I Guess We Have All Seen One Of These?

the plastic clip that holds the bag that bread is bought in closed,

photograph creativitches.wordpress.com apparently that are called Occlupanid, and there is a taxonomy of them below,

photograph horg.com here is a brief discretion of them:

class Occlupanida (Occlu=to close, pan= bread) are placed under the Kingdom Microsynthera, of the Phylum Plasticae. Occlupanids share phylum Plasticae with “45” record holders, plastic juice caps, and other often ignored small plastic objects, naturally a synthetic taxonomist had to create a lineage of said Occlupanid and here it is:

diagram horg.com I found all of the above information on the mundane here, but for a fuller look at this fascinating subject have a look here.