| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Orthonema sayrei
Taxonomy
Orthonema sayrei was named by Knight (1934) [Orthonema liratum SAYRE (pars), 1930, Kansas Geo1. Surv. Bull. l7, p. l5l not pl. 17, figs. 2-3]. Its type specimen is U. Kansas Coll., a shell, and it is not a trace fossil.
Synonymy list
| Year | Name and author |
|---|---|
| 1934 | Orthonema sayrei Knight pp. 439 – 440 figs. pl. 56 f. 3 |
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.
†Orthonema sayrei Knight 1934
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1934 | Small, high-spired, slightly turreted gastropods with sides straight at ephebic and convex a t neanic stages; whorl profile shouldered at the two subsutural carinae! flat to gently arched On the sides, gently angulated at the upper Of the two lower revolving carinae, and rounded on the base; sutures shallow; outer lip, as shown by the growth-lines, nearly straight, very shallowly concave toward the aperture; ornamentation four low observed revolving carinae arranged in upper and lower pairs! the inner member of each pair being the more prominent; the uppermost carina a slight distance below the upper suture and separated from the second by a concave band a t least twice as wide as the band between it and the suture; the third carina, the upper one of the lower pair lying just above the lower suture and weaker in development than the lower one of the upper pair; the fourth carina weakly developed, lying on the base well below the line of suture; a circumcolumellar raised area within it; the lines of growth Very obscure; color Pattern unknown. |