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Solifugae of Canada
expand article infoPaula E. Cushing, Jack O. Brookhart
‡ Denver Museum of Nature & Science, Denver, United States of America
Open Access

Abstract

The Solfugae fauna of Canada includes three known species: Eremobates docolora Brookhart and Muma, E. scaber (Kraepelin), and Hemerotrecha denticulata Muma. It is expected that as many as four additional species may be found in Canada. Only one Barcode Index Number is currently known from Canadian specimens.

Keywords

biodiversity assessment, Biota of Canada, camel spiders, solifugids

The arachnid order Solifugae, commonly known as camel spiders, wind scorpions, or sun spiders, is a relatively small order with over 1100 described species, about 200 of which occur in North America (Harvey 2003, Brookhart and Brookhart 2006, Cushing et al. 2015). The order has been documented from the western Canadian provinces ranging from southwestern Saskatchewan to southern British Columbia. This corresponds generally to the Canadian Prairies and Western Interior Basin ecozones. Currently three species, Eremobates docolora Brookhart and Muma from Alberta and Saskatchewan, and E. scaber (Kraepelin) and Hemerotrecha denticulata Muma from British Columbia, have been recorded from Canada, all in the family Eremobatidae (Dondale 1979, Holmberg and Buckle 1992, Brookhart and Brookhart 2006) (Table 1). Dondale (1979) reported E. gladiolus Muma and Holmberg and Buckle (1982) added E. pallipes (Say), E. scaber (Kraepelin) and the genera Eremochelis and Hemerotrecha from Canada. Subsequently, E. gladiolus was synonymized with E. scaber by Brookhart and Cushing (2004), and Holmberg and Buckle (1992) determined that their report of E. pallipes and Eremochelis was based on misidentification.

Census of Solifugae in Canada.

Taxon No. species reported in Dondale (1979) No. species currently known from Canada1 No. BINs1 available for Canadian species Est. no. undescribed or unrecorded species in Canada General distribution by ecozone2 Information sources
Eremobatidae 1 3 1 4 Western Interior Basin, Prairies Dondale 1979, Holmberg and Buckle 1982, 1992, Brookhart and Brookhart 2006

Four undescribed species, two Eremobates and two Hemerotrecha, have been proposed from Canada (Holmberg and Buckle 1992), although these have not been formally described. These were collected from dry grassland habitats in Saskatchewan, Alberta and British Columbia (Brookhart and Brookhart 2006). These records are the basis for the estimate of four additional species remaining to be described from Canada (Table 1).

Presently, there are six specimens in the Barcodes of Life Data (BOLD) System from British Columbia, represented by one Barcode Index Number (BIN) (Table 1). These specimens are identified in BOLD as Eremobates gladiolus, a junior synonym of E. scaber.

The low species diversity of this order of arachnids in Canada can be attributed to the lack of suitable habitats and climatic conditions in these northern latitudes for a group adapted to dry, warm, xeric conditions with open, sandy soils (Punzo 1998). Solifugae are best adapted to desert and semi-desert environments and are not well adapted to cold or temperate regions (Cloudsley-Thompson 1977), although at least one species, Uspallata pulchra Mello-Leitão, 1938 (Mummuciidae), has been reported from a high elevation site (3670 m) in Chile (Muma 1971). Future work on this order should focus on obtaining DNA barcode data from all taxa including the suspected new species.

Acknowledgments

This manuscript was supported by National Science Foundation Grant # DEB-1754587 awarded to PEC.

References

  • Brookhart JO, Brookhart IP (2006) An annotated checklist of continental North American Solifugae with type depositories, abundance, and notes on their zoogeography. Journal of Arachnology 34(2): 299–330. https://doi.org/10.1636/H04-02.1
  • Brookhart JO, Cushing PE (2004) The systematics of the Eremobates scaber species-group (Solifugae, Eremobatidae). Journal of Arachnology 32: 284–312. https://doi.org/10.1636/H03-12
  • Cushing PE, Graham MR, Prendini L, Brookhart JO (2015) A multilocus molecular phylogeny of the endemic North American camel spider family Eremobatidae (Arachnida: Solifugae). Molecular Phylogenetics and Evolution 92(2015): 280–293. https://doi.org/10.1016/j.ympev.2015.07.001
  • Dondale CD (1979) Opiliones, Pseudoscorpiionida, Scorpionida, Solifugae. In: Danks HV (Ed.) Canada and its insect fauna. Memoirs of the Entomological Society of Canada No. 108, 250–251. https://doi.org/10.4039/entm111108250-1
  • Harvey MS (2003) Catalogue of the Smaller Arachnid Orders of the World: Amblypygi, Uropygi, Schizomida, Palpigradi, Ricinulei and Solifugae. CSIRO Publishing, Collingwood, Victoria, 385 pp.
  • Holmberg RG, Buckle DJ (1982) Preliminary report on the sun-spiders (Arachnida, Solpugida) of Canada. Proceedings of the Thirtieth Annual Meeting of the Entomological Society of Alberta, 13.
  • Holmberg RG, Buckle DJ (1992) Solpugida of Canada. Proceedings of the 38th Annual Meeting of the Entomological Society of Alberta, 11.
  • Langor DW (2019) The diversity of terrestrial arthropods in Canada. In: Langor DW, Sheffield CS (Eds) The Biota of Canada – A Biodiversity Assessment. Part 1: The Terrestrial Arthropods. ZooKeys 819: 9–40. https://doi.org/10.3897/zookeys.819.31947
  • Muma MH (1971) The solpugids (Arachnida, Solpugida) of Chile, with descriptions of a new family, new genera, and new species. American Museum Novitates 2476: 1–23. http://hdl.handle.net/2246/2684