| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Gyrodes expansa
Taxonomy
Gyrodes expansa was named by Gabb (1864) [ANSP 4245 is lectotype.]. It is extant. Its type specimen is ANSP 4245, a shell.
It was recombined as Gyrodes (Sohlella) expansus by Popenoe et al. (1987).
It was recombined as Gyrodes (Sohlella) expansus by Popenoe et al. (1987).
Sister species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1864 | Gyrodes expansa Gabb p. 108 figs. Pl. 19, fig. 62a-b [only; not fig. 62c |
| 1927 | Gyrodes expansa Stewart pp. 328 - 329 figs. Plate XXII, figs. la, and 3 |
| 1987 | Gyrodes (Sohlella) expansus Popenoe et al. pp. 88 - 89 figs. 6.33-6.38 |
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.
Gyrodes expansa Gabb 1864
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| W. P. Popenoe et al. 1987 | Shell thick for the subgenus, medium to moderately large sized, surface strongly textured by growth lines especially in large individuals; spire about 24% of total height; suture appressed, at posterior third of penultimate whorl; shoulder roundly tabulate; whorl profile flattened abapical to the tabulation, then roundly inflated; umbilical margin roundly subangulate; umbilicus steeply sloping; growth line obliquely prosocline with antispiral flexure within the umbilicus; aperture broadly tear-drop shaped; outer lip thin, projected posteriorly; inner lip thin anteriorly, thickened posteriorly, wrapping onto the last whorl at the umbilical angulation. |