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Loxosceles arizonica - an overview with pics

Discussion in 'Other Spiders & Arachnids' started by NYAN, Nov 28, 2019.

  1. NYAN

    NYAN Arachnoking Active Member

    CA
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    Since there is very little information on the different Loxosceles species, and my last write up about them was appreciated, I figured I would do another.

    The species that will be discussed today is Loxosceles arizonica. This species has been described as being one which is found at both higher elevations in Arizona, as well as being restricted to areas where saguaro cacti are present (Gertsch & Ennik, 1983). This species shares ranges with Loxosceles apachea, sabina, and deserta also. Identifying these as arizonica was done by utilizing range maps and appearance descriptions, which state that sabina and deserta generally lack pattern on the carapace.

    I observed this species in a variety of habitats. I observed them in very moist, riparian habitat as well as drier, rocky habitat. This species was found in similar habitat that I have found other Loxosceles in. They are found most commonly within and underneath wood and cactus parts. They often were found in areas that termites occupy, as well as under the same objects as other spider species. Compared to Loxosceles deserta which seems to exhibit more synanthropic characteristics, this species tends to be found away from human habitation.

    Examples of microhabitat

    2DCDB4CE-91B3-4963-8E75-A4EFB3A66E94.jpeg

    1CA4B9AB-CE37-44C6-A469-607BA00FDC9E.jpeg

    FD10F635-04A5-4CCF-89F0-24A01F5183B7.jpeg

    Additionally, compared to my observations of Loxosceles deserta, I found only what appear to be adult females. I found no evidence of egg sacs either. I believe that females of this genus are more long lasting than other true spiders and may survive several seasons to breed.

    Photos of specimens

    ED1FFE8F-8171-4C9C-889D-81F829DA4261.jpeg

    67F4F30A-3DC7-4606-8893-EB4F85173B99.jpeg

    AC4552B5-AE1E-475A-80B4-72FED10473A3.jpeg
     
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  2. pannaking22

    pannaking22 Arachnoemperor Active Member

    Same sort of habitat here is used by L. devia. They really seem to love the crap people dump out in the brush, but they don't like to live that close to humans. A weird sort of give-take relationship.
     
  3. NYAN

    NYAN Arachnoking Active Member

    CA
    I think that a lot of animals take advantage of the shelter that people’s trashiness provides. Anyway, you should make a little documentation of the species if you get the chance.
     
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  4. Arthroverts

    Arthroverts Arachnoprince Active Member

    Excellent write-up @NYAN. Thank you for continuing to share your knowledge and experience with us.

    I find the most invertebrates under trash where I live. Fallen Joshua Tree branches? Nah. Old mattresses and bricks? You betcha.

    Thanks for sharing,

    Arthroverts
     
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