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Taxonomy
Megaptera miocaena was named by Kellogg (1922). Its type specimen is USNM 10300, a skull, and it is a 3D body fossil. Its type locality is Lompoc Quarry, which is in a Tortonian basinal (siliciclastic) diatomite in the Monterey Formation of California.
It was considered an invalid subgroup of Megaptera by Marx and Fordyce (2015); it was considered an invalid subgroup of Balaenopteridae by Tsai and Boessenecker (2017); it was recombined as Norrisanima miocaena by Leslie et al. (2019).
It was considered an invalid subgroup of Megaptera by Marx and Fordyce (2015); it was considered an invalid subgroup of Balaenopteridae by Tsai and Boessenecker (2017); it was recombined as Norrisanima miocaena by Leslie et al. (2019).
Synonymy list
| Year | Name and author |
|---|---|
| 1922 | Megaptera miocaena Kellogg p. 3 figs. Plates 1-4, Figs. 1-10 |
| 1930 | Megaptera miocaena Hay p. 575 |
| 1938 | Megaptera miocaena Abel p. 9 |
| 1977 | Megaptera miocaena Barnes p. 328 figs. Table 4 |
| 2005 | Megaptera miocaena Deméré et al. p. 122 |
| 2011 | Megaptera miocaena Marx p. 83 figs. Figure 2 |
| 2019 | Norrisanima miocaena Leslie et al. p. 6 |
| 2020 | Megaptera miocaena Lloyd and Slater |
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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.
†Norrisanima miocaena Kellogg 1922
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. S. Leslie et al. 2019 | N. miocaena is a stem balaenopteroid that possesses the following autapomorphies: the lateral margins of the nasal are parallel; spreading of the anterolateral portion of the parietal on to the posteromedial corner of the supraorbital process of the frontal; the anteriormost point of the supraoccipital in dorsal view is in line with the anterior half or anterior edge of the supraorbital process; the zygomatic process of the squamosal is distinctly higher dorsoventrally than wide transversely; having a squared anterior apex of the supraoccipital shield; the tip of the postglenoid process pointing ventrally in lateral view, lacking a distinct ridge delimiting the insertion surface of the tensor tympani on medial side of the anterior process of the periotic; and having a superior process of the periotic present as a distinct crest forming the lateral wall of the suprameatal fossa. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||
Age range: base of the Late/Upper Miocene to the top of the Tortonian or 11.60800 to 7.24600 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Tortonian | USA (California) | Megaptera miocaena (type locality: 45489) | |
| Late/Upper Miocene | Japan (Akita) | Megaptera miocaena (76008) |