Platyosphys

Platyosphys is a genus of basilosaurid from Middle Eocene (Bartonian) of the eastern United States and Ukraine.

Platyosphys
Temporal range: Bartonian[1]
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Infraorder: Cetacea
Family: †Basilosauridae
Subfamily: †Basilosaurinae
Genus: †Platyosphys
Kellogg, 1936
Species
  • P. paulsoni (Brandt, 1873) (type)
  • P. einori Gritsenko, 2001
  • P. uheni? (Gol'din and Zvonok, 2013)
  • P. wardii? (Uhen, 1999)
Synonyms

Basilotritus? Gol'din and Zvonok, 2013

Taxonomy

The type species, Platyosphys paulsoni, was originally described as Zeuglodon paulsoni in 1873 on the basis of several vertebrae from a Bartonian-age horizon in southern Ukraine.[2] In his 1936 monograph regarding Archaeoceti, Remington Kellogg recognized the distinct nature of the taxon and coined the new genus Platyosphys for Z. paulsoni.[3] Another new species of Platyosphys, P. einori, was coined for vertebrae, a scapula, and rib fragments in 2001.[4]

In the original description of Basilotritus, Platyosphys and its constituent species were considered nomina dubia because their material was considered insufficiently diagnostic to generic or specific level.[5] However, a 2015 paper describing archaeocetes from the Western Sahara described a new species, P. aithai, and reiterated the diagnostic nature of the type species of Platyosphys, suggesting that Basilotritus might be a synonym of Platyosphys.[6] Platosphys aithai was renamed Antaecetus by Gingerich et al. (2022), who also made Pachycetus robustus a junior synonym of paulsonii along with Platyosphys einori to create the new combination Pachycetus paulsonii, making paulsonii the epithet of the Pachycetus type species.[7]

References
  1. "PBDB". paleobiodb.org. Retrieved 5 September 2021.
  2. J. F. Brandt. 1873. Uber bisher in Russland gefundene Reste von Zeuglodonten. Melanges biologiques Bulletin de l'Academie imperials des Sciences de St. Petersbourg 9:111-112
  3. R. Kellogg. 1936. A Review of the Archaeoceti. Carnegie Institution of Washington 482:1-366
  4. V. Gritsenko. 2001. New species Platiosphys [Platyosphys] einori (Archaeoceti) from Oligocenic deposits of Kyiv. Visnyk Heolohila Kyivskyi Natsionalyi Universytet Imeni Tarasa Shevchenka 20:17-20
  5. Pavel Gol'din and Evgenij Zvonok (2013). "Basilotritus uheni, a New Cetacean (Cetacea, Basilosauridae) from the Late Middle Eocene of Eastern Europe". Journal of Paleontology 87 (2): 254–268. doi:10.1666/12-080R.1.
  6. Philip D. Gingerich and Samir Zouhri (2015). "New fauna of archaeocete whales (Mammalia, Cetacea) from the Bartonian middle Eocene of southern Morocco". Journal of African Earth Sciences 111: 273–286. doi:10.1016/j.jafrearsci.2015.08.006.
  7. Gingerich PD, Amane A, Zouhri S (2022) Skull and partial skeleton of a new pachycetine genus (Cetacea, Basilosauridae) from the Aridal Formation, Bartonian middle Eocene, of southwestern Morocco. PLoS ONE 17(10): e0276110. doi:10.1371/journal.pone.0276110


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