Polycystinea - Nassellaria - Ultranaporidae

Original description: Cephalis conical, medium in size; distal half covered with layer of microgranular silica, proximal half with small polygonal pore frames. Horn massive, short with rounded distal end; triradiate in axial section with three ridges. Ridges of proximal two thirds of horn wide, then giving rise to weakly developed node-like spine; ridges of distal one third decreasing rapidly in width. Thorax lobate, comprised of relatively large polygonal (tetragonal, pentagonal, and hexagonal) pore frames. Pore frames. Pore frames with relatively thick rims and sides. Feet short, massive, curving inwards, triradiate in axial section with three wide, rounded ridges alternating with three wide grooves. Aperture small, subcircular in outline.

Original remarks: Napora propria, n. sp., differs from other Napora spp. in this report by having a test with a short massive horn and short, massive feet which curve inwards.

Etymology: Proprius-a-um (Latin, adj.) distinctive.

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 aperta, 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 pualensis, Napora pyramidalis, Napora relica, Jacus coronatus, Jacus isa, Jacus clatratus, Jacus sandspitensis

Type specimen: NMNS (000135). Its type locality is Suplee-Izee area, OR-600M, which is in a Toarcian marine tuff/limestone in the Hyde Formation of Oregon.

Distribution:

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Specimen images are retrieved through the ePANDDA API.