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      Bradoriids are small marine arthropods with a bivalved carapace, and were globally distributed, forming a significant portion of the Cambrian and early Ordovician soft-bodied communities.
Whilst the Bradoriida were traditionally considered as relatives of the modern bivalved arthropod group Ostracoda, the anatomy of their appendages does not support such a relationship; neither are they related to the Cambrian bivalved arthopod group Phosphatocopida. Rather, they are most probably related to the Eucrustacea at a stem-group level. Occurrence
Bradoriida are geographically widespread, and occur in the fossil record shortly before the earliest trilobite fossils. Their taxonomic composition broadly reflects two geographical provinces ("European" and "4A", i.e. America, Asia, Australia, Antarctica) which approximately mirror trilobite provinces, with the 4A area representing warmer waters closer to the palaeoequator.
Reference: Hou et al. (2010)

Img. 152: A reconstruction of the bradoriid Kunmingella (after Hou et al. 2009)
Emeiella Lee, 1975 VK407
Konicekion radionnajdr (1975a), Pl. 3 fig. 1 M2004
Konicekion radionAD, najdr (1975a) M2004
Konicekion radionAD, najdr (1975a) M2004
Konicekion OZ98
Konicekion tix M2007
Konicekion tix M2011
Konicekion tix M2015
Konicekion tix M2016
Konicekion tixnajdr (1975a), Pl. III, fig. 5, 7foto M2005
Konicekion tix M2014
Konicekion tix M2018
Konicekion tix M2006
Konicekion tixnajdr (1975a), Pl. 1, fig. 1, 2foto M2012
Konicekion tix M2017
Konicekion tixnajdr (1975a), Pl. 1, fig. 3, 4, 5foto M2012
Konicekion tixnajdr (1975a), Pl. 2, fig. 1foto M2012
Konicekion tixnajdr (1975a), Pl. II, fig. 2, 3, 4, Pl. III, fig. 4, 6, 8foto M2005
Konicekion tixnajdr (1975a), Pl. II, fig. 5, 6foto M2005
Konicekion tix M2009

Virtual museum of the Czech Geological Survey,, (C) Czech Geological Survey, 2011, v.0.99 [13.12.2011]