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Megayoldia

Bivalvia - Nuculanida - Sareptidae

Taxonomy
Megayoldia was named by Verrill and Bush (1897) [Sepkoski's age data: T Ol R Sepkoski's reference number: 816]. It is extant.

It was reranked as Yoldia (Megayoldia) by Zhidkova (1968), Moore (1983).

It was assigned to Yoldia by Zhidkova (1968), Moore (1983); to Yoldiinae by Coan et al. (2000); to Nuculoida by Sepkoski (2002); and to Yoldiidae by Mikkelsen (2006).

Synonymy list
YearName and author
1897Megayoldia Verrill and Bush
1968Yoldia (Megayoldia) Zhidkova p. 78
1983Yoldia (Megayoldia) Moore p. A26
2000Megayoldia Coan et al. pp. 109, 114
2002Megayoldia Sepkoski
2006Megayoldia Mikkelsen

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
RankNameAuthor
—Eubivalvia
subclassProtobranchia(Pelseneer 1889)
superorderNuculaniformiiCarter et al. 2000
orderNuculanida(Carter et al. 2000)
superfamilyNuculanoideaAdams and Adams 1858
familySareptidaeAdams 1860
subfamilyYoldiinae(Dall 1908)
genusMegayoldiaVerrill and Bush 1897

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. Megayoldia Verrill and Bush 1897
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Subg. Megayoldia (Megayoldia) Verrill and Bush 1897
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Invalid names: Microyoldia ochotensis Scarlato 1981 [synonym], Nucula groenlandica Posselt 1898 [synonym], Nucula navicularis Couthouy 1831 [synonym], Portlandia dalli Krause 1885 [synonym], Yoldia angularis Möller 1842 [synonym], Yoldia regularis Verrill 1884 [synonym], Yoldia scapha Yokoyama 1926 [synonym], Yoldia secunda Dall 1916 [synonym], Yoldia suavis Konova 1984 [synonym]
Subg. †Megayoldia (Portlandella) Stewart 1930
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Invalid names: Yoldia obtusata Kristofovich 1984 [synonym]
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Invalid names: Yoldia deformis Kogan 1939 [synonym]
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Invalid names: Megayoldia kamchatkana Scarlato 1981 [synonym], Yoldia beringiana Dall 1916 [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

Maximum range based only on fossils: base of the Maastrichtian to the top of the Piacenzian or 72.20000 to 2.58000 Ma
Minimum age of oldest fossil (stem group age): 66.0 Ma

Collections (65 total)


Time interval Ma Country or state Original ID and collection number
Maastrichtian72.2 - 66.0Serbia Yoldia obtusata (1380)
Danian - Thanetian66.0 - 56.0Russian Federation M. kilanskensis, M. moriyai (50039)
Thanetian59.24 - 56.0Russian Federation Portlandella kilanskensis (162250)
Early/Lower Eocene56.0 - 48.07Russian Federation M. watasei (70564)
Ypresian - Lutetian56.0 - 41.03Russian Federation (Kamchatka) Portlandella kilanskiensis (202262)
Eocene56.0 - 33.9Russian Federation M. kilanskensis, M. breviscapha, M. watasei (50129)
Lutetian - Bartonian48.07 - 37.71Russian Federation M. ogasawarai, M. watasei (50051)
Lutetian - Priabonian48.07 - 33.9Russian Federation M. watasei (50136)
Bartonian - Priabonian41.03 - 33.9Russian Federation M. watasei (50040 50151)
Late/Upper Eocene37.71 - 33.9Russian Federation Yoldia watasei (45449)
Early/Lower Oligocene33.9 - 27.3Russian Federation M. toyamaensis (70518) M. watasei (70445) Yoldia watasei (45430) Yoldia watasei, Yoldia deformis (45429)
Early/Lower Oligocene33.9 - 27.3USA (Alaska) Yoldia thraciaeformis (192232)
Rupelian33.9 - 27.3Russian Federation M. tokunagai, M. watasei, M. thraciaeformis, M. pilvoensis, Yoldia obtusata (49980) M. watasei (49975)
Oligocene33.9 - 23.04Russian Federation M. tokunagai, M. watasei (50122) M. watasei (49974 50121)
Rupelian - Aquitanian33.9 - 20.45Russian Federation M. arcuata, M. orientalis, M. triangula, M. thraciaeformis (50079)
Chattian27.3 - 23.04Russian Federation M. scapha, Yoldia suavis (50081 50178)
Chattian27.3 - 23.04USA (Washington) Yoldia reagani (52362 52363)
Late/Upper Oligocene27.3 - 23.04Panama Portlandia euthynta (92982)
Late/Upper Oligocene27.3 - 23.04Russian Federation M. gratiosa, M. tokunagai, M. watasei, M. thraciaeformis (70475) M. watasei, Yoldia deformis (70459)
Chattian - Aquitanian27.3 - 20.45Russian Federation M. arcuata, M. watasei (50123)
Aquitanian - Burdigalian23.04 - 15.98Russian Federation M. orientalis, M. thraciaeformis (50041) M. watasei (50050)
Early/Lower Miocene23.04 - 15.98Japan M. hayasakai, M. tokungai (70423) Portlandia watasei (173022)
Early/Lower Miocene23.04 - 15.98Russian Federation M. olympiana (70560) M. thraciaeformis (70448)
Burdigalian20.45 - 15.98Russian Federation M. thraciaeformis (50179)
Burdigalian20.45 - 15.98Japan M. watasei (203413)
Langhian15.98 - 13.82Japan (Toyama) Portlandia lischkei (219252)
Langhian - Serravallian15.98 - 11.63Russian Federation M. sublischkei, M. karaginskiensis, M. thraciaeformis (50038) M. thraciaeformis (50037)
Middle Miocene15.98 - 11.63Russian Federation M. thraciaeformis (70568)
Langhian - Tortonian15.98 - 7.246Russian Federation M. karaginskiensis, M. orientalis, M. thraciaeformis (50048)
Late/Upper Miocene11.63 - 5.333Russian Federation M. thraciaeformis (70473 70476 70479 70519 70533) M. tokunagai, M. subscapha, M. pilvoensis (70465) M. tokunagai, M. toyamaensis, M. thraciaeformis (70567) M. tokungai, M. lautenschlageri (70532)
Early/Lower Pliocene5.333 - 3.6Russian Federation M. karaginskiensis, M. thraciaeformis (50042)
Pliocene5.333 - 2.58USA (Alaska) Yoldia montereyensis (112321)
Pliocene5.333 - 2.58Japan Portlandia thraciaeformis (97086) Portlandia toyamaensis (97075 97076 97078 97082)
Late/Upper Pliocene3.6 - 2.58USA (California) Yoldia beringiana (238418 238435 238436 238455 238458 238612)
Piacenzian3.6 - 2.58Japan Portlandia japonica (97077)