Protozoa - Nassellaria - Parvicingulidae
Original description: Test subcylindrical, usually with five post-abdominal chambers. Cephalis conical, thorax and subsequent chambers trapezoidal in outline. Earlier chambers sparsely perforate, covered with layer of microgranular silica. Post abdominal chambers consisting of one thick layer of regularly arranged pentagonal and hexagonal pore frames with three transverse rows in each chamber. Pore Frames slightly increasing in size distally. Test with H-link pattern along joints, without well-developed circumferential ridges. Final post-abdominal chamber terminating in large, inflated, spherical expansion.
Full reference: K. Y. Yeh. 1987. Taxonomic Studies of Lower Jurassic Radiolaria from East-Central Oregon. National Museum of Natural Science Special Publications 2:1-169
Belongs to Pseudoristola according to K. Y. Yeh 1987
Sister taxa: Pseudoristola durisaeptum, Pseudoristola horni, Pseudoristola megaglobosa, Pseudoristola tsunoensis
Type specimen: NMNS (000151). Its type locality is Suplee-Izee area, OR-600M, which is in a Toarcian marine tuff/limestone in the Hyde Formation of Oregon.
Ecology: passively mobile planktonic omnivore
Distribution:
• Jurassic of United States (7: Oregon collections)
Total: 7 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.