Sphaerozoum italicum, from Haeckel (1862).

Belongs within: Collodaria.

The Sphaerozoidae are a group of colonial radiolarians known from the Triassic to the present (Afanasieva et al. 2005).

Characters (from Afanasieva et al. 2005): Colonial Collodaria with spiny skeleton, represented by simple or paired spines arranged tangentially around each individual of colony. Mineral skeleton may be absent.

    |--Belonozoum Haeckel 1887AA05
    |--Raphidozoum Haeckel 1862AA05
    |    `--R. acuferumPB04
    |--Thalassophysa Haeckel 1881PB04, AA05
    |    |--T. pelagicaPB04
    |    `--T. sanguinolentaPB04
    |--Collozoum Haeckel 1862AA05
    |    |--C. inerme (Müller 1855)AA05
    |    |--C. pelagicumPB04
    |    `--C. serpentinumAA05
    `--Sphaerozoum Meyen 1834AA05
         |--S. italicumBM05
         |--S. ovodimareH04
         |--S. punctatum (Meyn 1834)AA05
         `--S. spinosissimumH04

*Type species of generic name indicated


[AA05] Afanasieva, M. S., E. O. Amon, Y. V. Agarkov & D. S. Boltovskoy. 2005. Radiolarians in the geological record. Paleontological Journal 39 (Suppl. 3): S135–S392.

[BM05] Bass, D., D. Moreira, P. López-García, S. Polet, E. E. Chao, S. von der Heyden, J. Pawlowski & T. Cavalier-Smith. 2005. Polyubiquitin insertions and the phylogeny of Cercozoa and Rhizaria. Protist 156: 149–161.

[H04] Haeckel, E. 1899–1904. Kunstformen der Natur. Bibliographisches Institut: Leipzig und Wien.

[PB04] Polet, S., C. Berney, J. Fahrni & J. Pawlowski. 2004. Small-subunit ribosomal RNA gene sequences of Phaeodarea challenge the monophyly of Haeckel’s Radiolaria. Protist 155 (1): 53–63.

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