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Cammackacetus hazenorum

Mammalia - Cetacea

Taxonomy
Cammackacetus hazenorum was named by Godfrey and Lambert (2023). Its type specimen is USNM PAL 639715, a partial skull (partial skull lacking the distal part of the rostrum, the supra- orbital processes, most of the squamosals, and the ear bones), and it is a 3D body fossil. Its type locality is Governor Run, Zone 24, which is in a Tortonian marine horizon in the St. Marys Formation of Maryland. It is the type species of Cammackacetus.

Synonymy list
YearName and author
2023Cammackacetus hazenorum Godfrey and Lambert p. 142 figs. FIGURES 2.55, 2.56

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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
genusCammackacetus
specieshazenorum

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.

Cammackacetus hazenorum Godfrey and Lambert 2023
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Diagnosis
ReferenceDiagnosis
S. J. Godfrey and O. Lambert 2023Robust delphinidan char- acterized by the following unique combination of characters: massive, transversely and dorsoventrally thick premaxillae at mid-length of rostrum; no significant constriction of the lateral margins of premaxillae in rostrum base; slightly transversely concave premaxillary sac fossae; well-developed premaxillary crest lateral to the posterior margin of the bony nares, with a prominent dorsolateral corner; reduced contact between pre- maxilla and nasal along anterolateral corner of the latter; mini- mum width of vertex greater than width of bony nares; nasal wider than long; lateral margins of nasals diverging posterolater- ally; dorsal surface of nasal sloping markedly anteroventrally; frontal wider than nasal on vertex and reaching a slightly higher level; nuchal crest barely anteriorly projected, with supraoccipi- tal shield only a little exposed in dorsal view; occipital shield inflated, being dorsoventrally convex; temporal crests converg- ing ventromedially in posterior view; large maxillary alveoli, up to 17 mm in transverse diameter; W-shaped palatine-maxilla su- tures with posteromedial exposure of maxillae between apices of palatines; pterygoid sinus fossa reaching the level of the ant- orbital notch; and fossa for the postorbital lobe of the pterygoid sinus being very deep and posteriorly defined by a high crest.
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: Tortonian or 11.62000 to 7.24600 Ma

Collections: one only


Time interval Ma Country or state Original ID and collection number
Tortonian11.62 - 7.246USA (Maryland) Cammackacetus hazenorum (type locality: 231781)