Polycystinea - Spumellaria - Angulobracchiidae
Original description: Test large with three rays nearly equal in length. Rays long, moderate in width, subcircular in outline, terminating in large rhombohedral tips with a medium length triradiate spines originating from central portion of tips. Test comprised of nearly uniformly sized sublinearly arranged triangular pore frames on ray shafts and more irregularly arranged polygonal pore frames on tips. Pore frames larger on ray shafts and smaller in central area, all pore frames with nodes at vertices.
Original remarks: Sontonaella snowshoensis, n. sp., di&64256;ers from S. bona, n. sp., by having rays consisting chie&64258;y of triangular pore frames rather than tetragonal pore frames, and by having three ray shafts with three large rhombohedral tips rather than with one rhombohedral tip and two ellipsoidal tips.
Etymology: This species is named for the Snowshoe Creek
near its type locality. Description:
Alternative combination: Sontonaella snowshoensis
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 Paronaella according to S. Gorican et al. 2006
See also Yeh 2011
Sister taxa: Paronaella araneae, Paronaella bandyi, Paronaella beatricia, Paronaella bifida, Paronaella bona, Paronaella botanyensis, Paronaella broennimanni, Paronaella cava, Paronaella claviformis, Paronaella coalescenda, Paronaella communis, Paronaella corpulenta, Paronaella curticrassa, Paronaella denudata, Paronaella fera, Paronaella gemmata, Paronaella grahamensis, Paronaella hirsuta, Paronaella impella, Paronaella inornata, Paronaella isariana, Paronaella kotura, Paronaella mulleri, Paronaella multifera, Paronaella norica, Paronaella notabilis, Paronaella obesa, Paronaella pacofiensis, Paronaella pessagnoi, Paronaella pristidentata, Paronaella pygmaea, Paronaella ravenensis, Paronaella skenaensis, Paronaella skowkonaensis, Paronaella solanoensis, Paronaella speciosa, Paronaella striata, Paronaella trammeri, Paronaella trifoliacea, Paronaella tripla, Paronaella triporosa, Paronaella tubulata, Paronaella turgida, Paronaella ultrabifida, Paronaella venusta, Paronaella yaogusensis, Sontonaella concinna, Sontonaella spongiosa, Archaeotriastrum dentatum, Archaeotriastrum mostleri
Type specimen: NMNS (000055). Its type locality is Suplee-Izee area, OR-589D, which is in a Toarcian marine mudstone/limestone in the Snowshoe Formation of Oregon.
Distribution:
• Jurassic of Mexico (1 collection), United States (5: Oregon)
Total: 6 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.