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Taxonomy
Isocetus was named by Van Beneden (1880) [Sepkoski's age data: T Mi-u].
It was synonymized subjectively with Plesiocetus by True (1912); it was considered a nomen dubium by Steeman (2010).
It was assigned to Balaenidae by Palmer (1904); to Balaenopterinae by Trouessart (1898), Trouessart (1904); to Cetacea by Sepkoski (2002); to Mysticeti by Uhen et al. (2008); to Cetotheriidae by Kellogg (1928), Kellogg (1944), Simpson (1945), Sherman (1952), Whitmore (1984), Carroll (1988), McKenna and Bell (1997), Whitmore and Barnes (2008); and to Thalassotherii by Bisconti et al. (2013), Berta (2017).
It was synonymized subjectively with Plesiocetus by True (1912); it was considered a nomen dubium by Steeman (2010).
It was assigned to Balaenidae by Palmer (1904); to Balaenopterinae by Trouessart (1898), Trouessart (1904); to Cetacea by Sepkoski (2002); to Mysticeti by Uhen et al. (2008); to Cetotheriidae by Kellogg (1928), Kellogg (1944), Simpson (1945), Sherman (1952), Whitmore (1984), Carroll (1988), McKenna and Bell (1997), Whitmore and Barnes (2008); and to Thalassotherii by Bisconti et al. (2013), Berta (2017).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1880 | Isocetus Van Beneden p. 24 figs. not figured |
| 1898 | Isocetus Trouessart p. 1076 |
| 1904 | Isocetus Palmer p. 352 |
| 1904 | Isocetus Trouessart p. 782 |
| 1928 | Isocetus Kellogg p. 35 figs. Table 1 |
| 1944 | Isocetus Kellogg p. 457 |
| 1945 | Isocetus Simpson p. 104 |
| 1952 | Isocetus Sherman p. 99 |
| 1984 | Isocetus Whitmore p. 230 |
| 1988 | Isocetus Carroll |
| 1997 | Isocetus McKenna and Bell p. 376 |
| 2002 | Isocetus Sepkoski |
| 2008 | Isocetus Uhen et al. p. 615 |
| 2008 | Isocetus Whitmore and Barnes p. 173 |
| 2013 | Isocetus Bisconti et al. p. 99 |
| 2017 | Isocetus 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.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||
Age range: base of the Serravallian to the top of the Tortonian or 13.82000 to 7.24600 Ma
Collections (4 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Langhian - Serravallian | Belgium (Nijlen) | I. depauwii (53679) | |
| Langhian - Serravallian | Belgium (Antwerpen) | I. depauwii (51680) | |
| Serravallian | Netherlands | I. sp. (75152) | |
| Tortonian | Denmark (Jutland) | I. depauwii (34521) |