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Thalassocetus antwerpiensis
Taxonomy
Thalassocetus antwerpiensis was named by Abel (1905) [lectotype IRNSB M.525]. Its type specimen is MRHNB 3428 and is a 3D body fossil.
It was considered a nomen dubium by Fordyce and de Muizon (2001).
It was considered a nomen dubium by Fordyce and de Muizon (2001).
Synonymy list
| Year | Name and author |
|---|---|
| 1905 | Thalassocetus antwerpiensis Abel p. 70 |
| 2002 | Thalassocetus antwerpiensis Kazár p. 154 |
| 2008 | Thalassocetus antwerpiensis Lambert p. 303 |
| 2015 | Thalassocetus antwerpiensis Velez-Juarbe et al. p. 15 figs. Fig. 10 |
| 2021 | Thalassocetus antwerpiensis Alfsen et al. p. 809 |
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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.
†Thalassocetus antwerpiensis Abel 1905
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| O. Lambert 2008 | Thalassocetus an twerp iens is is a small physeteroid species with a skull size close to Kogia breviceps. It differs from all the other kogiids in the nodular postglenoid process of the squamosal, and the thin supraorbital area of the skull, from Kogia and Scaphokogia in the U-shaped short antorbital notch, from Aprixokogia, Kogia, and Praekogia in the right antorbital notch being distinctly outside the supracranial basin and in larger dorsal infraorbital foramina, from Aprixokogia and Praekogia in the temporal fossa being anteroposteriorly compressed, and from Kogia and Praekogia in the absence of a wide notch in the squamosal for the enlarged posterior process of the tympanic bulla. | |
| A. Alfsen et al. 2021 | This small size physeterid (postorbital width lower than 300 mm in the juvenile to subadult lectotype, within the range of adults of Kogia spp.) can be distinguished from all other physeteroids (stem physeteroids, physeterids, and kogiids) by the following unique combination of cranial morphological features: antorbital notch being located outside the proportionally narrow supracranial basin (differing from most kogiids); at least one right dorsal infraorbital foramen being located inside the supracranial basin; retention of the left nasal along the left posterolateral wall of the supracranial basin (differing from kogiids for which the postnarial region is known); left nasal being posteriorly pointed, with the apex nearly reaching the nuchal crest and being close to the sagittal plane of the cranium (differing, among others, from Orycterocetus crocodili- nus Cope, 1868); absence of a sagittal facial crest in the supracranial basin (differing from most kogiids); abrupt dorsal elevation of the posterior part of the maxilla towards the nuchal crest; short, trian- gular zygomatic process of the squamosal (ratio between distance from anterior tip of zygomatic process to exoccipital and postorbital width lower than 0.25); nodular, somewhat anteroposteriorly thick- ened postglenoid process of the squamosal; anteroposteriorly short posttympanic process of the squamosal, lacking a broad notch for the posterior process of the tympanic (differing from most kogiids); and anterodorsal portion of the surface of the occipital shield being dorsoventrally concave and transversely convex. |
Measurements
No measurements are available
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| Source: f = family, subo = suborder, o = order | |||||
| References: Nowak 1991, Uhen 2004 | |||||
Age range: base of the Late/Upper Miocene to the top of the Late/Upper Pliocene or 11.63000 to 2.58000 Ma
Collections: one only
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Late/Upper Miocene - Late/Upper Pliocene | Belgium (Antwerpen) | Thalassocetus antwerpiensis (47465) |