The Planispirillinidae are a family of living
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 ...
[Only Six Kingdoms of Life]
Cavalier-Smith, 2004 and the only one of the
Involutinida now living.
The included genera are characterized by asymmetrical, semi-involute to partially evolute, aragonitic
tests
Test(s), testing, or TEST may refer to:
* Test (assessment), an educational assessment intended to measure the respondents' knowledge or other abilities
Arts and entertainment
* ''Test'' (2013 film), an American film
* ''Test'' (2014 film) ...
consisting of an undivided planispiral or trochospiral tubular chamber wound about the proloculus, or initial chamber. The umbilical region on one or both sides is filled with lamellae. The aperture is a simple opening and the end of the tube.
Family Planispirillinidae
in Loeblich & Tappan 1988, GSI e-book
The genera '' Alanwoodia'' and '' Planispirillina'' are included in the Spirillinidae in the ''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, 1964. The other two were added subsequent to publication.
References
{{Taxonbar, from=Q11100738
Foraminifera families