Calpionella is an extinct genus of calpionellid, a group of single-celled eukaryotes.Calpionella at Fossilworks.org Their fossils are found in rocks of Upper Jurassic to Lower Cretaceous age.
Etymology The name is derived from Greek κάλπις, kálpis '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
References