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Alveolinidae is a family of spheroidal to fusiform milioline 
Alveolinids first appeared near the beginning of the Late Cretaceous, about 100 million years ago, some 150 million years after the superficially similar
foraminifera
Foraminifera ( ; Latin for "hole bearers"; informally called "forams") are unicellular organism, single-celled organisms, members of a phylum or class (biology), class of Rhizarian protists characterized by streaming granular Ectoplasm (cell bio ...
with multiple apertures and complex interiors in which chambers are subdivided into chamberlets and subfloors interconnected by passageways. As with all Miliolina
The Miliolida are an order of foraminifera with calcareous, porcelacous tests that are imperforate and commonly have a pseudochitinous lining. Tests are composed of randomly oriented calcite needles that have a high proportion of magnesium along ...
, the test
Test(s), testing, or TEST may refer to:
* Test (assessment), an educational assessment intended to measure the respondents' knowledge or other abilities
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* ''Test'' (2013 film), an American film
* ''Test'' (2014 film) ...
wall in alveolinids is porcellaneous and imperforate. In living individuals the pseudopodia emerge through the multiple apertures that line the apertural or leading face of the test.
Alveolinids first appeared near the beginning of the Late Cretaceous, about 100 million years ago, some 150 million years after the superficially similar fusulinids
The Fusulinida is an extinct Order (biology), order within the Foraminifera in which the Foraminifera test, tests are traditionally considered to have been composed of wikt:microgranular, microgranular calcite. Like all forams, they were single- ...
became extinct at the end of the Permian.
Irregular coiling is found in the first volutions in the microspheric forms of most genera, indicating a close relationship with the Miliolidae. ''Alveolinella'' is an exception as the proloculus in the microspheric form is perforate and the first volutions are peneroplid in character, suggesting it, ''Alveolinella'', may have a different origin than the other alveolinids.
Genera
Genera accepted as of May 2025: *'' Alveocella'' *'' Alveolina'' *'' Alveolinella'' *'' Archaealveolina'' *'' Borelis'' *'' Bullalveolina'' *'' Caribalveolina'' *'' Cisalveolina'' *'' Decastroia'' *'' Fabalveolina'' *'' Flosculinella'' *'' Glomalveolina'' *'' Helenalveolina'' *'' Multispirina'' *'' Neomurciella'' *'' Ovalveolina'' *'' Praealveolina'' *'' Praebullalveolina'' *'' Quasiborelis'' *'' Reichelia'' *'' Senalveolina'' *'' Simplalveolina'' *'' Streptalveolina'' *'' Subalveolina''References
*Alfred R. Loeblich Jr
Alfred R. Loeblich Jr (August 15, 1914 – September 9, 1994) was an American micropaleontologist. He was married to Helen Niña Tappan Loeblich and the two co-authored a number of important works on the Foraminifera and related organisms.
Biog ...
and Helen Tappan
Helen may refer to:
People
* Helen of Troy, in Greek mythology, the most beautiful woman in the world
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* Helen, G ...
, 1964, Treatise on Invertebrate Paleontology
The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ...
, Part C, Protista 2; Geological Society of America and University of Kansas Press.
Tubothalamea
Foraminifera families
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