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Taxonomy
Monotherium aberratum was named by Vanden Broeck (1874). 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 aberratum by Trouessart (1898), Trouessart (1904) and Friant (1947); it was considered a nomen dubium by Berta et al. (2015); it was recombined as Frisiphoca aberratum by Dewaele et al. (2018) and Berta et al. (2022).
It was recombined as Monatherium aberratum by Trouessart (1898), Trouessart (1904) and Friant (1947); it was considered a nomen dubium by Berta et al. (2015); it was recombined as Frisiphoca aberratum by Dewaele et al. (2018) and Berta et al. (2022).
Synonymy list
| Year | Name and author |
|---|---|
| 1874 | Monatherium aberratum Vanden Broeck p. 199 |
| 1874 | Monotherium aberratum Vanden Broeck p. 199 |
| 1876 | Monotherium aberratum Van Beneden p. 801 |
| 1898 | Monatherium aberratum Trouessart p. 380 |
| 1904 | Monatherium aberratum Trouessart p. 283 |
| 1922 | Monotherium aberratum Kellogg p. 113 |
| 1947 | Monatherium aberratum Friant p. 5 |
| 1972 | Monotherium aberratum Hendey p. 100 |
| 1976 | Monotherium aberratum Ray p. 394 |
| 2001 | Monotherium aberratum Koretsky p. 86 |
| 2003 | Monotherium aberratum Deméré et al. p. 63 |
| 2014 | Monotherium aberratum Koretsky and Domning p. 227 |
| 2018 | Frisiphoca aberratum Dewaele et al. p. 14 figs. Figure 4a–d, i–l |
| 2022 | Frisiphoca aberratum Berta et al. p. 6 figs. Table 1.1 |
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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.
†Frisiphoca aberratum Vanden Broeck 1874
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| L. Dewaele et al. 2018 | Identification as a phocid seal supported by the large development of the deltopectoral crest on the humerus. Identified as a phocine based on the presence of an entepicondylar foramen (also in Homiphoca capensis) and the overall slenderness. Differs from most Phocinae by having a very strongly reduced humeral neck (also in Histriophoca fasciata, Leptophoca proxima and Pagophilus groenlandicus). Differs from all Phocidae in the following unique combination of characteristics: lesser tubercle slightly below the level of the humeral head (also in Devinophoca emryi, Le. proxima, Monachopsis pontica, Nanophoca vitulinoides, Pachyphoca chapskii, Pachyphoca ukrainica, Praepusa vindobonensis, Properiptychus argentinus and Sarmatonectes sintsovi), transverse bar in bicipital groove (also in Lobodon carcinophaga, Monachus monachus, Ommatophoca rossii, Piscophoca pacifica and Pliophoca etrusca), deep fossa for m. triceps brachii distal to the humeral head (also in Pi. pacifica), and deltopectoral crest tapering smoothly distally (also in Australophoca changorum, Acrophoca longirostris, Cryptophoca maeotica, De. emryi, Kawas benegasorum, Messiphoca mauretanica, Mo. pontica, Pachyphoca chapskii, Pachyphoca ukrainica, Pi. pacifica, Pl. etrusca, Pra. vindobonensis, Prophoca rousseaui, Properiptychus argentinus and S. sintsovi).
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