Protozoa - Spumellaria - Hagiastridae
Description: Test with short rays and large central area. Rays medium in width, subrectangular in axial section, with three to four external beams and two to three rows of pore frames. Pore frames triangular to tetragonal on rays, more irregular in central area, with massive nodes at vertices when well-preserved. Central area subrectangular in outline. Primary spines long, massive, triradiate proximally, circular in axial section distally. Test with or without patagium.
Etymology: Hilarus-a-um (latin , adj.) Glad.
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 Pseudocrucella according to K. Y. Yeh 1987
Sister taxa: Pseudocrucella kubischa, Pseudocrucella ornata, Pseudocrucella pecta, Pseudocrucella sanfilippoae, Pseudocrucella tangae
Type specimen: NMNS (000021). Its type locality is Suplee-Izee area, OR-589D, which is in a Toarcian marine mudstone/limestone in the Snowshoe Formation of Oregon.
Ecology: passively mobile planktonic omnivore
Distribution:
• Jurassic of United States (2: Oregon collections)
Total: 2 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.