PDA

View Full Version : Big Taxonomy Confusion Syndrome!



LeilaNami
03-22-2009, 01:03 AM
Okay so my brain is hurting trying to figure out how arachnids are separated into their orders and suborders. I'm trying to find defining characteristics that would help me identify them.
1. Mesothelids
2. True spiders (this I think I got down)
3. Mygals and every thing contained within that

Bastian Drolshagen
03-22-2009, 05:54 AM
hi,
Mesothelae: Dorsal opisthosoma segmented, spinnerets at medial portion of ventral opithosoma. Chelicerae working vertically.

Mygalomorphae: Dorsal opisthosoma not segmented, spinnerets at posterior portion of ventral opisthosoma. Chelicerae working vertically.

Araneomorphae: Chelicerae working horizontally

jsloan
03-22-2009, 11:51 AM
hi,
Mesothelae: Dorsal opisthosoma segmented, spinnerets at medial portion of ventral opithosoma. Chelicerae working vertically.

Mygalomorphae: Dorsal opisthosoma not segmented, spinnerets at posterior portion of ventral opisthosoma. Chelicerae working vertically.

Araneomorphae: Chelicerae working horizontally

Also:

Mesothelae: 2 pairs of book lungs

Mygalomorphae: 2 pairs of book lungs

Araneomorphae: 1 pair of book lungs

LeilaNami
03-22-2009, 11:08 PM
Thanks guys that helps a lot