PBDB Taxon

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

Megayoldia (Portlandella) watasei

Bivalvia - Nuculanida - Sareptidae

Taxonomy

Yoldia watasei was named by Kanehara (1937) [DISTRIBUTION: Cenozoic; North Pacific.]. It is not a trace fossil.

It was recombined as Yoldia (Portlandella) watasei by Sinelnikova (1991); it was recombined as Megayoldia (Portlandella) watasei by Kafanov et al. (2001).

Sister species lacking formal opinion data

M. gratiosa, M. tokunagai, M. tokungai, M. hayasakai, M. tokungai, M. arcuata, M. breviscapha, M. karaginskiensis, M. kilanskensis, M. lautenschlageri, M. moriyai, M. ogasawarai, M. olympiana, M. orientalis, M. scapha, M. sublischkei, M. subscapha, M. toyamaensis, M. triangula, Portlandella kilanskensis, Portlandella kilanskiensis, Portlandia japonica, Portlandia lischkei, Portlandia toyamaensis

Synonyms

Yoldia deformis was named by Kogan (1939) [DISTRIBUTION: Cenozoic; North Pacific.]. It is not a trace fossil.

It was synonymized subjectively with Megayoldia (Portlandella) watasei by Kafanov et al. (2001).

Synonymy list

Year	Name and author
1937	Yoldia watasei Kanehara
1939	Yoldia deformis Kogan
1991	Yoldia (Portlandella) watasei Sinelnikova p. 152
2001	Megayoldia (Portlandella) watasei Kafanov et al.

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Rank	Name	Author
kingdom	Animalia	()
—	Bilateria
—	Eubilateria	Ax 1987
—	Protostomia
—	Spiralia
superphylum	Lophotrochozoa
phylum	Mollusca
class	Bivalvia
—	Eubivalvia

Rank	Name	Author
subclass	Protobranchia	(Pelseneer 1889)
superorder	Nuculaniformii	Carter et al. 2000
order	Nuculanida	(Carter et al. 2000)
superfamily	Nuculanoidea	Adams and Adams 1858
family	Sareptidae	Adams 1860
subfamily	Yoldiinae	(Dall 1908)
genus	Megayoldia	Verrill and Bush 1897
subgenus	Portlandella	()
species	watasei	(Kanehara 1937)

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.

†Megayoldia (Portlandella) watasei Kanehara 1937

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Invalid names: Yoldia deformis Kogan 1939 [synonym]

Diagnosis

No diagnoses are available

Measurements

No measurements are available

Composition:

aragonitec

Locomotion:

facultatively mobilef

Life habit:

infaunalf

Diet:

deposit feederf

Vision:

blindc

Created:

2009-08-18 18:13:31

Modified:

2009-08-18 20:13:31

Source: f = family, c = class

References: Aberhan et al. 2004, Hendy et al. 2009

Age range: base of the Early/Lower Eocene to the top of the Burdigalian or 56.00000 to 15.98000 Ma

Collections (21 total)

Time interval	Ma	Country or state	Original ID and collection number
Early/Lower Eocene	56.0 - 48.07	Russian Federation	Megayoldia watasei (70564)
Eocene	56.0 - 33.9	Russian Federation	Megayoldia watasei (50129)
Lutetian - Bartonian	48.07 - 37.71	Russian Federation	Megayoldia watasei (50051)
Lutetian - Priabonian	48.07 - 33.9	Russian Federation	Megayoldia watasei (50136)
Bartonian - Priabonian	41.03 - 33.9	Russian Federation	Megayoldia watasei (50040 50151)
Late/Upper Eocene	37.71 - 33.9	Russian Federation	Yoldia watasei (45449)
Early/Lower Oligocene	33.9 - 27.3	Russian Federation	Megayoldia watasei (70445) Yoldia watasei (45430) Yoldia watasei, Yoldia deformis (45429)
Rupelian	33.9 - 27.3	Russian Federation	Megayoldia watasei (49975 49980)
Oligocene	33.9 - 23.04	Russian Federation	Megayoldia watasei (49974 50121 50122)
Late/Upper Oligocene	27.3 - 23.04	Russian Federation	Megayoldia watasei (70475) Megayoldia watasei, Yoldia deformis (70459)
Chattian - Aquitanian	27.3 - 20.45	Russian Federation	Megayoldia watasei (50123)
Aquitanian - Burdigalian	23.04 - 15.98	Russian Federation	Megayoldia watasei (50050)
Early/Lower Miocene	23.04 - 15.98	Japan	Portlandia watasei (173022)
Burdigalian	20.45 - 15.98	Japan	Megayoldia watasei (203413)