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Pachycetinae
Taxonomy
Pachycetinae was named by Gingerich et al. (2022).
It was assigned to Basilosauridae by Gingerich et al. (2022), van Vliet et al. (2023) and van Vliet et al. (2024).
It was assigned to Basilosauridae by Gingerich et al. (2022), van Vliet et al. (2023) and van Vliet et al. (2024).
Synonymy list
Year | Name and author |
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2022 | Pachycetinae Gingerich et al. p. 12 |
2023 | Pachycetinae van Vliet et al. p. 7 |
2024 | Pachycetinae van Vliet et al. p. 6 |
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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.
Subfm. †Pachycetinae Gingerich et al. 2022
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G. †Pachycetus Van Beneden 1883
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†Pachycetus paulsonii Brandt 1873
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Invalid names: Basilotritus uheni Goldin and Zvonok 2013 [synonym], Pachycetus robustus Van Beneden 1883 [synonym], Platyosphys einori Gritsenko 2001 [synonym], Zeuglodon rossicus Paulson in Brandt 1873 [synonym]
†Pachycetus wardii Uhen 1999
Invalid names: Basilotritus Goldin and Zvonok 2013 [synonym], Platyosphys Kellogg 1936 [synonym]
Diagnosis
Reference | Diagnosis | |
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P. D. Gingerich et al. 2022 | Pachycetinae differ from basilosaurine and dorudontine Basilosauridae in several salient features. Pachycetines have pachyosteosclerotic vertebrae not seen in Basilosaurinae or Dorudon- tinae, and they have pachyosteosclerotic ribs not seen in Dorudontinae. Cartilagenous and ligamentous connective tissue replaces synovial rib articulations. Thoracic vertebrae increase in size from front to back so rapidly that individual centra have a trapezoidal profile. Lumbar vertebrae are elongated like those of Basilosaurinae but differ in having transverse processes nearly as long anteroposteriorly as the centra from which they arise. Most vertebrae have small vascular openings that give surficial bone a distinctively pitted texture. As interpreted here, the innominate of Pachycetus differs from innominates associated with basilosaurines and dorudontines in having a much larger obturator foramen. |
Measurements
No measurements are available
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Source: o = order | |||||
Reference: Uhen 2004 |
Age range: base of the Bartonian to the top of the Priabonian or 41.30000 to 33.90000 Ma
Collections (42 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Eocene | Russian Federation | Archaeoceti indet. (114208) | |
Eocene | Ukraine | Basilosaurus sp. (132383 132385 132389 132391) Zeuglodon sp. (132386) | |
Lutetian - Bartonian | Ukraine | Eocetus sp. (137757) | |
Middle Eocene - Oligocene | Netherlands | Archaeoceti indet. (82994) | |
Bartonian | USA (Virginia) | Eocetus wardii (107512) | |
Bartonian | United Kingdom (England) | Basilosaurus sp. (32915) | |
Bartonian | Ukraine (Luhansk) | Basilotritus uheni, Basilosauridae indet. (132393) | |
Bartonian | Peru (Ica) | Protocetidae indet. (73780) | |
Bartonian | Ukraine (Kirovograd) | Basilosauridae indet. (132381) Basilotritus sp. (141002) | |
Bartonian | Egypt | Antaecetus sp. (227707) Basilotritus sp. (45626) | |
Bartonian | Germany (Lower Saxony) | Pachycetus sp. (211071 211080) | |
Bartonian | Russian Federation | Eocetus sp., Basilosaurus sp. (123876) | |
Bartonian | USA (North Carolina) | Eocetus wardii (7297 7299 75518 99753 132664) | |
Bartonian | Netherlands | Archaeoceti indet. (227706) Pachycetus sp., Pachycetus paulsonii (168386) | |
Bartonian | Germany (Bavaria) | Basilosauridae indet., Eocetus sp. (71821) | |
Bartonian | Western Sahara | Pachycetus sp. (235061 235062) Platyosphys aithai (175734) | |
Bartonian - Priabonian | Ukraine (Kirovograd) | Basilotritus sp. (214010) | |
Bartonian - Priabonian | Germany (Lower Saxony) | Pachycetus sp. (211074 211075) | |
Bartonian - Priabonian | Germany | Pachycetus sp., Dorudontidae indet., Pachycetus robustus (46086) | |
Priabonian | Ukraine (Kiev) | Zeuglodon paulsonii (48026) | |
Priabonian | Germany | Pachycetus sp. (211084) | |
Priabonian | Ukraine (Kyiv) | Platyosphys einori (57767) | |
Priabonian | Ukraine | Platyosphys paulsonii (48027) Zeuglodon paulsonii (48028) | |
Priabonian | Russian Federation | Zeuglodon paulsonii (77227) | |
Priabonian | Germany (Lower Saxony) | Pachycetus sp. (211078) | |
Priabonian | Western Sahara | Platyosphys indet. (206018) |