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Taxonomy
Ostrea megodon was named by Hanley (1846). It is extant. Its type specimen is ANSP 4494, a shell.
It was recombined as Ostrea (Alectryonia) megadon by Olsson (1964); it was recombined as Ostrea (Lopha) megadon by Keen (1971); it was recombined as Ostrea (Agerostrea) megadon by Hertlein and Grant (1972) and Smith (1984); it was recombined as Agerostrea megadon by Bernard (1983); it was recombined as Ostreola megodon by Moore (1987); it was recombined as Undulostrea megodon by Coan and Valentich-Scott (2012), Raith et al. (2016), Hendy (2021).
It was recombined as Ostrea (Alectryonia) megadon by Olsson (1964); it was recombined as Ostrea (Lopha) megadon by Keen (1971); it was recombined as Ostrea (Agerostrea) megadon by Hertlein and Grant (1972) and Smith (1984); it was recombined as Agerostrea megadon by Bernard (1983); it was recombined as Ostreola megodon by Moore (1987); it was recombined as Undulostrea megodon by Coan and Valentich-Scott (2012), Raith et al. (2016), Hendy (2021).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1846 | Ostrea megodon Hanley p. 106 |
| 1846 | Ostrea gallus Valenciennes figs. pl. 21, fig. 12 |
| 1866 | Ostrea cerrosensis Gabb p. 35 figs. pl. 11, fig. 61 |
| 1922 | Ostrea megodon Olsson p. 195 |
| 1926 | Ostrea megodon Jordan and Hertlein p. 427 |
| 1929 | Ostrea megodon Anderson p. 154 |
| 1930 | Ostrea megadon Stewart p. 130 |
| 1930 | Ostrea megadon cerrosensis Stewart p. 130 figs. Plate 14, fig. 1 |
| 1931 | Ostrea megodon Grant, IV and Gale p. 150 |
| 1950 | Ostrea megodon Durham p. 59 |
| 1964 | Ostrea (Alectryonia) megadon Olsson p. 35 |
| 1971 | Ostrea (Lopha) megadon Keen p. 84 |
| 1972 | Ostrea (Agerostrea) megadon Hertlein and Grant pp. 221-222 |
| 1983 | Agerostrea megadon Bernard p. 23 |
| 1984 | Ostrea (Agerostrea) megadon Smith p. 206 |
| 1987 | Ostreola megodon Moore p. 29 |
| 2012 | Undulostrea megodon Coan and Valentich-Scott p. 238 |
| 2016 | Undulostrea megodon Raith et al. p. 265 |
| 2021 | Undulostrea megodon Hendy |
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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.
Undulostrea megodon Hanley 1846 [arc oyster]
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Invalid names: Ostrea cerrosensis Gabb 1866 [synonym], Ostrea gallus Valenciennes 1846 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: g = genus, f = family, c = class | |||||
| References: Kiessling 2003, Aberhan et al. 2004, Hendy et al. 2009 | |||||
Age range: base of the Middle Eocene to the top of the Late/Upper Pleistocene or 48.07000 to 0.01170 Ma
Collections (38 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Eocene - Early/Lower Oligocene | Haiti | Ostrea megodon (173456) | |
| Late/Upper Miocene | Colombia | Undulostrea megodon (131219 131220) | |
| Early/Lower Pliocene | Costa Rica | Ostrea megodon (134655) | |
| Early/Lower Pliocene | Mexico (Baja California Sur) | Ostrea megodon (43845 43846 43847 43946 44042) | |
| Early/Lower Pliocene | Ecuador (Esmeraldas) | Undulostrea megodon (135043) | |
| Early/Lower Pliocene | Ecuador (Manabi) | Ostrea megodon (60772) | |
| Pliocene | Mexico (Baja California) | Ostrea megodon (97124 97127 97129) | |
| Pliocene | Chile (Antofagasta) | Undulostrea megodon (96707) | |
| Pliocene | Ecuador | Ostrea megodon (96596) | |
| Pliocene | Mexico (Sonora) | Ostrea megodon (96564) | |
| Pliocene | Ecuador (Manabi) | Ostrea megodon (51884 51886 51887) | |
| Pliocene | Costa Rica | Ostrea megodon (66791) | |
| Pliocene | Mexico (Baja California Sur) | Ostrea cerrosensis (43685 43688) Ostrea megodon (43680) | |
| Late/Upper Pliocene | Peru | Ostrea megadon (97650) | |
| Piacenzian | Costa Rica | Ostrea megodon (134664) | |
| Piacenzian | Panama | Ostrea megodon (134663) | |
| Piacenzian - Gelasian | Ecuador (Manabi) | Ostrea megodon (51878) | |
| Early/Lower Pleistocene | Peru | Ostrea megadon (97649) | |
| Early/Lower Pleistocene - Middle Pleistocene | Peru | Ostrea megadon (96897) | |
| Pleistocene | Mexico (Baja California) | Ostrea megodon (96594) | |
| Pleistocene | Mexico (Baja California Sur) | Ostrea megodon (96586) | |
| Pleistocene | Ecuador | Undulostrea megodon (62040) | |
| Pleistocene | Peru | Ostrea megodon (207003 207004 207005) | |
| Late/Upper Pleistocene | USA (California) | Ostrea megodon (160361) | |
| Late/Upper Pleistocene - Holocene | Panama (Panama) | Undulostrea megodon (160394) |