PBDB Taxon

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

Oxytoma (Hypoxytoma)

Bivalvia - Pectinida - Oxytomidae

Taxonomy

Hypoxytoma was named as a genus. It is not extant.

It was reranked as Oxytoma (Hypoxytoma) by Cox et al. (1969).

It was assigned to Oxytoma by Cox et al. (1969); and to Pterioida by Sepkoski (2002).

Subtaxa

Oxytoma (Hypoxytoma) nebrascana

Species lacking formal opinion data

Hypoxytoma abrupta, Hypoxytoma danica, Hypoxytoma fallaciosa, Hypoxytoma semiglobosa, Hypoxytoma volgensis, Oxytoma agrawali, Oxytoma arcricostata, Oxytoma arcticostata, Oxytoma arizonensis, Oxytoma articostata, Oxytoma censoriensis, Oxytoma censorius, Oxytoma contorta, Oxytoma cornueliana, Oxytoma costata, Oxytoma czekanovskii, Oxytoma danica, Oxytoma danica, Oxytoma danica, Oxytoma danica, Oxytoma dieneri, Oxytoma dumortieri, Oxytoma expansa, Oxytoma ferrugineum, Oxytoma ferrugineum, Oxytoma gussevi, Oxytoma inaequivalis, Oxytoma inaequivalve, Oxytoma inaequivalvis, Oxytoma inaequivalvis, Oxytoma inaequvalve, Oxytoma inaquivalve, Oxytoma inequivalva, Oxytoma intermedia, Oxytoma jacksoni, Oxytoma kashiwaiensis, Oxytoma koniensis, Oxytoma laevicostata, Oxytoma majsisovosi, Oxytoma mclearni, Oxytoma mojsisovicsi, Oxytoma multistriata, Oxytoma multistriatum, Oxytoma munsteri, Oxytoma oppeli, Oxytoma papyria, Oxytoma pectinatum, Oxytoma pulchra, Oxytoma seminudum, Oxytoma semiradiata, Oxytoma sinemuriensis, Oxytoma startense, Oxytoma subzitteli, Oxytoma tenuicostata, Oxytoma tetoriense, Oxytoma tetoriensis, Oxytoma tetoriensis, Oxytoma trechmanni

Synonymy list

Year	Name and author
1969	Oxytoma (Hypoxytoma) Cox et al. p. N345
2002	Hypoxytoma Sepkoski

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Bivalvia
—	Eubivalvia
subclass	Autobranchia	(Groblen 1894)
infraclass	Pteriomorphia	(Beurlen 1944)

Rank	Name	Author
—	Ostreomorphi	Ferussac 1822
—	Ostreioni	Ferussac 1822
—	Ostreata	Ferussac 1822
superorder	Ostreiformii	Ferussac 1822
order	Pectinida	(Gray 1854)
suborder	Anomiidina	Gray 1854
—	Monotoidei	Waterhouse 2001
superfamily	Oxytomoidea	Ichikawa 1958
family	Oxytomidae	Ichikawa 1958
genus	Oxytoma	(Meek and Hayden 1865)
subgenus	Hypoxytoma

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.

Subg. †Oxytoma (Hypoxytoma)

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†Oxytoma (Hypoxytoma) nebrascana Evans and Shumard 1857

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

low Mg calciteg

Environment:

marineo

Locomotion:

stationaryg

Attached:

yesg

Life habit:

epifaunalg

Diet:

suspension feederg

Vision:

blindc

Created:

2007-11-26 08:09:02

Modified:

2007-11-26 10:09:02

Source: g = genus, o = order, c = class

References: Aberhan et al. 2004, Kiessling 2004

Age range: base of the Tithonian to the top of the Early/Lower Maastrichtian or 149.20000 to 66.00000 Ma

Collections (60 total)

Time interval	Ma	Country or state	Original ID and collection number
Oxfordian - Tithonian	161.5 - 143.1	Canada (British Columbia)	Hypoxytoma sp. (41194)
Tithonian - Neocomian	149.2 - 125.77	Canada (British Columbia)	Hypoxytoma sp. (41191)
Berriasian	143.1 - 137.05	Argentina	Oxytoma sp. (65424)
Coniacian	89.8 - 85.7	Canada (Alberta)	Pteria nebrascana (87508)
Middle Coniacian	89.8 - 85.7	Canada (Alberta)	Pteria nebrascana (87509 87510 87511 87512 87513 87514)
Coniacian - Santonian	89.8 - 83.6	Canada (Alberta)	Oxytoma nebrascana (87433 87569)
Middle Santonian	85.7 - 83.6	Canada (Alberta)	Pteria nebrascana (87515)
Santonian	85.7 - 83.6	USA (Wyoming)	Pteria nebrascana (87786)
Campanian	83.6 - 72.2	USA (Wyoming)	Oxytoma nebrascana (1619 1665) Pteria nebrascana (105717)
Campanian	83.6 - 72.2	Canada (Alberta)	Oxytoma nebrascana (87434)
Early/Lower Campanian	83.6 - 72.2	Canada (Alberta)	Oxytoma nebrascana (87452) Pteria nebrascana (82650 82651 82653 82654 82670 82672 82675 82679 89218)
Late/Upper Campanian	83.6 - 72.2	USA (Montana)	Pteria nebrascana (212997 213000 213003 213074)
Late/Upper Campanian	83.6 - 72.2	Canada (Alberta)	Oxytoma nebrascana (87440) Pteria nebrascana (82639)
Middle Campanian	83.6 - 72.2	Canada (Alberta)	Pteria nebrascana (82686)
Early/Lower Maastrichtian	72.2 - 66.0	USA (Wyoming)	Oxytoma nebrascana (1586)
Early/Lower Maastrichtian	72.2 - 66.0	Kazakhstan (Kustanai)	Oxytoma danica (186857)
Early/Lower Maastrichtian	72.2 - 66.0	Canada (Alberta)	Pteria nebrascana (82644 82645)
Early/Lower Maastrichtian	72.2 - 66.0	Canada (Saskatachewan)	Oxytoma nebrascana (234104)
Late/Upper Maastrichtian	72.2 - 66.0	Poland	Oxytoma danica (27818 27822 28078 28081 28082 28083)
Late/Upper Maastrichtian	72.2 - 66.0	USA (South Dakota)	Oxytoma nebrascana (88510 88511)
Late/Upper Maastrichtian	72.2 - 66.0	Kazakhstan (Kustanai)	Oxytoma danica (186858 186878)
Maastrichtian	72.2 - 66.0	Germany	Hypoxytoma danica (1318)
Maastrichtian	72.2 - 66.0	India	Hypoxytoma fallaciosa, Hypoxytoma semiglobosa (1351)
Maastrichtian	72.2 - 66.0	USA (North Dakota)	Hypoxytoma nebrascana (1339)
Maastrichtian	72.2 - 66.0	USA (Wyoming)	Oxytoma nebrascana (1583 1614)
Maastrichtian	72.2 - 66.0	USA (South Dakota)	Hypoxytoma nebrascana (1320)
Maastrichtian	72.2 - 66.0	Russian Federation	Hypoxytoma volgensis (1388)
Maastrichtian	72.2 - 66.0	Denmark	Hypoxytoma danica (1386)
Maastrichtian	72.2 - 66.0	USA (New Jersey)	Hypoxytoma abrupta (1313)
Maastrichtian	72.2 - 66.0	Poland	Hypoxytoma danica (1321)