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Pithanodelphis cornutus

Mammalia - Cetacea

Taxonomy
Phocaenopsis cornutus was named by Du Bus (1872). It is a 3D body fossil. Its type locality is Anvers, which is in a Miocene/Pliocene marine horizon in Belgium. It is the type species of Pithanodelphis.

It was recombined as Pithanodelphis cornutus by Abel (1905), Barnes (1985), Ichishima et al. (1995), Dawson (1996), Peredo et al. (2018) and Godfrey and Lambert (2023).

Synonymy list
YearName and author
1872Phocaenopsis cornutus Du Bus p. 500
1874Phocaenopsis cornutus Vanden Broeck p. 146
1898Phocaenopsis cornutus Trouessart p. 1043
1904Phocaenopsis cornutus Trouessart p. 769
1905Pithanodelphis cornutus Abel p. 142
1985Pithanodelphis cornutus Barnes p. 3
1995Pithanodelphis cornutus Ichishima et al. p. 487
1996Pithanodelphis cornutus Dawson p. 132
2018Pithanodelphis cornutus Peredo et al. p. 16 figs. Figure 10
2023Pithanodelphis cornutus Godfrey and Lambert p. 121

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
classMammalia
RankNameAuthor
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
Boreoeutheria
Laurasiatheria
Scrotifera
Euungulata
Artiodactylamorpha
Artiodactyla()
Whippomorpha
orderCetacea
Pelagiceti
Neoceti
suborderOdontoceti
infraorderDelphinida
genusPithanodelphis
speciescornutus()

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.

Pithanodelphis cornutus Du Bus 1872
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Diagnosis
ReferenceDiagnosis
S. J. Godfrey and O. Lambert 2023This small Ken- triodon pernix–size odontocete can be diagnosed on the basis of the following unique combination of characters: bizygomatic width ranging from 134 to 144 mm (but neither of the two cur- rently known specimens corresponds to a fully mature individ- ual); roughly symmetrical cranial vertex; inflated nasals elevated above other bones contributing to the vertex; exposure of each nasal on the vertex approximately as wide as it is long; interna- sal fossa moderately to deeply excavated; vertex conspicuously shortened anteroposteriorly; nasals contact or nearly contact the supraoccipital on either side of the frontals on the occipital face of the skull; maxilla-frontal contact either highly reduced or ab- sent superficially on the vertex; and small wedge-shaped frontals exposed on the vertex only between the nasals.
Pithanodelphis cornutus further diers from Sophianaecetus commenticius (Kazár, 2005, 2006) in that in the latter form, the nasals abut only anteriorly, they are not inflated, they are flat on top, and they exhibit only a faint anterolateral notch, whereas in the former, the nasals abut for almost half their length, they are inflated, they are convex dorsally, and they exhibit a prominent anterolateral notch. Unlike P. cornutus, S. commenticius does not appear to possess a posterior dorsal infraorbital foramen. In both P. cornutus and S. commenticius, the posterior margin of the maxilla is in direct contact with the supraoccipital.
Pithanodelphis cornutus diers from Atocetus iquensis and A. nasalis in that its nasals are not as inflated, the anterior mar- gin of each nasal is cut by a deep vertical notch, its nasals contact or nearly contact the supraoccipital (in Atocetus spp. they re- main distant), and the frontals gain more exposure (even more in the referred specimen) between the nasals on the vertex (in Ato- cetus spp. they only sliver their way between the nasals but also preclude the nasals from making contact with the supraoccipital; for a detailed comparison of Atocetus spp. with the lectotype of P. cornutus, see Barnes, 1985a; Muizon, 1988b).
Measurements
No measurements are available
Composition: hydroxyapatitesubo
Form: roller-shapedo
Ontogeny: modification of partso
Environment: marine, freshwatersubo
Locomotion: actively mobileo
Life habit: aquatico
Depth habitat: surfaceo
Diet: carnivoresubo
Reproduction: viviparoussubo
Created: 2005-03-06 14:21:39
Modified: 2005-09-22 15:42:08
Source: subo = suborder, o = order
Reference: Uhen 2004

Age range: base of the Serravallian to the top of the Late/Upper Pliocene or 13.82000 to 2.58800 Ma

Collections (4 total)


Time interval Ma Country or state Original ID and collection number
Langhian - Serravallian15.97 - 11.62USA (Maryland) Pithanodelphis cornutus (231780)
Middle Miocene - Early/Lower Pleistocene15.97 - 0.781Netherlands Pithanodelphis cornutus (189573)
Serravallian13.82 - 11.62USA (Maryland) Pithanodelphis cornutus (231783)
Late/Upper Miocene - Late/Upper Pliocene11.608 - 2.588Belgium (Antwerpen) Phocaenopsis cornutus (type locality: 47465)