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Rytiodus
Taxonomy
Rytiodus was named by Lartet (1866) [Sepkoski's age data: T Mi-l].
It was corrected as Rhytiodus by Lartet (1866), Trouessart (1898), Trouessart (1904), Abel (1919) and Zittel (1925); it was replaced with Thelriope by Pilleri (1987).
It was assigned to Sirenia by Lartet (1866); to Halitheriidae by Palmer (1904); to Halicoridae by Trouessart (1898) and Trouessart (1904); to Sirenia by Zittel (1925); to Rytiodinae by Simpson (1932); to Halitheriinae by Abel (1919) and Domning (1978); to Rytiodontinae by Kretzoi (1941), Heal (1973), Domning (1989), Toledo and Domning (1991) and Bergqvist et al. (1999); to Sirenia by Sepkoski (2002); to Dugongidae by Carroll (1988) and Domning (2011); and to Dugonginae by Domning (1994), Domning (1996), Domning (1997), Voss (2014), Berta (2017), Domning (2018) and Samonds et al. (2019).
It was corrected as Rhytiodus by Lartet (1866), Trouessart (1898), Trouessart (1904), Abel (1919) and Zittel (1925); it was replaced with Thelriope by Pilleri (1987).
It was assigned to Sirenia by Lartet (1866); to Halitheriidae by Palmer (1904); to Halicoridae by Trouessart (1898) and Trouessart (1904); to Sirenia by Zittel (1925); to Rytiodinae by Simpson (1932); to Halitheriinae by Abel (1919) and Domning (1978); to Rytiodontinae by Kretzoi (1941), Heal (1973), Domning (1989), Toledo and Domning (1991) and Bergqvist et al. (1999); to Sirenia by Sepkoski (2002); to Dugongidae by Carroll (1988) and Domning (2011); and to Dugonginae by Domning (1994), Domning (1996), Domning (1997), Voss (2014), Berta (2017), Domning (2018) and Samonds et al. (2019).
Species lacking formal opinion data
Synonyms
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Synonymy list
Year | Name and author |
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1866 | Rhytiodus Lartet p. 682 |
1866 | Rytiodus Lartet p. 682 figs. Plate XIII Fig. 2-7 |
1898 | Rhytiodus Trouessart p. 1006 |
1904 | Rytiodus Palmer p. 614 |
1904 | Rhytiodus Trouessart p. 750 |
1919 | Rhytiodus Abel p. 834 |
1925 | Rhytiodus Zittel p. 265 |
1932 | Rytiodus Simpson p. 424 |
1941 | Rytiodus Kretzoi p. 155 |
1973 | Rytiodus Heal p. 89 |
1978 | Rytiodus Domning |
1987 | Thelriope Pilleri p. 65 figs. Plate XXXIX |
1988 | Rytiodus Carroll |
1989 | Rytiodus Domning p. 417 |
1991 | Rytiodus Toledo and Domning p. 130 |
1994 | Rytiodus Domning p. 189 |
1996 | Rytiodus Domning p. 391 |
1997 | Rytiodus Domning p. 398 |
1999 | Rytiodus Bergqvist et al. p. 31 |
2002 | Rytiodus Sepkoski |
2011 | Rytiodus Domning p. 1340 |
2014 | Rytiodus Voss p. 91 figs. Figure 3 |
2017 | Rytiodus Berta p. 170 |
2018 | Rytiodus Domning p. 857 figs. Fig. 1 |
2019 | Rytiodus Samonds et al. p. 2 |
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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. †Rytiodus Lartet 1866
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†Rytiodus heali Domning 2011
Invalid names: Thelriope Pilleri 1987 [objective synonym]
Diagnosis
Reference | Diagnosis | |
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D. P. Domning 2011 | Dugongine dugongids characterized by large tusks [c. 140(2)] that are broad and extremely flattened mediolaterally [c. 141(3)], with enamel mainly on medial side [c. 142(1)]; premaxillae with nasal processes that circumscribe an al- most rectangular anterior end of the mesorostral fossa, and are broadened and bulbous at their posterior end, having a more or less vertical joint surface with frontal [c. 6(2)]; thick, strongly downturned supraorbital process of frontal [c. 36(1), 43(1)]; con- cave frontal roof sloping ventrad to anterior margin [c. 42(2)], and temporal crests closely approximated in midline; and retain- ing the following states that are primitive for dugongines: nasals relatively large, not fused with frontals; and posterior process of jugal long [c. 89(0)]. |
Measurements
No measurements are available
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Source: f = family, c = class, subp = subphylum | |||||
References: Hendy et al. 2009, Domning 1978, Carroll 1988, Nowak 1991 |
Age range: base of the Aquitanian to the top of the Tortonian or 23.03000 to 7.24600 Ma
Collections (10 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Aquitanian | France | R. sp. (65085) Thelriope capgrandi (65069) | |
Early/Lower Miocene | Libya | R. sp. (13065) | |
Early/Lower Miocene | Brazil (Para) | R. sp. (65162 65163 112590) | |
Miocene | France | R. capgrandi (65203) | |
Burdigalian - Langhian | Libya | R. healyi (123110) | |
Langhian - Serravallian | Brazil (Para) | R. sp. (58454) | |
Tortonian | Madagascar | R. heali (51586) |