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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 is a member of the anomalocarididae family, which at one point included all radiodonts, but now only includes a few genera such as Lenisicaris. Amplectobelua and Lyrarapax are representatives of the amplectobeluidae which is a very inclusive family of mainly Chinese radiodonts.
Anomalocarididae [1] (occasionally mis-spelt Anomalocaridae [2]) is an extinct family of Cambrian radiodonts, a group of stem-group arthropods. [3] [4]Around 1990s and early 2010s, Anomalocarididae included all radiodont species, hence the previous equivalent of the common name "anomalocaridid" to the whole Radiodonta. [5]
H. saron, known from Maotianshan Shale in Yunnan, is first described in 1995 as Anomalocaris saron. [4] This species is only known from frontal appendages. There is a specimen (ELRC 20001) that is previously considered as whole body fossil of this species, [4] but later study shows that this specimen is not belonging to this species, and later given own genus Innovatiocaris.
Formerly referred to as "Anomalocaris" briggsi, it was placed in the new monotypic genus Echidnacaris in 2023. [1] It is only distantly related to true Anomalocaris, and is instead placed in the family Tamisiocarididae. [2] Echidnacaris is primarily known from its frontal appendages which had 13 podomeres. [1]
Schinderhannes bartelsi is a species of hurdiid radiodont (anomalocaridid), known from one specimen from the Lower Devonian Hunsrück Slates.Its discovery was astonishing because the latest definitive radiodonts were known only from the Early Ordovician, [1] at least 66 million years earlier than this taxon.
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An armoured lobopodian of the Family Luolishaniidae is known from a single specimen that closely resembles an unnamed species from the Burgess Shale popularly known as Collins' Monster. In 2011, seven fossils of large, isolated compound eyes were described from the inland quarry site at Emu Bay , as well as the first well-preserved visual ...