Type species:Saturninus triplex  Haeckel (SM)
Description:Stylosphaerida with three concentric lattice-spheres and two equal opposite spines, connected at the distal end by a circular or elliptical ring.
Remarks:The genus Saturninus differs from the similar Saturnulus by the triplication of the spherical lattice-shell; the inner shell is enclosed in the central capsule, whilst both the others lie outside it.
Stratigraphic range:[No information given]
Etymology:Similar to saturnus, with a ring.
Subsequent descriptions:YES

Description and dimensions:Radial proportion of the three spheres = 4: 3: 1. Inner cortical shell with regular, circular pores, of the same breadth as the bars, sixteen to eighteen on the half equator; outer cortical shell connected with the inner by numerous bristle-like radial spines, network very delicate, cobweb-shaped, with irregular polygonal meshes. Ring elliptical, two and a half times as broad as the outer shell.
      Diameter of the inner sphere 30µm, middle 90µm, outer 120µm; pores and bars of the middle shell 4µm; major axis of the elliptical ring 300µm, minor 250µm; thickness of the ring and the axial beams 8µm.
Repository:[No information given]
Type locality:Plankton, Central Pacific, Challenger Station 272, 03°48'S-152°56' W, sea surface.
Original stratigraphic range:Recent
Etymology:[No information given]
Subsequent descriptions:?

Literature cited:- Haeckel, E. (1887a). Report on the Radiolaria collected by H.M.S. Challenger during the years 1873-1876. Report on the Scientific Results of the Voyage of the H.M.S. Challenger, Zoology, 18, clxxxviii + 1803.