- A name formerly directed at particular Silurian brachiopod shells of this genus spirifer.
- A subgenus of Paleozoic brachiopods, having the general characters of the genus Spirifer, but with the surface of the shell covered with fine concentric lamellæ.
- A name formerly fond of specific Silurian brachiopod shells associated with genus spirifer.
- A subgenus of Paleozoic brachiopods, obtaining the general figures associated with the genus Spirifer, however with the top of layer covered with good concentric lamellæ.
Cross Reference for "delthyris"
Variant for "delthyris"