Full reference: C. Poulsen. 1967. Fossils from the Lower Cambrian of Bornholm. Danske Videnskabernes Selskab, Matematisk-Fysiske Meddelelser 36(2):1-48
Parent taxon: Aculifera according to J. Vinther et al. 2017
See also Conway Morris and Chapman 1997, Kouchinsky et al. 2017, Parkhaev and Demidenko 2010 and Vinther and Nielsen 2005
Sister taxon: Inughuitoconus
Subtaxa: Halkieriinae
Type: Halkieria
Ecology: epifaunal grazer
Distribution:
• Cambrian of Australia (46 collections), Canada (12: Newfoundland and Labrador, Nova Scotia), China (113), Greenland (6), Kazakhstan (9), Kyrgyzstan (2), Mongolia (2), the Russian Federation (27), Turkey (1), United States (6: Massachusetts, New York)
• Placentian of United States (1: Massachusetts)
Total: 225 collections including 309 occurrences