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Tokarahia lophocephalus
Taxonomy
Mauicetus lophocephalus was named by Marples (1956). Its type specimen is UO DW1, a partial skull, and it is a 3D body fossil. Its type locality is Duntroon (Kokoamu Greensand), which is in a Duntroonian offshore shelf limestone in the Kokoamu Greensand Formation of New Zealand.
It was considered an invalid subgroup of Mauicetus by Fordyce (1991); it was considered an invalid subgroup of Eomysticetoidea by Steeman (2007); it was considered an invalid subgroup of Eomysticetidae by Fordyce and Roberts (2009); it was recombined as Tokarahia lophocephalus by Boessenecker and Fordyce (2015), Boessenecker and Fordyce (2017), Tsai and Kohno (2017).
It was considered an invalid subgroup of Mauicetus by Fordyce (1991); it was considered an invalid subgroup of Eomysticetoidea by Steeman (2007); it was considered an invalid subgroup of Eomysticetidae by Fordyce and Roberts (2009); it was recombined as Tokarahia lophocephalus by Boessenecker and Fordyce (2015), Boessenecker and Fordyce (2017), Tsai and Kohno (2017).
Synonymy list
| Year | Name and author |
|---|---|
| 1956 | Mauicetus lophocephalus Marples p. 577 figs. Plate 1 & Figs. 1-3 |
| 1967 | Mauicetus lophocephalus Harland et al. p. 774 |
| 1973 | Mauicetus lophocephalus Keyes p. 390 |
| 1980 | Mauicetus lophocephalus Fordyce p. iii figs. Table 2 |
| 2011 | Mauicetus lophocephalus Marx p. 83 figs. Figure 2 |
| 2015 | Tokarahia lophocephalus Boessenecker and Fordyce |
| 2017 | Tokarahia lophocephalus Boessenecker and Fordyce |
| 2017 | Tokarahia lophocephalus Tsai and Kohno |
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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.
†Tokarahia lophocephalus Marples 1956
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. W. Boessenecker and R. E. Fordyce 2015 | A species of Tokarahia differing from T. kauaeroa gen. et sp. nov. in possessing zygomatic processes that do not extend anterior to the occipital shield, more ex- tremely ‘telescoped’ nasal and premaxillae that pen- etrate the posterior half of the frontal, a tympanic bulla without a median furrow incised as a notch in the pos- terior margin of the tympanic bulla in dorsal view, more widely posteromedially divergent caudal tympanic process, a more deeply excavated pit on the lateral side of the anterior process, a fenestra rotunda that is more widely separated from the aperture for the cochlear aqueduct, lacking a finely sculptured tubercle immediately dorsal to the fenestra rotunda, and exhibiting a small vertebrarterial canal in the seventh cervical vertebra. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||
Age range: Duntroonian or 27.30000 to 25.20000 Ma
Collections (2 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Duntroonian | New Zealand (North Otago) | Mauicetus lophocephalus (type locality: 63049) | |
| Late/Upper Oligocene | New Zealand (South Island) | Tokarahia lophocephalus (173285) |