Laggania cambria mouth parts from the Burgess Shale - ROM2013_13551_1


Laggania cambria mouth parts from the Burgess Shale

Specimen diameter 5 cm
    • Attributes
    • Objects
    • Taxonomy
    • KingdomAnimalia
    • PhylumArthropoda
    • ClassDinocarida
    • OrderRadiodonta
    • GenusLaggania
    • SpecificEpithetcambria
Object number: ROMIP61041B-10930
Not on view
DescriptionPreserved flat, this fossil represents the isolated jaw of Laggania. The circular mouth apparatus has 32 teeth arranged in a radiating fashion. When similar fossils of this specimen were first discovered in the early 20th century, they were classified as a new species of floating medusae (jellyfish) called Peytoia nathorsti. However, when complete specimens of Anomalocaris and Laggania were later discovered, it became clear that Peytoia was in fact the jaw of these ancient animals. Finding a complete specimen is extremely rare, as the organic soft tissue decayed, different elements of the body disarticulated - particularly the harder more resilient parts such as the jaws and claws. Dinocarids represent an extinct group of primitive arthropods living in the open ocean waters that existed in the early and Middle Cambrian (520-505 Ma).
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