species. In such cases, a random sample of species might be selected for assessment and the results derived from it extrapolated for the entire group - the Sampled Red List Index (SRLI). The current contribution is the second in four papers that will constitute the baseline of a future spider SRLI encompassing 200 species distributed across the world.New informationA sample of 200 species of spiders were randomly selected from the World Spider Catalogue, an updated global database containing all recognised species names for the group. The 200 selected species where divided taxonomically at the family level and the familes were ordered alphabetically. In this publication, we present the conservation profiles of 45 species belonging to the families alphabetically arranged between Gnaphosidae and Nemesiidae, which encompassed Gnaphosidae, Idiopidae, Linyphiidae, Liocranidae, Lycosidae, Micropholcommatidae, Mysmenidae and Nemesiidae.

Species conservation profiles of a random sample of world spiders IV: Scytodidae to Zoropsidae

“…A total of 200 species have been assessed within this project (Seppälä et al 2018a, Seppälä et al 2018b, Seppälä et al 2018c, this work), belonging to 47 of the currently recognised 118 families (Fig. 1; World Spider Catalog 2018).…”

“…The vast majority of spiders assessed to date are therefore either regionally or taxonomically clustered and do not represent the group as a whole. The current contribution is the final in four papers (Seppälä et al 2018a, Seppälä et al 2018b, Seppälä et al 2018c) that constitute the baseline of a future spider SRLI encompassing 200 species distributed across the world. All the assessments will, in the future, be included in the IUCN Red List of Threatened Species (www.redlist.org).…”

Current GBIF occurrence data demonstrates both promise and limitations for potential red listing of spiders

“…The first consists of a random selection of 200 species from the World Spider Catalog (Natural History Museum Bern 2017), a global database of all recognised species names for spiders. These were chosen for another study concerning a baseline spider Sampled Red List Index - SRLI (Seppälä et al 2018a, Seppälä et al 2018b, Seppälä et al 2018c, Seppälä et al 2018d). The SRLI is a methodological approach to quantify global trends towards extinction of speciose taxa (Baillie et al 2008, Lewis and Senior 2011) and these data will contribute to its inception for spiders.…”

Globally distributed occurrences utilised in 200 spider species conservation profiles (Arachnida, Araneae)

“…These data were used previously in assessing the global threat status of spider species worldwide (Seppälä et al 2018a, Seppälä et al 2018b, Seppälä et al 2018c, Seppälä et al 2018d). This will serve as the basis for a future Sampled Red List Index (SRLI) for spiders.…”