''Parafusulina'' is a genus of

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 ...

included in the fusulinacean family

Schwagerinidae The Schwagerinidae comprise a family of large, generally fusiform, foraminiferans included in the Fusulinacea, a superfamily of Fusulinida, fusulinids, locally abundant during the later Carboniferous (Pennsylvanian (geology), Pennsylvanian) and ...

that were extant during the

Permian The Permian ( ) is a geologic period and System (stratigraphy), stratigraphic system which spans 47 million years, from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.902 Mya. It is the s ...

. The shell, or test, of ''Parafusulina'' is elongate, up to 65 mm in length, fusiform to subcylindrical in shape, tapering slightly to the bluntly rounded poles. The proloculus is large, followed by seven to nine gradually enlarging volutions, coiled around a straight to irregular axis. Septa are numerous, intensely and regularly fluted, folds of adjacent septa touching and forming numerous chamberlets above the floor of the chambers. Walls (spirotheca) are composed of an outer tectum and inner alveolar keriotheca and are thin in relation to the size of the

test 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) ...

. Tunnels, single in any individual, are low and well defined but are without bordering chomata. Axial fillings are pronounced. Believed to have existed in the Permian period.

References

* M.L. Thompson, 1964. ''in'' Loeblich and Tappan, 1964. Sarcodina Chiefly "Thecamoebians" and Foraminiferida;

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. p. ''C-420'' * ''Parafusulina''
Schwagerinindae
Loeblich and Tappan, 1988

Foraminifera genera Permian life Radiolarian genera {{foram-stub