Polycystinea - Nassellaria - Farcidae
Original description: Test dicyrtid, cephalis medium in size, hemispherical with long, massive horn. Horn triradiate proximally with three massive ridges alternating with three narrow grooves, circular in axial section distally Cephalis imperforate, covered with layer of microgranular silica. Thorax subspherical in outline, comprised of slightly variable size of polygonal pore frames. Pore frames with circular to elliptical pores. Four feet extending out from distal portion of thorax. Feet thin, medium in length, tapering distally, triradiate with three narrow ridges alternating with three moderately wide grooves. Thorax terminating in small circular aperture.
Original remarks: Farcus lepidus, n. sp., can be distinguished from other Farcus spp. in this report by having a massive horn on the cephalis and four small feet extending out from subspherical thorax.
Etymology: Lepidus-a-um (Latin, adj.) pretty.
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 Farcus according to K. Y. Yeh 1987
Sister taxon: Farcus kozuri
Type specimen: NMNS (000111). Its type locality is Suplee-Izee area, OR-600A, which is in a Toarcian marine tuff/limestone in the Hyde Formation of Oregon.
Distribution:
• Jurassic of United States (3: Oregon collections)
Total: 3 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
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