| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Bistarkum bifurcum
Discussion
Description: Ray shafts relatively narrow, subequal in length, terminating in long bifurcating tips. Tips usually four times as wide as ray shafts. Several small spines occurring at sides of rays and distal surface of tips. Test comprised mainly of triangular and tetragonal pore frame. Pore frames small, with nodes at vertices.
Etymology: Bifurcus-a-um (Latin, adj.) having two prongs of forks.
Taxonomy
Bistarkum bifurcum was named by Yeh (1987). Its type specimen is NMNS (000043) and is a 3D body fossil. Its type locality is Suplee-Izee area, OR-589D, which is in a Toarcian marine mudstone/limestone in the Snowshoe Formation of Oregon.
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1987 | Bistarkum bifurcum Yeh p. 43 figs. Pl. 1, fig. 10; Pl. 22, figs. 5, 6 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Bistarkum bifurcum Yeh 1987
show all | hide all
Diagnosis
No diagnoses are available