Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Spider's ancestors-Just curious

  1. Feb 24, 2006 #1
    What did the spider evolve from? Just curious.

    -Dan
     
  2. jcsd
  3. Feb 24, 2006 #2

    jim mcnamara

    User Avatar

    Staff: Mentor

    Spiders are Arthropods - meaning mostly that they they have an exoskeleton. Chelicerata is the group they are in. Their main cousins are horseshoe crabs, scorpions, trilobites.

    All of the Arthropoda evolved from early Cambrian species. Chelicerates have their body parts (head, thorax, abdomen all fused), other arthropods don't. Trilobites dominated the the late Cambrian seas, along with sea scorpions.

    Sea spiders (pycnogonids) are very primitive (meaning unchanged from a beginning ancestor ~500 million YA) and are probably descended directly from the ancestors of all modern terrestrial spiders.
     
  4. Feb 24, 2006 #3

    Phobos

    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    I'm going to stick my neck out here (spider bite!) and offer a couple promising-looking sites I came across from a quick Google search. I haven't read it thoroughly, and I'm no spider expert, so I don't know how reliable they are...

    http://www.earthlife.net/chelicerata/web-evolve.html
    http://www.arachnology.be/pages/Paleontology.html [Broken]
     
    Last edited by a moderator: Apr 22, 2017 at 8:27 AM
  5. Feb 24, 2006 #4
    Thanks all! For the record, I'm phobic and I like to know my enemy... :devil:

    -Dan
     
    Last edited by a moderator: Apr 22, 2017 at 8:27 AM
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Spider's ancestors-Just curious
  1. Spider webs (Replies: 10)

  2. The smell of spiders (Replies: 8)

  3. Anomaly of a spider (Replies: 12)

  4. Ancestor of plant? (Replies: 3)

Loading...