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Tranatocetidae
Taxonomy
Tranatocetidae was named by Gol'din and Steeman (2015).
It was assigned to Plicogulae by Gol'din and Steeman (2015); and to Thalassotherii by Berta (2017).
It was assigned to Plicogulae by Gol'din and Steeman (2015); and to Thalassotherii by Berta (2017).
Subtaxa
Synonymy list
| Year | Name and author |
|---|---|
| 2015 | Tranatocetidae Gol'din and Steeman p. 3 |
| 2017 | Tranatocetidae Berta p. 168 |
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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.
Fm. †Tranatocetidae Gol'din and Steeman 2015
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G. †Mesocetus Van Beneden 1880
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†Mesocetus agrami Van Beneden 1884
†Mesocetus aquitanicus Flot 1896
†Mesocetus hungaricus Kadic 1904
†Mesocetus longirostris Van Beneden 1880
†Mesocetus siphunculus Cope 1895
Invalid names: Mesocetus pinguis Van Beneden 1880 [nomen dubium]
G. †Plesiocetopsis Brandt 1873
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†Plesiocetopsis hupschii Van Beneden 1859
†Plesiocetopsis occidentalis Kellogg 1925
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| P. Gol'din and M. E. Steeman 2015 | Plicogulae sharing the following combination of specific features: (1) rostral bones override or divide frontals and contact parietals; (2) nasals (sometimes with premaxillae) divide maxillae on the vertex; (3) dorsoventrally bent occipital shield, with more horizontal anterior portion and more vertical posterior portion; (4) tympanic bulla with short, narrow anterior portion with rounded or squared anterior end and wider and higher posterior portion that is particularly swollen in the posteroventral area; a moderately deep lateral furrow and a shallow groove posterior to the sigmoid process; well-developed conical process.
Differing from Cetotheriidae and related taxa in: having a deep anteriorly, anteroventrally or anterolaterally (rather than anteromedially) oriented glenoid fossa; the posterior process of the tympanoperiotic slightly (rather than broadly) exposed on the posterolateral wall of the skull; short angular process of the mandible and the broad and low condyle oriented in the same plane as the ramus. Differing from Pinocetus, Cephalotropis and Neobalaenidae in the shape of tympanic bulla: the inflated posterolateral (rather than anterolateral) end and a shal- lower lateral furrow. Differing from Titanocetus, Balaenopteridae and Eschrichtiidae in: the absence of the anterior wing of the parietal bone (present in Mixocetus); the triangular occipital shield with the sharp anterior end (rounded in Mixocetus); the long coronoid process and dor- sally open sub-condylar furrow of the mandible. Differing further from Balaenopteridae and Eschrichtiidae in the thin and long zygomatic process of squamosal; the paroccipital process protruding far posterior to the postglenoid process; the anterior margin of the supraoccipital posterior to the centre of the temporal fossa; the distally broadening posterior process of the tympanoperiotic exposed on the posterolateral wall of the skull. Sharing with Cetotheriidae, Balaenopteridae and Eschrichtiidae the X-shaped skull vertex formed by approximating or contacting occipital shield and maxillary elements (combined telescoping of skull); squamosal cleft (except in some cetotheriids); well-developed anterior process of the periotic that is at least as long as its lateral flange (or lateral tuberosity). |
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||
Age range: base of the Burdigalian to the top of the Piacenzian or 20.45000 to 2.58000 Ma
Collections (37 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Early/Lower Miocene | Chile | Plesiocetopsis sp. (46980) | |
| Neogene | France | Mesocetus aquitanicus (85462) | |
| Neogene | United Kingdom (England) | Plesiocetus hupschii (96466) | |
| Neogene | Chile | Plesiocetopsis sp. (100126) | |
| Burdigalian | France | Mesocetus aquitanicus (57732) | |
| Burdigalian | USA (Virginia) | Mesocetus siphunculus (85360) | |
| Langhian | USA (Virginia) | Mesocetus siphunculus (79793) | |
| Langhian | USA (Maryland) | Mesocetus siphunculus (45509 70834 71795) | |
| Langhian - Serravallian | Belgium | Plesiocetus hupschii (59123) | |
| Middle Miocene | Netherlands | Mesocetus longirostris (192727) | |
| Badenian | Austria | Mesocetus hungaricus (56462) | |
| Serravallian | USA (Virginia) | Mesocetus pusillus (71817) Mesocetus siphunculus (126605 187324) Mesocetus sp. (55690) | |
| Serravallian | Netherlands | Mesocetus sp., Mesocetus longirostris, Plesiocetus longirostris, Plesiocetus hupschi (75152) | |
| Serravallian | USA (Maryland) | Mesocetus siphunculus (70835) | |
| Serravallian | Russian Federation (Dagestan) | Plesiocetopsis sp. (49685) | |
| MN 6 - MN 7 + 8 | Slovakia | Mesocetus hungaricus (69712) Mesocetus sp. (69714) | |
| Pannonian | Hungary | Mesocetus hungaricus (237418) | |
| Tortonian | Croatia | Mesocetus agrami (84949) | |
| Tortonian | Austria | Mesocetus sp. (85508) | |
| Tortonian | Belgium (Antwerpen) | Plesiocetus hupschi (66960) Plesiocetus hupschii (204940) | |
| Tortonian | Bosnia and Herzegovina | Mesocetus agrami (54124 54125 54126 54127) | |
| Tortonian | USA (California) | Mixocetus elysius (13098) Mixocetus sp. (13300 225311) | |
| Tortonian - Messinian | Belgium (Antwerpen) | Mesocetus longifrons, Mesocetus longirostris, Mesocetus pinguis (67022) | |
| Messinian - Early/Lower Pleistocene | Netherlands | Mesocetus longirostris (189573) | |
| Piacenzian | Italy | Mesocetus sp. (47428) |