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Nihoroa
Taxonomy
Nihoroa was named by Coste et al. (2024).
It was assigned to Odontoceti by Coste et al. (2024); and to Waipatiidae by Robinson et al. (2024).
It was assigned to Odontoceti by Coste et al. (2024); and to Waipatiidae by Robinson et al. (2024).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 2024 | Nihoroa Coste et al. p. 740 |
| 2024 | Nihoroa Robinson et al. p. 579 |
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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.
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| A. Coste et al. 2024 | Nihoroa reimaea is a gracile, longirostrine, polydont, heterodont odontocete (Figure 2). Its long rostrum carries long, procumbent anterior tusk-like teeth and small, slightly den- ticulate cheek teeth. The premaxilla forms the anterior 30% of the dorsoventrally com- pressed rostrum. It has asymmetrical antorbital notches and a short, rounded cranium. Its premaxilla extends along 84% of the condylobasal length (CBL), with long thin splint-like extensions reaching past the posterior margin of the nasals. The crowns of the first incisors (I1) are over 1.75 times the length of the second incisors (I2) on either side. It has a narrow mesorostral groove and wide maxillary flanges. N. reimaea differs from Waipatia maerewhenua (Fordyce 1994) in having a much smaller cranium (172 mm wide and 153 mm long, versus Waipatia’s 246 mm long and 251 mm wide). N. reimaea also has a narrower more dorsoventrally flattened rostrum and less differentiated cheek teeth than W. maerewhenua. N. reimaea differs from Ote- kaikea (Tanaka and Fordyce 2014, 2015b) in having a lower vertex, less expanded pre- maxilla on the face and a broader posterior process of the periotic. N. reimaea differs from Ediscetus (Albright et al. 2018) in having a less pronounced intertemporal constric- tion, a lower temporal crest, less inflated premaxilla and quadrangular nasals rather than triangular. N. reimaea differs from Nihohae matakoi (Coste et al. 2023) in having fewer tusk-like teeth, shorter I2 and I3s, a less pronounced intertemporal constriction, an ante- roposteriorly shorter vertex and more rounded zygomatic processes which reach further forward towards the postorbital processes. N. reimaea has an alveolar groove with indis- tinct interalveolar septa and likely had over 20 teeth per quadrant in comparison to Nihohae matakoi’s 17 teeth per quadrant. Compared to Nihohae matakoi, N. reimaea has a more rectangular pars cochlearis of the periotic and has an anterior incipient spine on the tympanic bulla. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||