Calpionella

Calpionella is an extinct genus of calpionellid, a group of single celled eukaryotes. Their fossils are found in rocks of Upper Jurassic to Lower Cretaceous age.

Etymology
The name is derived from the Greek "κάλπις", meaning "water jug".

Biostratigraphic significance
The first occurrence of the species Calpionella alpina marks the beginning of the Berriasian and thus Cretaceous.

Distribution
Fossils of the genus have been found in:
 * Jurassic
 * Guasasa Formation, Cuba
 * Stramberk Formation, Czech Republic
 * Cretaceous
 * Puke, Albania
 * Argiles de Ghriss Formation, Algeria
 * Steinmühl Formation, Austria
 * Abenaki Formation, Nova Scotia, Canada
 * Guasasa Formation, Cuba
 * Lake Rożnów, Poland
 * Lapos Formation, Romania
 * Miravetes and Tollo Formations, Spain