PBDB Taxon

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

Nemocardium (Nemocardium) yokoyamai

Bivalvia - Cardiida - Cardiidae

Taxonomy

Nemocardium yokoyamai was named by Takeda (1953) [DISTRIBUTION: Late Eocene; Japan.]. It is not a trace fossil.

It was recombined as Nemocardium (Nemocardium) yokoyamai by Kafanov et al. (2005).

Sister species lacking formal opinion data

Cardium beckei, Cardium indistinctum, N. actium, N. birdanum, N. brabanticum, N. carteri, N. ciplyense, N. curtum, N. edwardsi, N. ezaoense, N. fenestratum, N. finlayi, N. gambrinum, N. harrisi, N. honi, N. kyushuensis, N. lobulatum, N. lundgreni, N. mokattamensis, N. nodaense, N. polyptyctum, N. quihi, N. samarangae, N. semidecussatum, N. semigranulatum, N. superbum, N. takaradaiense, N. tauricum, N. tristiculum, N. variolarius, N. vogeli, N. ezoensis, N. yokoymai, N. dicrepans, N. bunburyi, N. musperi, N. parvulum, N. rutteni, N. spondyloides, N. subturgidum, N. samarangae, N. doelense, N. carteri, N. fenestratum, N. italicum, N. iwakiense, N. jogjacartense, N. khomenkoi, N. koshikijimense, N. kovatschense, N. parahilliana, N. quaasi, N. yatsushiroense, N. arnhemense, N. catinus, N. marwicki, N. proterothetidis

Entered

by A. Hendy on 2007-03-22

Synonymy list

Year	Name and author
1953	Nemocardium yokoyamai Takeda
2005	Nemocardium (Nemocardium) yokoyamai Kafanov et al. p. 6

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Bivalvia
subclass	Autobranchia	(Groblen 1894)
infraclass	Heteroconchia	(Gray 1854)
—	Euheterodonta	Giribet and Distel 2003

Rank	Name	Author
superorder	Imparidentia	Bieler 2014
order	Cardiida	Ferussac 1822
superfamily	Cardioidea	(Lamarck 1809)
family	Cardiidae	Lamarck 1809
—	Neocardiids
—	Eucardiids	Schneider 1995
subfamily	Fraginae	Stewart 1930
genus	Nemocardium	Meek 1876
subgenus	Nemocardium	Meek 1876
species	yokoyamai	(Takeda 1953)

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.

†Nemocardium (Nemocardium) yokoyamai Takeda 1953

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Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

aragonitec

Locomotion:

facultatively mobilef

Life habit:

infaunalf

Diet:

suspension feederf

Vision:

blindc

Created:

2009-07-04 09:31:14

Modified:

2009-08-17 22:21:59

Source: f = family, c = class

References: Todd 2001, Aberhan et al. 2004

Age range: base of the Early/Lower Eocene to the top of the Serravallian or 56.00000 to 11.63000 Ma

Collections (9 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Eocene	56.0 - 48.07	Russian Federation	Nemocardium yokoyamai (70564)
Lutetian - Bartonian	48.07 - 37.71	Russian Federation	Nemocardium yokoyamai (50051)
Late/Upper Eocene	37.71 - 33.9	Japan	Nemocardium yokoyamai (70424)
Early/Lower Oligocene	33.9 - 27.3	Russian Federation	Nemocardium yokoyamai (70445 70463)
Late/Upper Oligocene	27.3 - 23.04	Russian Federation	Nemocardium yokoyamai (70475)
Early/Lower Miocene	23.04 - 15.98	Japan	Nemocardium yokoyamai (70423)
Langhian - Serravallian	15.98 - 11.63	Russian Federation	Nemocardium yokoyamai (50037 50038)