Protozoa - Nassellaria - Poulpidae
Original description: Test hemispherical, with inner latticed layer of microgranular silica. Cephalis with cephalocone-like structure "ditreme" connecting with vertical bar. Horn massive, long, triradiate with three wide, rounded ridges alternating with three narrow grooves. Feet thin, medium in length, nearly as long as horn, triradiate, tapering distally, and curving inwards.
Original remarks: Saitoum dickinsoni, n. sp., differs from other Saitoum spp. in this report by having a smooth, imperforate (with the exception of ditreme) test with long massive horn and thin feet.
Etymology: This species is named for Dr. W. R. Dickinson for his contribution to the geology of east-central Oregon, Tethyan Realm.
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 Saitoum according to K. Y. Yeh 1987
Sister taxa: Saitoum cepeki, Saitoum corniculum, Saitoum coronarium, Saitoum curvipedatum, Saitoum dercourti, Saitoum elegans, Saitoum keki, Saitoum levium, Saitoum pagei, Saitoum smithi, Saitoum thayeri, Saitoum trichylum, Saitoum triumphense
Type specimen: NMNS (000157). 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 Japan (7 collections), Slovenia (1), United States (1: Oregon)
Total: 9 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.