''Cyrtospirifer verneuili'', also called ''Spirifer verneuili'', is an extinct species of
brachiopods. The fossils are present in the Upper
Devonian
The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, whe ...
.
In
Cornwall they have the vernacular name Delabole butterfly, from the appearance of flattened forms in the slates at
Delabole.
References
Paleobiology Database
Prehistoric brachiopods
Spiriferida
{{Brachiopod-stub