The shell (about 130–140 μm long) has an asymmet- ric, elliptic shape. In the centre of the shell often a spongy, dark disc can be found, which is surrounded by about three whorls of a single (?) spiral, which are generally irregular in shape. In some specimens the spiral is very weak or absent. A distinct polar cap can be seen in many specimens. The shell surface is rather smooth, due to the irregular-sized pores which lack frames. A wide pylome with teeth is present.
Biogeography and Palaeobiology
Geological Range: Last occurrence (top): within Neogene Period (2.59-23.03Ma, top in Piacenzian stage). Data source: Lazarus et al. 2015 - "N age group" First occurrence (base): within Neogene Period (2.59-23.03Ma, base in Aquitanian stage). Data source: Lazarus et al. 2015 - "N age group"
Plot of occurrence data:
Range-bar - range as quoted above, pink interval top occurs in, green interval base occurs in.
Triangles indicate an event for which a precise placement has been suggested
(NB There is no histogram as there are no occurrence records for the taxon in the Neptune database) Parent: Larcopyle
Lazarus, D., Faust, K. & Popova-Goll, I. (2005). New species of prunoid radiolarians from the Antarctic Neogene. Journal of Micropalaeontology. 24(2): 97-121. gs
Larcopyle nebulum compiled by the radiolaria@mikrotax project teamviewed: 29-11-2023