Temporal range: Cambrian Stage 3 – Early Devonian, 521–400 Ma
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Left to right, top to bottom: Amplectobelua symbrachiata, Anomalocaris canadensis, Aegirocassis benmoulai, Peytoia nathorsti, Lyrarapax unguispinus, Cambroraster falcatus, and Hurdia victoria
Scientific classification
Kingdom:
Animalia
Phylum:
Arthropoda
Class:
†Dinocaridida
Order:
†Radiodonta Collins, 1996
Families
†Anomalocarididae
†Amplectobeluidae
†Tamisiocarididae
†Hurdiidae
Genera with uncertain classification
†Caryosyntrips?
†Cucumericrus?
†Houcaris
†Innovatiocaris
†Laminacaris
†Paranomalocaris
Radiodonta is an extinct order of stem-group arthropods that was successful worldwide during the Cambrian period. They may be referred to as radiodonts,[1][2][3]radiodontans,[4][5]radiodontids,[6]anomalocarids,[7] or anomalocaridids,[8][9][10] although the last two originally refer to the family Anomalocarididae, which previously included all species of this order but is now restricted to only a few species.[7] Radiodonts are distinguished by their distinctive frontal appendages, which are morphologically diverse and used for a variety of functions. Radiodonts included the earliest large predators known, but they also included sediment sifters and filter feeders.[11] Some of the most famous species of radiodonts are the Cambrian taxa Anomalocaris canadensis, Hurdia victoria, Peytoia nathorsti, Titanokorys gainessii, Cambroraster falcatus and Amplectobelua symbrachiata, the Ordovician Aegirocassis benmoulai and the Devonian Schinderhannes bartelsi.
^Cong, Pei-Yun; Edgecombe, Gregory D.; Daley, Allison C.; Guo, Jin; Pates, Stephen; Hou, Xian-Guang (2018). "New radiodonts with gnathobase-like structures from the Cambrian Chengjiang biota and implications for the systematics of Radiodonta". Papers in Palaeontology. 4 (4): 605–621. doi:10.1002/spp2.1219. ISSN 2056-2802. S2CID 90258934.
^Cite error: The named reference :6 was invoked but never defined (see the help page).
^Moysiuk, J.; Caron, J.-B. (2019-08-14). "A new hurdiid radiodont from the Burgess Shale evinces the exploitation of Cambrian infaunal food sources". Proceedings of the Royal Society B: Biological Sciences. 286 (1908): 20191079. doi:10.1098/rspb.2019.1079. PMC 6710600. PMID 31362637.
^Cong, Peiyun; Daley, Allison C.; Edgecombe, Gregory D.; Hou, Xianguang (2017-08-30). "The functional head of the Cambrian radiodontan (stem-group Euarthropoda) Amplectobelua symbrachiata". BMC Evolutionary Biology. 17 (1): 208. doi:10.1186/s12862-017-1049-1. ISSN 1471-2148. PMC 5577670. PMID 28854872.
^Cong, Peiyun; Daley, Allison C.; Edgecombe, Gregory D.; Hou, Xianguang; Chen, Ailin (September 2016). "Morphology of the radiodontan Lyrarapax from the early Cambrian Chengjiang biota". Journal of Paleontology. 90 (4): 663–671. doi:10.1017/jpa.2016.67. ISSN 0022-3360. S2CID 88742430.
^Cite error: The named reference collins1996 was invoked but never defined (see the help page).
^ abCite error: The named reference vinther2014 was invoked but never defined (see the help page).
^Cite error: The named reference daley2009 was invoked but never defined (see the help page).
^Cite error: The named reference cong2014 was invoked but never defined (see the help page).
^Van Roy, Peter; Daley, Allison C.; Briggs, Derek E. G. (2015). "Anomalocaridid trunk limb homology revealed by a giant filter-feeder with paired flaps". Nature. 522 (7554): 77–80. Bibcode:2015Natur.522...77V. doi:10.1038/nature14256. PMID 25762145. S2CID 205242881.
^De Vivo, Giacinto; Lautenschlager, Stephan; Vinther, Jakob (2021-07-28). "Three-dimensional modelling, disparity and ecology of the first Cambrian apex predators". Proceedings of the Royal Society B: Biological Sciences. 288 (1955): 20211176. doi:10.1098/rspb.2021.1176. PMC 8292756. PMID 34284622.
Radiodonta is an extinct order of stem-group arthropods that was successful worldwide during the Cambrian period. They may be referred to as radiodonts...
enormous creatures. The two genera have now been placed into the order Radiodonta and are commonly known as radiodonts or anomalocaridids. Since Peytoia...
referred to as the 'AOPK group' by some literatures, as the group compose of Radiodonta (Anomalocaris and relatives), Opabiniidae (Opabinia and relatives), and...
supported, while the affinity of Opabinia as a stem-group arthropod alongside Radiodonta (a clade that includes Anomalocaris and its relatives) and gilled lobopodians...
found that seem to represent transitional fossils between stem (e.g. Radiodonta such as Anomalocaris) and true arthropods. Re-examination in the 1970s...
forms between typical lobopodians and basal arthropods (e.g. Opabinia and Radiodonta). The positions of most other lobopodians (e.g. Hallucigenia and luolishaniids...
miniature Ordovician hurdiid from Wales demonstrates the adaptability of Radiodonta". Royal Society Open Science. 7 (6): 200459. Bibcode:2020RSOS....700459P...
The largest prehistoric animals include both vertebrate and invertebrate species. Many of them are described below, along with their typical range of size...
of arthropodization, in contrast to more derived dinocaridids like the Radiodonta that have robust and sclerotized frontal appendages. Gilled lobopodians...
Anomalocaris was an early marine predator, a member of the stem-arthropod group Radiodonta Opabinia was a bizarre stem-arthropod that possessed five stalked eyes...
Xingliang; Fu, Dongjing (1 May 2021). "New anomalocaridids (Panarthropoda: Radiodonta) from the lower Cambrian Chengjiang Lagerstätte: Biostratigraphic and...
previous equivalent of the common name "anomalocaridid" to the whole Radiodonta. This is no longer the case after the revision done by Vinther et al....
the palaeogeographical distribution of tamisiocaridids (Panarthropoda: Radiodonta)". PalZ. 95 (2): 209–221. doi:10.1007/s12542-020-00545-4. ISSN 1867-6812...
Schinderhannes bartelsi from what is now Germany. Hurdiidae is classified within Radiodonta, a clade of stem-group arthropods. Hurdiidae is defined phylogenetically...
then-curator of the Royal Ontario Museum Desmond H. Collins erected the taxon Radiodonta to encompass Anomalocaris and its close relatives, and included both Hurdia...
the palaeogeographical distribution of tamisiocaridids (Panarthropoda: Radiodonta)". PalZ. 95 (2): 209–221. doi:10.1007/s12542-020-00545-4. ISSN 1867-6812...
blades and paired flap muscles). Phylogenetic analysis with focus on Radiodonta also repeatedly placed Schinderhannes within the radiodont family Hurdiidae...
Its Classification in the Arthropod Class Dinocarida (nov.) and Order Radiodonta (nov.)". Journal of Paleontology. 70 (2): 280–293. Bibcode:1996JPal.....
†Leanchoiliida Order †Yohoiida Order †Acercostraca Order †Marrellida Order †Radiodonta Order †Opabiniida Order †Euthycarcinida Shear, William A.; Edgecombe,...
recent papers have found that it may sit outside of the monophyletic Radiodonta all together. Due to the unusual morphology of the frontal appendages...
Cambrian Chengjiang Lagerstätte and its implications for the phylogeny of Radiodonta". Journal of the Geological Society. 180. doi:10.1144/jgs2021-164. ISSN 0016-7649...
1952. Schinderhannes bartelsi, an extinct Devonian member of the order Radiodonta. The discovery of its fossils in Devonian was astonishing because previously...
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