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Zarhachis
Taxonomy
Zarhachis was named by Cope (1868). It was considered monophyletic by Muizon (1987) and Uhen et al. (2008) and Geisler et al. (2011).
It was assigned to Iniidae by Gill (1872); to Eurhinodelphinae by Trouessart (1904); to Acrodelphinae by Zittel (1925); to Platanistinae by Trouessart (1898), Hay (1902), Hay (1930) and Simpson (1945); to Platanistidae by Gill (1871), Cope (1890), Rhoads (1903), Case (1904), Kellogg (1928), Whitmore (1984), Muizon (1987), Carroll (1988), Muizon (1994), Gottfried et al. (1994), McKenna and Bell (1997), Hamilton et al. (2001), Fordyce and de Muizon (2001), Bianucci and Landini (2002), Geisler and Sanders (2003), Uhen et al. (2008), Geisler et al. (2011), Boersma and Pyenson (2016), Berta (2017), Aguirre-Fernández et al. (2017) and Kimura (2018); and to Pomatodelphininae by Barnes (2006), Bianucci et al. (2013), Marx et al. (2016), Godfrey et al. (2017) and Godfrey and Lambert (2023).
It was assigned to Iniidae by Gill (1872); to Eurhinodelphinae by Trouessart (1904); to Acrodelphinae by Zittel (1925); to Platanistinae by Trouessart (1898), Hay (1902), Hay (1930) and Simpson (1945); to Platanistidae by Gill (1871), Cope (1890), Rhoads (1903), Case (1904), Kellogg (1928), Whitmore (1984), Muizon (1987), Carroll (1988), Muizon (1994), Gottfried et al. (1994), McKenna and Bell (1997), Hamilton et al. (2001), Fordyce and de Muizon (2001), Bianucci and Landini (2002), Geisler and Sanders (2003), Uhen et al. (2008), Geisler et al. (2011), Boersma and Pyenson (2016), Berta (2017), Aguirre-Fernández et al. (2017) and Kimura (2018); and to Pomatodelphininae by Barnes (2006), Bianucci et al. (2013), Marx et al. (2016), Godfrey et al. (2017) and Godfrey and Lambert (2023).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1868 | Zarhachis Cope p. 189 |
| 1871 | Zarhachis Gill p. 125 |
| 1872 | Zarhachis Gill p. 94 |
| 1890 | Zarhachis Cope p. 604 |
| 1898 | Zarhachis Trouessart p. 1024 |
| 1902 | Zarhachis Hay p. 592 |
| 1903 | Zarhachis Rhoads p. 248 |
| 1904 | Zarhachis Case p. 20 |
| 1904 | Zarhachis Trouessart p. 762 |
| 1925 | Zarhachis Zittel p. 87 |
| 1928 | Zarhachis Kellogg p. 34 figs. Table 1 |
| 1930 | Zarhachis Hay p. 596 |
| 1945 | Zarhachis Simpson p. 101 |
| 1984 | Zarhachis Whitmore p. 230 |
| 1987 | Zarachis Muizon p. 13 |
| 1988 | Zarhachis Carroll |
| 1994 | Zarhachis Gottfried et al. p. 233 |
| 1994 | Zarhachis Muizon p. 136 |
| 1997 | Zarhachis McKenna and Bell p. 383 |
| 2001 | Zarhachis Fordyce and de Muizon p. 178 |
| 2001 | Zarhachis Hamilton et al. p. 554 figs. Table 1 |
| 2002 | Zarhachis Bianucci and Landini p. 21 |
| 2003 | Zarhachis Geisler and Sanders p. 28 |
| 2006 | Zarhachis Barnes p. 32 |
| 2008 | Zarhachis Uhen et al. p. 582 |
| 2011 | Zarhachis Geisler et al. p. 6 figs. Table 1 |
| 2013 | Zarachis Bianucci et al. p. 744 figs. Figure 3 |
| 2016 | Zarhachis Boersma and Pyenson p. 12 figs. Figure 10 |
| 2016 | Zarhachis Marx et al. p. 125 |
| 2017 | Zarhachis Aguirre-Fernández et al. |
| 2017 | Zarhachis Berta p. 163 |
| 2017 | Zarhachis Godfrey et al. |
| 2018 | Zarhachis Kimura p. 4 figs. Fig. 4 |
| 2023 | Zarhachis Godfrey and Lambert p. 87 |
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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.
G. †Zarhachis Cope 1868
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†Zarhachis crassangulum Case 1904
†Zarhachis flagellator Cope 1868
†Zarhachis tysonii Cope 1869
†Zarhachis velox Cope 1869
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| M. D. Uhen et al. 2008 | Lumbar vertebrae have broadly a broadly obtuse medial line, which offers distinct traces of the two keels. Members of the genus Zarhachis have dorsoventrally compressed rostra and symphyseal regions of the mandibles (Cope, 1868b). |
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 Burdigalian to the top of the Tortonian or 20.44000 to 7.24600 Ma
Collections (17 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Burdigalian | USA (Maryland) | Z. flagellator (45493) | |
| Burdigalian | USA (New Jersey) | Z. velox (18587) | |
| Burdigalian | USA (Delaware) | Z. flagellator (18579) | |
| Burdigalian | Germany | Z. sp. (47425) | |
| Burdigalian | Venezuela | Z. flagellator (181413) | |
| Langhian | USA (Maryland) | Priscodelphinus crassangulum, Mesoplodon sp. (45502) Schizodelphis crassangulum (70823) Z. sp. (48884) | |
| Langhian | USA (Virginia) | Schizodelphis crassangulum (79793) Z. sp. (66065) | |
| Langhian - Serravallian | USA (Maryland) | Z. sp. (231780) | |
| Serravallian | USA (Maryland) | Z. flagellator (55396 57782) Z. sp. (70843) | |
| Serravallian | USA (Virginia) | Schizodelphis crassangulum (126605) Z. sp., Schizodelphis crassangulum (187324) | |
| Tortonian | USA (Maryland) | Z. tysonii (55395) |