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Anomalocaris ("unlike other shrimp", or "abnormal shrimp") is an extinct genus of radiodont, an order of early-diverging stem-group marine arthropods.. It is best known from the type species A. canadensis, found in the Stephen Formation (particularly the Burgess Shale) of British Columbia, Canada.
Anomalocaris canadensis was also relatively large, estimated up to 34.2–37.8 cm (13.5–14.9 in) long, [7] and the Cambrian hurdiid Titanokorys approached around 50 cm (20 in) long. [16] The body of a radiodont could be divided into two regions: head and trunk.
Echidnacaris briggsi is an extinct species of radiodont known from the Cambrian Stage 4 aged Emu Bay Shale of Australia.Formerly referred to as "Anomalocaris" briggsi, it was placed in the new monotypic genus Echidnacaris in 2023. [1]
There a few species of the genus Anomalocaris. As these animals have very soft bodies, their fossils are extremely rare, so it's hard to judge how large each when fully grown. Subject to that: Anomalocaris canadensis is the 3-ft giant, found in the Burgess Shale, about 505 MA. Laggania cambria seems about 6 in. to 1 foot. Also from the Burgess ...
This is no longer the case after the revision done by Vinther et al. 2014, [3] as Anomalocarididae restricted to only Anomalocaris and, if any, a few of closely related genera since then. Wu et al. 2021 accepted only Anomalocaris (excluding "A." saron , "A." kunmingensis and "A." briggsi ) and Lenisicaris as the member of Anomalocarididae, [ 4 ...
Anomalocaris. Arthropoda. Dinocaridida. Resembling a headless shrimp, Anomalocaris was a large radiodont that got up to 50 centimetres (20 in) long. It was the apex predator of the Burgess Fauna, and trilobite remains preserve bite marks that may come from it.
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Laminacaris size diagram. The large frontal appendage is the most prominent and distinctive feature in Cambrian arthropods. [3] [4] The largest frontal appendage of Laminacaris (YKLP 13338) is around 28 cm (11 in) long, which would have belonged to an individual between 53.2–78.4 cm (20.9–30.9 in) long, based on proportion of Innovatiocaris (which is once treated as "Anomalocaris" saron). [5]