ammonites
Palaeospiculum arcussimile Won and Below 1999 (radiolarian)

Radiolaria - Spumellaria - Palaeospiculumidae

Full reference: M.-Z. Won and R. Below. 1999. Cambrian Radiolaria from the Georgina Basin, Queensland, Australia. Micropaleontology 45(4):325-363

Belongs to Palaeospiculum according to M.-Z. Won and R. Below 1999

Sister taxa: Palaeospiculum burkensis, Palaeospiculum dendroeides, Palaeospiculum devoncourtensis, Palaeospiculum georginaensis, Palaeospiculum greenpointensis, Palaeospiculum grosmorensis, Palaeospiculum hexaradiatum, Palaeospiculum martinpointensis, Palaeospiculum parvum, Palaeospiculum radiatum, Palaeospiculum reedae, Palaeospiculum tetraradiatum

Type specimen: 7306J-2373, a test

Ecology: passively mobile planktonic omnivore