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Matapanui waihao
Taxonomy
Matapa waihao was named by Boessenecker and Fordyce (2017). Its type specimen is OU 12918, a partial skeleton (partial immature cranium with associated left and right tympanoperiotics, mandibles, atlas, axis, cervical and thoracic vertebrae, ribs, and fragmentary scapula), and it is a 3D body fossil. Its type locality is J40/f70 - Waihao River [Kokoamu Greensand], which is in a Whaingaroan coastal sandstone in the Kokoamu Greensand Formation of New Zealand.
It was recombined as Matapanui waihao by Boessenecker and Fordyce (2017), Tsai and Kohno (2017), Fordyce and Marx (2018), Robinson et al. (2024).
It was recombined as Matapanui waihao by Boessenecker and Fordyce (2017), Tsai and Kohno (2017), Fordyce and Marx (2018), Robinson et al. (2024).
Synonymy list
| Year | Name and author |
|---|---|
| 2017 | Matapa waihao Boessenecker and Fordyce |
| 2017 | Matapanui waihao Boessenecker and Fordyce |
| 2017 | Matapanui waihao Tsai and Kohno |
| 2018 | Matapanui waihao Fordyce and Marx p. 5 figs. Fig. 4 |
| 2024 | Matapanui waihao Robinson et al. p. 577 |
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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.
†Matapanui waihao Boessenecker and Fordyce 2017
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| R. W. Boessenecker and R. E. Fordyce 2017 | Matapa waihao is a small mysticete (5 6 m estimated body length, based on exoccipital width of OU 22742 in comparison with Tokarahia kauaeroa). Archaic features differing from crown Mysticeti include: an ante- roposteriorly thickened paroccipital process, narrower exposure of the squamosal lateral to the exoccipital in posterior view, distinct glenoid fossa, secondary squamosal fossa, unfused tympanoperiotics, well-differentiated medial and lateral lobes of the tympanic bulla, horizontal cleft of sigmoid fissure, horizontal crest positioned on posterior surface of medial lobe, tympanic cavity divided by transverse ridge, prominent elliptical foramen and separated inner and outer posterior pedicles, mandible with large mandibular foramen, and anteroposteriorly thick cervical vertebrae. Matapa waihao differs from archaeocetes and all toothed mysticetes in possessing an orbitotemporal crest positioned entirely dorsally, and kinetic premaxilla maxilla contact; from all other Eomysticetidae in possessing a premaxilla extending further posterior than the nasal and anterolaterally convex subtemporal crest; from Eomysticetus and Micromysticetus rothauseni in possessing an anteroposteriorly broader supraorbital process of the frontal and a triangular anterior process; from Eomysticetus and Yamatocetus in possessing a lanceolate mandibular terminus; from Tohoraata, Tokarahia and Waharoa in possessing a squamosal prominence, a concave anterodorsal margin of the anterior process, a double-faced posterior bullar facet of the periotic with longitudinal creases, a proportionally small stapedial muscle fossa, an elongate caudal tympanic process, and lacking supraorbital foramina. Matapa waihao further differs from Tokarahia and Waharoa in possessing an anteroposteriorly longer anterior process of the periotic. |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||
Age range: Whaingaroan or 34.60000 to 27.30000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Whaingaroan | New Zealand (South Canterbury) | Matapa waihao (type locality: 179790) |