Protozoa - Nassellaria - Ultranaporidae
Original description: Cephalis very small, covered by layer of microgranular silica, with or without converging ridges (pl. 26, 18-19). Horn short, massive, triradiate with three narrow ridges alternating with three wide grooves, grooves about twice as wide as
ridges. Three node-like spines appearing on ridges in middle of horn. Thorax mod erately large, hemispherical in outline, with mixture of large tetragonal, pentagonal, and hexagonal pore frames. Pore frames with rims thick in sides. Pore frames linearly aligned as four to five transverse rows. Feet long, triradiate, with three rounded ridges alternating with three grooves; grooves about as wide as ridges. Aperture large, subtriangle in outline, with latticed velum-like extension when well preserved (pl. 26, figs. 9, 20).
Original remarks: Napora aperta, n. sp., differs from N. sandspitensis Pessagno, Whalen, and Yeh by having a more massive horn, by lacking a spine-like cephalocone on cephalis, and by lacking well-developed transverse ridges on thorax.
Etymology: Apertus-a-um (Latin, adj.) intelligible.
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 Napora according to K. Y. Yeh 1987
Sister taxa: Napora antelopensis, Napora baumgartneri, Napora bearensis, Napora blechschmidti, Napora bukryi, Napora conothorax, Napora cosmica, Napora deweveri, Napora durhami, Napora graybayensis, Napora imperfossa, Napora irregularis, Napora latissima, Napora milleri, Napora opaca, Napora pacifica, Napora parva, Napora proba, Napora propria, Napora pualensis, Napora pyramidalis, Napora relica, Jacus coronatus, Jacus isa, Jacus sandspitensis, Jacus clatratus
Type specimen: NMNS (000131). 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.