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Common name: Lamp Shells
Name derivation: “arm foot”
Number of Orders: 16
Number of Families: 329
Number of Genus: 708
Number of known Species: 1,391
Earliest Fossil Record: Early Cambrian 538 - 521 mya
Habitat: Marine
Size Range: 1 mm to 10 cm
Notes: Five extinct classes not included. Based on Catalogue of Life as of July 2024