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Frisiphoca affine

Mammalia - Carnivora - Phocidae

Taxonomy
Monotherium affine was named by Vanden Broeck (1874) [No type specimen number listed by Van Beneden (1876).]. It is a 3D body fossil. Its type locality is Sablesmoyens d'Anvers, which is in a Tortonian lagoonal sandstone in the Diest Formation of Belgium.

It was recombined as Monatherium affine by Trouessart (1898) and Friant (1947); it was synonymized subjectively with Monotherium delognii by Kellogg (1922); it was misspelled as Monatherium affine by Trouessart (1904), Ray (1976), Koretsky (2001) and Koretsky and Domning (2014); it was considered a nomen dubium by Berta et al. (2015); it was recombined as Frisiphoca affine by Dewaele et al. (2018).

Synonymy list
YearName and author
1874Monatherium affinis Vanden Broeck p. 199
1874Monotherium affine Vanden Broeck p. 199
1876Monotherium affine Van Beneden p. 800
1898Monatherium affine Trouessart p. 380
1904Monatherium affine Trouessart p. 283
1947Monatherium affine Friant p. 5
1976Monotherium affine Ray p. 394
2001Monotherium affine Koretsky p. 86
2014Monotherium affine Koretsky and Domning p. 227
2018Frisiphoca affine Dewaele et al. p. 17

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RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
RankNameAuthor
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
subclassTribosphenida()
infraclassEutheria()
Placentalia
Laurasiatheria
Scrotifera
Ferae()
CarnivoramorphaWyss and Flynn 1993
CarnivoraformesFlynn et al.
orderCarnivoraBowditch 1821
superfamilyArctoideaFlower 1869
Pinnipedimorpha
Pinnipedia()
familyPhocidae
subfamilyPhocinae
genusFrisiphoca
speciesaffine()

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
ReferenceDiagnosis
L. Dewaele et al. 2018Large phocine, comparable in size to the leopard seal, Hydrurga leptonyx, and larger than all other extant and extinct Phocinae, except Erignathus barbatus. The humerus of Frisiphoca affine differs from Frisiphoca aberratum by the strong medial curvature of the distal portion of the humerus, the moderately deep olecranon fossa (shallow in F. aberratum), and the larger size (humerus of F. aberratum is 80.5% the size of the humerus of F. affine, see table 2). The presence of a well-developed supinator crest on the humerus is another difference between F. affine (present) and F. aberratum (absent), commonly observed among Phocinae.