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Rytiodus

Mammalia - Sirenia - Dugongidae

Synonyms
Synonymy list
YearName and author
1866Rhytiodus Lartet p. 682
1866Rytiodus Lartet p. 682 figs. Plate XIII Fig. 2-7
1898Rhytiodus Trouessart p. 1006
1904Rytiodus Palmer p. 614
1904Rhytiodus Trouessart p. 750
1919Rhytiodus Abel p. 834
1925Rhytiodus Zittel p. 265
1932Rytiodus Simpson p. 424
1941Rytiodus Kretzoi p. 155
1973Rytiodus Heal p. 89
1978Rytiodus Domning
1987Thelriope Pilleri p. 65 figs. Plate XXXIX
1988Rytiodus Carroll
1989Rytiodus Domning p. 417
1991Rytiodus Toledo and Domning p. 130
1994Rytiodus Domning p. 189
1996Rytiodus Domning p. 391
1997Rytiodus Domning p. 398
1999Rytiodus Bergqvist et al. p. 31
2002Rytiodus Sepkoski
2011Rytiodus Domning p. 1340
2014Rytiodus Voss p. 91 figs. Figure 3
2017Rytiodus Berta p. 170
2018Rytiodus Domning p. 857 figs. Fig. 1
2019Rytiodus Samonds et al. p. 2

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Life
Deuterostomia
phylumChordataHaeckel 1874
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
subclassSarcopterygii()
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda
Reptiliomorpha
Anthracosauria
subclassAmphibiosauriaKuhn 1967
Cotylosauria()
Amniota
subclassSynapsida
Therapsida()
RankNameAuthor
infraorderCynodontia()
Mammaliamorpha
Mammaliaformes
classMammalia
Theriamorpha(Rowe 1993)
Theriiformes()
Trechnotheria
Cladotheria
Zatheria
subclassTribosphenida()
subclassTheria
Eutheria()
Placentalia
AfrotheriaStanhope et al. 1998
Tethytheria
orderSirenia()
familyDugongidae
subfamilyDugonginae
genusRytiodus

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 capgrandi Lartet 1866
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Invalid names: Thelriope capgrandi Lartet 1866 [synonym]
Rytiodus heali Domning 2011
Invalid names: Thelriope Pilleri 1987 [objective synonym]
Diagnosis
ReferenceDiagnosis
D. P. Domning 2011Dugongine 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
Composition: phosphaticsubp
Environment: marinef
Locomotion: actively mobilec
Life habit: aquaticf
Diet: herbivoref
Reproduction: viviparousf
Created: 2005-06-08 10:11:09
Modified: 2005-06-08 12:11:09
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
Aquitanian23.03 - 20.44France R. sp. (65085) Thelriope capgrandi (65069)
Early/Lower Miocene23.03 - 15.97Libya R. sp. (13065)
Early/Lower Miocene23.03 - 15.97Brazil (Para) R. sp. (65162 65163 112590)
Miocene23.03 - 5.333France R. capgrandi (65203)
Burdigalian - Langhian20.44 - 13.82Libya R. healyi (123110)
Langhian - Serravallian15.97 - 11.62Brazil (Para) R. sp. (58454)
Tortonian11.62 - 7.246Madagascar R. heali (51586)