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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.
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]
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.
Guanshancaris is an extinct genus of amplectobeluid radiodont known from the Cambrian Stage 4 Guanshan Biota of southern China. It is only known from a single species. G. kunmingensis which was described in 2013 as a species of Anomalocaris [1] before being placed in a new genus in 2023.
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.
Ivan Boszormenyi-Nagy (May 19, 1920 – January 28, 2007) was a Hungarian-American psychiatrist and one of the founders of the field of family therapy.Born Iván Nagy, his family name was changed to Böszörményi-Nagy during his childhood.
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