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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.[1] They were planktic organisms with urn-shaped, calcitic tests that had a widespread distribution across the Tethys Ocean from the late Tithonian to the early Valanginian and were characterised by rapid evolution, and their abundant remains in deep sea sediments from this interval are important as they allow long distance biostratigraphic correlation and precise dating.[2] Calpionellids were not confined to the Tethys, as they have also been found in the Vaca Muerta of northern Patagonia, in what was then the southeastern Pacific.[3] Calpionellids are divided into two main families, the Chitinoidellidae, which are the earliest members of the group, appearing in the mid Tithonian, characterised by microgranular lorica. Calpionellidae appear later, including widespread genera such as Calpionella and Calpionellites, and have combined microgranular and hyaline lorica. A third family, the Semichitinoidellidae are sometimes recognised.[4]
The name is derived from the Greek "κάλπις", meaning "water jug".
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 that had a widespread distribution across the Tethys Ocean from the late Tithonian to the early Valanginian and were characterised by rapid evolution, and their abundant remains in deep sea sediments from this interval are important as they allow long distance biostratigraphic correlation and precise dating. Calpionellids were not confined to the Tethys, as they have also been found in the Vaca Muerta of northern Patagonia, in what was then the southeastern Pacific. Calpionellids are divided into two main families, the Chitinoidellidae, which are the earliest members of the group, appearing in the mid Tithonian, characterised by microgranular lorica. Calpionellidae appear later, including widespread genera such as Calpionella and Calpionellites, and have combined microgranular and hyaline lorica. A third family, the Semichitinoidellidae are sometimes recognised.
Los calpionélidos (Calpionellidae) son una familia de protistas alveolados unicelulares cuyos fósiles se encuentran en estratos desde el Jurásico superior al Cretácico inferior.[1] Son protistas planctónicos muy comunes en las calizas micríticas de sedimentos pelágicos. Presentan un caparazón de calcita con forma oval o alargada, pudiendo estar la abertura bordeada por un collar. Su nombre de deriva del término griego "κάλπις", que significa "jarra de agua", haciendo referencia a su forma.
Datos: Q5023919
Los calpionélidos (Calpionellidae) son una familia de protistas alveolados unicelulares cuyos fósiles se encuentran en estratos desde el Jurásico superior al Cretácico inferior. Son protistas planctónicos muy comunes en las calizas micríticas de sedimentos pelágicos. Presentan un caparazón de calcita con forma oval o alargada, pudiendo estar la abertura bordeada por un collar. Su nombre de deriva del término griego "κάλπις", que significa "jarra de agua", haciendo referencia a su forma.
