Bistarkum saginatum Yeh 1987 (radiolarian)

Polycystina - Spumellaria - Angulobracchiidae

Description: Rays extremely short, wide, subellipsoidal in cross-section, with large subtriangular to hemispherical tips. Test comprised of nearly uniformly sized irregular polygonal pore frames. Pore frames without prominent nodes at vertices. Short spines occurring on distal surface of tips and sides of rays.

Etymology: Saginatus-a-um (Latin, adj.) fattened.

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 Bistarkum according to K. Y. Yeh 1987

Sister taxa: Bistarkum bifurcum, Bistarkum brevilatum, Bistarkum coriniforme, Bistarkum cylindratum, Bistarkum martiali, Bistarkum phantomense, Bistarkum rhaeticum, Bistarkum rigidium

Type specimen: NMNS (000047). 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 Canada (4: British Columbia collections), Japan (3), Spain (1), United States (2: Oregon)

Total: 10 collections each including a single occurrence

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Specimen images are retrieved through the ePANDDA API.


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