Dactyliodiscus lenticulatus, from Babazadeh & Wever (2004). Scale bar = 25 µm.

Belongs within: Stauraxonaria.

The Pseudoaulophacidae are a group of radiolarians known from the Middle Jurassic to the present (Afanasieva et al. 2005).

Characters (from Afanasieva et al. 2005): Primary lobes (arms), if present, extending along primary spines. Pylome absent. Initial frame in shape of triangular prism. Primary spines lying in equatorial plane extend from each side of prism. Test is discoid, lenticular with tholi, spherical; or armed. Skeleton with 3–12 spines, three of which are primary. External shell spongy or reticular. External ornamentation present. Spongy skeletal tissue built of concentric layers and, partly or completely, consisting of isosceles triangular frames merged in massive nodes.

    |--Pentapylonium Dumitrica 1991 [Pentapyloniinae]AA05
         |--Becus Wu 1986AA05
         |--Dispongotripus Squinabol 1903AA05
         |--Godia Wu 1986AA05
         |--Pessagnoella Kozur & Mostler 1978AA05
         |--Pseudoaulophacus Pessagno 1963AA05
         |    `--P. sculptus (Squinabol 1904)BW04
         |--Alievium Pessagno 1972AA05
         |    `--A. antiquumBL79
         `--Dactyliodiscus Squinabol 1903AA05
              `--D. lenticulatus (Jud 1994)BW04

*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.

[BW04] Babazadeh, S. A., & P. de Wever. 2004. Early Cretaceous radiolarian assemblages from radiolarites in the Sistan Suture (eastern Iran). Geodiversitas 26 (2): 185–206.

[BL79] Basov, V. A., B. G. Lopatin, I. S. Gramberg, A. I. Danjushevskaya, V. Ya. Kaban’kov, V. M. Lazurkin & D. K. Patrunov. 1979. Lower Cretaceous lithostratigraphy near Galicia Bank. Initial Reports of the Deep Sea Drilling Project 47: 683–717.

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