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Megayoldia (Megayoldia)
Taxonomy
Megayoldia (Megayoldia) was named by Verrill and Bush (1897). It is extant.
It was assigned to Megayoldia by Verrill and Bush (1897).
It was assigned to Megayoldia by Verrill and Bush (1897).
Species lacking formal opinion data
Megayoldia arcuata, Megayoldia breviscapha, Megayoldia gratiosa, Megayoldia hayasakai, Megayoldia karaginskiensis, Megayoldia kilanskensis, Megayoldia lautenschlageri, Megayoldia moriyai, Megayoldia ogasawarai, Megayoldia olympiana, Megayoldia orientalis, Megayoldia scapha, Megayoldia sublischkei, Megayoldia subscapha, Megayoldia tokunagai, Megayoldia tokungai, Megayoldia tokungai, Megayoldia toyamaensis, Megayoldia triangula
Synonymy list
| Year | Name and author |
|---|---|
| 1897 | Megayoldia (Megayoldia) Verrill and Bush |
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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. Megayoldia (Megayoldia) Verrill and Bush 1897
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†Megayoldia (Megayoldia) thraciaeformis Storer 1838
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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]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy et al. 2009, Aberhan et al. 2004 | |||||
Age range
Maximum range based only on fossils: base of the Early/Lower Oligocene to the top of the Early/Lower Pliocene or 33.90000 to 3.60000 Ma
Minimum age of oldest fossil (stem group age): 27.3 Ma
Minimum age of oldest fossil (stem group age): 27.3 Ma
Collections (21 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Oligocene | USA (Alaska) | Yoldia thraciaeformis (192232) | |
| Rupelian | Russian Federation | Megayoldia thraciaeformis (49980) | |
| Rupelian - Aquitanian | Russian Federation | Megayoldia thraciaeformis (50079) | |
| Chattian | Russian Federation | Yoldia suavis (50081 50178) | |
| Late/Upper Oligocene | Russian Federation | Megayoldia thraciaeformis (70475) | |
| Aquitanian - Burdigalian | Russian Federation | Megayoldia thraciaeformis (50041) | |
| Early/Lower Miocene | Russian Federation | Megayoldia thraciaeformis (70448) | |
| Burdigalian | Russian Federation | Megayoldia thraciaeformis (50179) | |
| Langhian - Serravallian | Russian Federation | Megayoldia thraciaeformis (50037 50038) | |
| Middle Miocene | Russian Federation | Megayoldia thraciaeformis (70568) | |
| Langhian - Tortonian | Russian Federation | Megayoldia thraciaeformis (50048) | |
| Late/Upper Miocene | Russian Federation | Megayoldia thraciaeformis (70473 70476 70479 70519 70533 70567) | |
| Early/Lower Pliocene | Russian Federation | Megayoldia thraciaeformis (50042) | |
| Pliocene | Japan | Portlandia thraciaeformis (97086) |