... to Innovatiocaris . Phylogenetic analysis retrieves Innovatiocaris as either a basal member of Hurdiidae or an early-branching lineage of the non-hurdiid clade. Thus, Innovatiocaris provides new insights into the radiodont phylogeny and illuminates the early diversification of Radiodonta. Supplementary material...

...Figure 6. Reconstructions of Radiodonta from the Kinzers Formation, and other frontal appendages with similar morphology. (a) Anomalocaris pennsylvanica ; (b) Anomalocaris canadensis ; (c) Tamisiocaris aff. borealis ; (d) Tamisiocaris borealis ; (e) Anomalocaris briggsi ; (f...

...Joseph Moysiuk; Jean-Bernard Caron Abstract Radiodonta is a clade of stem euarthropods of central importance to our understanding of the evolution of this phylum. Radiodonts include some of the largest early Paleozoic animals; however, little is known about their ontogeny. We present an analysis...

...Christian R.A. McCall Abstract Lobopodians are an iconic and diverse group of animals from the Cambrian, which alongside radiodonts, present an important window into the evolution of arthropods and the development of Paleozoic ecosystems. Of these, a rare few species outside of Radiodonta possess...

... mouth without sclerotized plates is a real feature of Lyrarapax and supports the idea that oral structures provide valid diagnostic characters within Radiodonta. 25 01 2016 Copyright © 2016, The Paleontological Society 2016 The Paleontological Society. All rights reserved Radiodontans...

... homologies and ancestral crown-group euarthropod relationships, with support for the concept of Pycnogonida as sister taxon to Euchelicerata now contested by proponents of a more basal position between Radiodonta and all other arthropods. A challenge to further elucidation of their phylogenetic position...

... segmented or sclerotized. The taxon is tentatively placed within Radiodonta, but this systematic placement cannot be confirmed while complete body specimens are lacking. The anomalocaridids possess a unique mix of morphological features that lead to a complex history of discovery, description...

... represent a legitimate biological discrepancy, with stem groups being ecologically hyperspecialized relative to crown groups, or are they simply an artifact of the way functional diversity has been measured? Radiodonta provides an exemplary test case. While phylogenetic placements outside...

... Order Radiodonta Collins, 1996 Family Hurdiidae Lerosey-Aubril & Pates, 2018 Genus Cambroraster Moysiuk & Caron, 2019 Description . The specimen is particularly small – c . 8.1 mm and c . 6.9 mm in maximum length (exs.) and maximum width (tr.), respectively – and has been...

...Figure 6. Radiodonta? (KUMIP 491057) collected by the Gunther family from the Antimony Canyon locality, Spence Shale, Langston Formation (Cambrian: Wuliuan), Utah, USA: ( 1, 2 ) possible central carapace element of a hurdiid radiodont in dorsal view and explanatory drawing. le, lateral extension...

... radiodontan phylogeny would be potentially improved by new knowledge on other body parts apart from frontal appendages in future studies. Order Radiodonta Collins, 1996 Monophyly of Radiodonta has been questioned recently because of the unstable phylogenetic position of Schinderhannes bartelsi Kühl...

... Society 2020 The Paleontological Society Radiodonta Collins, 1996 , including anomalocaridids and their allies, were remarkable stem-group euarthropods in the Paleozoic marine faunas (e.g., Whittington and Briggs, 1985 ; Chen et al., 1994 ). As one of the two main lineages of Radiodonta...

... was the first described representative of the clade now known as Radiodonta ( Collins 1996 ), based on specimens from the Trilobite Beds on Mount Stephen ( Whiteaves 1892 ). Resser (1929) erected a new species, A. cranbrookensis , based on a raptorial limb from Cranbrook ( Fig. 2d ). The Anomalocaris limb...

.... This is in agreement with Article 73.1.5 of The International Code of Zoological Nomenclature (ICZN). Our holotype designation stabilizes the species name and associates it with an identified group (Radiodonta: Hurdiidae: Peytoia ), rather than having it attached to a taxonomically...

..., and it is now recognized as a significant taxon within Radiodonta present in several of the well-known Cambrian soft-bodied biotas including the Burgess Shale in Canada and the nearby Stanley Glacier, Marble Canyon, Tulip Beds, and Mount Stephen sites (Daley et al., 2009 , 2013a ); the Jince Formation...