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Taxonomy
Mesocetus argillarius was named by Roth (1978). Its type specimen is MGUHVP 2319, a partial skull, and it is a 3D body fossil. Its type locality is Gram Brick Works, which is in a Tortonian marine claystone in the Gram Formation of Denmark. It is the type species of Tranatocetus.
It was considered an invalid subgroup of Cetotherioidea by Steeman (2007), Steeman (2010); it was considered an invalid subgroup of Chaeomysticeti by Bisconti et al. (2013); it was recombined as Tranatocetus argillarius by Gol'din and Steeman (2015).
It was considered an invalid subgroup of Cetotherioidea by Steeman (2007), Steeman (2010); it was considered an invalid subgroup of Chaeomysticeti by Bisconti et al. (2013); it was recombined as Tranatocetus argillarius by Gol'din and Steeman (2015).
Synonymy list
| Year | Name and author |
|---|---|
| 1978 | Mesocetus argillarius Roth p. 64 figs. Fig. 2-7 |
| 2015 | Tranatocetus argillarius Gol'din and Steeman 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.
†Tranatocetus argillarius Roth 1978
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Gol'din and M. E. Steeman 2015 | Modified from [12]. The scapula is anteroposteriorly elongated; the glenoid cavity displaced toward the anterior end. The deltopectoral crest of the humerus is long. Differ- ing from all Plicogulae, except Mesocetus longirostris, Pelocetus calvertensis and Parietobalaena campiniana, in: retaining plesiomorphic features of the lower jaw: the dorsal border in front of the mandibular condyle gradually ascending towards the coronoid process, wide mandibular foramen and wide mandibular canal. Differing from Mesocetus longirostris, “Aulocetus” latus, “Cetotherium” megalophysum and “Cetotherium” vandelli in: the wide skull with laterally expanded squamosals; straight ascending processes of maxillae which extend parallel to each other (rather than tapering and converging posteriorly); small lateral projection of the poste- rior meatal crest on the posterolateral side of the postglenoid process and paroccipital processes extending far posterior to the occipital condyles. Sharing only with Mesocetus longirostris: pos- terior ends of premaxillae fused with the maxillae and divided on the vertex by long, narrow and high (vertical plate-like) nasals; cervical vertebrae with wide transverse foramina, almost as wide as the centra (see also [12]).
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Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||