Phrurotimpus

Phrurotimpus is a genus of araneomorph spiders first described by R. V. Chamberlin and Wilton Ivie in 1935.[2] Originally added to the Liocranidae,[2] it was moved to the Corinnidae in 2002,[3] then to the Phrurolithidae in 2014.[4] They have red egg sacs that look like flattened discs, often found on the underside of stones.[5]

Phrurotimpus
Phrurotimpus alarius
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Phrurolithidae
Genus: Phrurotimpus
Chamberlin & Ivie, 1935[1]
Type species
P. alarius
(Hentz, 1847)
Species

17, see text

Species

As of April 2019 it contains seventeen species in the United States and Canada:[1]

  • Phrurotimpus abditus Gertsch, 1941 – USA
  • Phrurotimpus alarius (Hentz, 1847) (type) – USA, Canada
  • Phrurotimpus borealis (Emerton, 1911) – North America
  • Phrurotimpus certus Gertsch, 1941 – USA, Canada
  • Phrurotimpus chamberlini Schenkel, 1950 – USA
  • Phrurotimpus dulcineus Gertsch, 1941 – USA, Canada
  • Phrurotimpus illudens Gertsch, 1941 – USA
  • Phrurotimpus mateonus (Chamberlin & Gertsch, 1930) – USA
  • Phrurotimpus minutus (Banks, 1892) – USA
  • Phrurotimpus mormon (Chamberlin & Gertsch, 1930) – USA
    • Phrurotimpus m. xanthus Chamberlin & Ivie, 1935 – USA
  • Phrurotimpus parallelus (Chamberlin, 1921) – USA
  • Phrurotimpus subtropicus Ivie & Barrows, 1935 – USA
  • Phrurotimpus truncatus Chamberlin & Ivie, 1935 – USA
  • Phrurotimpus woodburyi (Chamberlin & Gertsch, 1929) – USA
    • Phrurotimpus w. utanus Chamberlin & Ivie, 1935 – USA
gollark: Your idea of "run the thing backward" is quite obvious to anyone who looks at the problem. There have been many people looking at the problem. So if it worked someone would have proved collatz now.
gollark: <@!714406501346967572> 0.4 offense, but if you could easily prove the Collatz conjecture with relatively simple maths someone already would have,
gollark: I assume the 0/1/infinite solution thing is from something something linear algebra.
gollark: Ah. So the matrix maps the values of all the variables to the outputs of each equation, and the same output can be attained in multiple ways sometimes.
gollark: No, I mean how do you use that to get intuition for number of solutions of some equations.

References
  1. "Gen. Phrurotimpus Chamberlin & Ivie, 1935". World Spider Catalog Version 20.0. Natural History Museum Bern. 2019. doi:10.24436/2. Retrieved 2019-05-22.
  2. Chamberlin, R. V.; Ivie, W. (1935). "Miscellaneous new American spiders". Bulletin of the University of Utah. 26 (4): 1–79.
  3. Bosselaers, J.; Jocqué, R. (2002). "Studies in Corinnidae: cladistic analysis of 38 corinnid and liocranid genera, and transfer of Phrurolithinae". Zoologica Scripta. 31: 265.
  4. Ramírez, M. J. (2014). "The morphology and phylogeny of dionychan spiders (Araneae: Araneomorphae)". Bulletin of the American Museum of Natural History. 390: 343.
  5. "Genus Phrurotimpus". BugGuide. Retrieved 2019-05-22.


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