PBDB Taxon

Basic info	Taxonomic history	Classification	Included Taxa
Morphology	Ecology and taphonomy	External Literature Search	Age range and collections

Oliganisus

Ostracoda - Palaeocopida - Kloedenellidae

Taxonomy

Oliganisus is a genus. It is not extant.

It was assigned to Amphissitidae by Hoare and Mapes (2000); to Palaeocopida by Sepkoski (2002); and to Kloedenellidae by Shi and Chen (1987), Tanaka (2018).

Species

Ellipsella calcar, Ellipsella distenta, O. punctatus, O. ryozensanensis

Synonyms

Ellipsella is a genus. It is not extant.

It was synonymized subjectively with Oliganisus by Benson et al. (1961).

It was assigned to Palaeocopida by Sepkoski (2002).
Neokloedenella is a genus. It is not extant.

It was synonymized subjectively with Oliganisus by Benson et al. (1961).

It was assigned to Palaeocopida by Sepkoski (2002).

Synonymy list

Year	Name and author
1987	Oliganisus Shi and Chen p. 33
2000	Oliganisus Hoare and Mapes p. 8
2002	Ellipsella Sepkoski
2002	Neokloedenella Sepkoski
2002	Oliganisus Sepkoski
2018	Oliganisus Tanaka p. 13

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Ecdysozoa	Aguinaldo et al. 1997
—	Panarthropoda
phylum	Arthropoda	Latreille 1829
—	Deuteropoda
—	Mandibulata
—	Pancrustacea	Zrzavý and Štys 1997

Rank	Name	Author
—	Hymenostraca	(Rolfe 1969)
superclass	Oligostraca	Zrzavý et al. 1997
class	Ostracoda
subclass	Podocopa	Sars 1865
order	Palaeocopida	Henningsmoen 1953
suborder	Kloedenellocopina	Scott 1961
superfamily	Kloedenelloidea	(Ulrich and Bassler 1908)
family	Kloedenellidae	Ulrich and Bassler 1908
genus	Oliganisus

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. †Oliganisus

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†Oliganisus punctatus Geis 1932

†Oliganisus ryozensanensis Tanaka 2018

Invalid names: Ellipsella [synonym], Neokloedenella [synonym]

Diagnosis

No diagnoses are available

Measurements

part	N	mean	minimum	maximum	median	s.d.
carapace height	3	0.395	0.320	0.480	0.400	0.080
valve height	2	0.252	0.250	0.254	0.252	0.003

Composition:

low Mg calcitec

Environment:

hypersaline, marine, brackish, freshwaterc

Locomotion:

actively mobilec

Life habit:

epifaunalo

Diet:

suspension feedero

Vision:

limitedc

Created:

2010-02-06 00:42:06

Modified:

2010-02-23 22:46:12

Source: o = order, c = class

References: Kiessling 2004, Alvarez et al. 2008

Age range: base of the Givetian to the top of the Changhsingian or 387.95000 to 251.90200 Ma

Collections (22 total)

Time interval	Ma	Country or state	Original ID and collection number
Givetian	387.95 - 382.31	USA (New York)	Neokloedenella sp. (94048)
Meramecian	342.9 - 335.4	USA (Kentucky)	O. sp. (2711)
Kasimovian	307.0 - 303.7	USA (Kansas)	Jonesina distenta (133144)
Gzhelian	303.7 - 298.9	USA (Kansas)	Jonesina distenta (95377 132990 132993 133136 133138 133142)
Virgilian	303.7 - 298.9	USA (Texas)	Cytherella calcar (215238)
Asselian	298.9 - 293.52	USA (Kansas)	Jonesina distenta (95379)
Sakmarian	293.52 - 290.1	Japan	O. ryozensanensis (197662)
Sakmarian	293.52 - 290.1	USA (Kansas)	Jonesina distenta (110317)
Artinskian	290.1 - 283.3	USA (Kansas)	Jonesina distenta (110313 110316)
Changhsingian	254.14 - 251.902	Serbia	O. sp. (112045 112049)
Changhsingian	254.14 - 251.902	China (Zhejiang)	O. punctatus (117590 117596 117664 117668)
Changhsingian	254.14 - 251.902	China (Guizhou)	O. sp. 1 (132516)