The smallest known heliozoans are the Erebor lineage (nom. clad. n.) inside Microheliella maris (Eukaryota, Diaphoretickes), with the amendation of M. maris diagnosis and description of Berkeleyaesol magnus gen. nov., comb. nov. (Eukaryota, incertae sedis). International Journal of Systematic and Evolutionary Microbiology, 71(4) 2021: 1-9. 7 [Zoological Record Volume 159]