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Common name: Mud Dragons
Name derivation: "moving snout"
Number of Orders: 4
Number of Families: 10
Number of Genus: 35
Number of known Species: 344
Earliest Fossil Record: Early Cambrian 537 - 529 mya
Habitat: Marine, Brackish
Size Range: 0.1 mm to 1 mm
Notes: Based on Catalogue of Life as of July 2024