What decomposers live in the Sonoran Desert

Do worms live there and are centipedes considered decomposers??? Also do snails live there?? Thank you if you can help me :)

Carrion eaters like vultures,ants, and flies take care of some detritus. Dung beetles and other beetle species plus millipedes are detritivores reducing wastes for bacteria to decompose.

Termites collect dead plant material, especially grasses, and herbivore dung that is plant matter.
http://www.saguaro-juniper.com/i_and_i/i…

Talus snails are found on mountain slopes among rock talus slopes. More rain falls at higher elevations on windward mountain slopes.
http://www.pima.gov/cmo/sdcp/species/fsh…

Centipedes are predatory.
http://www.desertmuseum.org/books/nhsd_c…