Test: planispiral or cyclic, lenticular
multicamerate, with septal
flap and canaliculated septa. A spiral marginal cord and spiral canal system is
present in early forms, but is modified in advanced forms or replaced by intraseptal canals. Paleocene to Holocene.
There are four families:
Family Pellatispiridae Hanzawa, 1937
|
Biplanispira
mirabilis (Umbgrove), Late Eocene, Indonesia |
|
Assemblage of
Biplanispira, Discocyclina Java |
|
Miscellanea
meandrina (Carter), Qatar |
|
Pellatispira sp., |
|
. Vacuolispira inflata (Umbgrove), Late Eocene, |
Family
Nummulitidae de Blainville, 1827
Subfamily Heterostegininae Galloway, 1933
|
Grzybowskia
multifida Bieda, Carpathians |
Banner and Hodgkinson (1991) suggested three genera based on
coiling:
1.
Heterostegina (Heterostegina). Late Eocene to Holocene.
|
Heterostegina sp., Indonesia |
2.
Heterostegina (Vlerkina) = Heterostegina (Vlerkinella).
Late Eocene to Late Miocene (Messinian).
|
Heterostegina (Vlerkina) borneensis van der Vlerk, |
3.
Planostegina Banner and Hodgkinson,
1991. Late Paleocene to Holocene.
|
Planostegina sp., Borneo |
|
Spiroclypeus sp., Java |
|
Tansinhokella tatauensis Banner and Hodgkinson, paratype, Tatau Formation, |
Subfamily Nummulitinae de Blainville, 1827
·
Assilina d’Orbigny, 1839. Late
Paleocene (planktonic zone
P4) to Middle Eocene (planktonic zone P14)
|
Assilina granulosa var. chhumbiensis Gill, Lower Bhadra
Beds, |
·
Nummulites Lamarck, 1801. Middle Paleocene to
Early Oligocene
|
Nummulites sp., |
·
Operculina d'Orbigny, 1826. Late Paleocene to Holocene
|
Operculina sp., |
·
Operculinella Yabe, 1918.
Oligocene to Holocene
|
Operculinella sp.,
Florida, USA |
·
Planocamerinoides Cole, 1958. Late
Paleocene to Middle Eocene (Plate 6.19, fig. 14)
·
Ranikothalia Caudri, 1944. Late Paleocene
|
Ranikothalia
sahnii Davies, India |
·
Radiocycloclypeus Tan Sin Hok, 1932. Early Miocene (Burdigalian) to Middle Miocene
(Serravallian).
Family Cycloclypeidae
|
Cycloclypeus sp., |
|
Katacycloclypeus annulatus
(Martin), |
Family Orthophragminidae Vedekind, 1937
Subfamily Discocyclininae Galloway, 1928
|
Asterophragmina pagoda (Rao), |
|
Discocyclina sheppardi Barker, Soldado Rock,
Trinidad |
|
Hexagonocyclina cristensis ( |
|
Pseudophragmina floridana (Cushman), Georgia |
Subfamily Orbitoclypeinae Brönnimann
1946
|
Asterocyclina sp.,
Kopili Formation, Bangladesh |
|
Neodiscocyclina anconensis (Barker), |
|
Orbitoclypeus nummuliticus
(Gümbel), |