World Register of Marine Species (WoRMS)
WoRMS (2026). Astrosphaera hexagonalis Haeckel, 1887. Accessed at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=493304 on 2026-08-30
Haeckel, E. (1887). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-76. Report on the Scientific Results of the Voyage of H.M.S. Challenger during the years 1873–76. Zoology. 18 (part 40): i-clxxxviii [188], 1-1803, pl. 1-140.