''Calpionella'' is an extinct genus of

calpionellid Calpionellids are an extinct group of eukaryotic single celled organisms of uncertain affinities. Their fossils are found in marine rocks of Upper Jurassic to Lower Cretaceous age. They were planktic organisms with urn-shaped, calcitic tests tha ...

, a group of single celled

eukaryote Eukaryotes () are organisms whose cells have a nucleus. All animals, plants, fungi, and many unicellular organisms, are Eukaryotes. They belong to the group of organisms Eukaryota or Eukarya, which is one of the three domains of life. Bacter ...

s.''Calpionella''
at

Fossilworks Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database, a large relational database assembled by hundreds of paleontologists from around the world. History Fossilworks was crea ...

.org Their fossils are found in rocks of

Upper Jurassic The Late Jurassic is the third epoch of the Jurassic Period, and it spans the geologic time from 163.5 ± 1.0 to 145.0 ± 0.8 million years ago (Ma), which is preserved in Upper Jurassic strata.Owen 1987. In European lithostratigraphy, the name ...

Lower Cretaceous Lower may refer to: * Lower (surname) * Lower Township, New Jersey *Lower Receiver (firearms) * Lower Wick Gloucestershire, England See also *Nizhny Nizhny (russian: Ни́жний; masculine), Nizhnyaya (; feminine), or Nizhneye (russian: Н� ...

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 In the geological timescale, the Berriasian is an age/stage of the Early/Lower Cretaceous. It is the oldest subdivision in the entire Cretaceous. It has been taken to span the time between 145.0 ± 4.0 Ma and 139.8 ± 3.0 Ma (million years ag ...

and thus

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...

Distribution

Fossils of the genus have been found in: ;Jurassic *

Guasasa Formation The Guasasa Formation is a geologic formation in Cuba. It is Tithonian to Early Valanginian in age and contains fossils of ammonite Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. ...

, Cuba * Stramberk Formation, Czech Republic ;Cretaceous *

Puke Vomiting (also known as emesis and throwing up) is the involuntary, forceful expulsion of the contents of one's stomach through the mouth and sometimes the nose. Vomiting can be the result of ailments like food poisoning, gastroenterit ...

, Albania * Argiles de Ghriss Formation, Algeria * Steinmühl Formation, Austria * Abenaki Formation, Nova Scotia, Canada *

, Cuba * Lake Rożnów, Poland * Lapos Formation, Romania * Miravetes and Tollo Formations, Spain

References

Alveolata genera Prehistoric SAR supergroup genera Index fossils Late Jurassic first appearances Early Cretaceous extinctions Jurassic Cuba Cretaceous Cuba Fossils of Cuba Fossils of the Czech Republic Fossils of Albania Fossils of Algeria Cretaceous Austria Fossils of Austria Cretaceous Nova Scotia Fossils of Canada Fossils of Poland Cretaceous Romania Fossils of Romania Cretaceous Spain Fossils of Spain Fossil taxa described in 1902 {{cretaceous-life-stub