Basic info Taxonomic history Classification Relationships
Morphology Ecology and taphonomy External Literature Search Age range and collections

Callistosiren

Mammalia - Dugongidae

Synonymy list
YearName and author
2015Callistosiren Velez-Juarbe and Domning p. 2 figs. Figs. 1-10
2017Callistosiren Berta p. 170

Is something missing? Join the Paleobiology Database and enter the data

RankNameAuthor
kingdomAnimalia()
Triploblastica
Nephrozoa
Deuterostomia
phylumChordataHaeckel 1847
subphylumVertebrata
superclassGnathostomata
Osteichthyes()
Sarcopterygii
subclassDipnotetrapodomorpha(Nelson 2006)
subclassTetrapodomorpha()
Tetrapoda()
Reptiliomorpha
Anthracosauria
Batrachosauria()
Cotylosauria()
RankNameAuthor
Amniota
Synapsida()
Therapsida()
infraorderCynodontia()
Epicynodontia
infraorderEucynodontia
Probainognathia
Mammaliamorpha
Mammaliaformes
classMammalia
Pansirenia
Sirenia()
familyDugongidae
subfamilyDugonginae
genusCallistosiren

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
ReferenceDiagnosis
J. Velez-Juarbe and D. P. Domning 2015Dugongine of medium body size (2–3 m; Sarko et al., 2010); differs from other dugongines by displaying the fol- lowing unique combination of plesiomorphic and derived charac- ters: nasal process of premaxilla tapering but thickened (c. 6[1]), shared with Kutchisiren cylindrica, Rytiodus capgrandi, and Bharatisiren kachchhensis; supraorbital process of frontal dorso- ventrally thin (<2 cm) and well developed, with recurved, bluntly pointed posterolateral corner (c. 36[0]), shared with Bharatisiren kachchhensis and Dioplotherium sp. (ECOCHM 2491); ventral rim of orbit not overhanging the lateral surface of the jugal (c. 90[0]), shared with Corystosiren varguezi; pterygoid fossa tall [c. 102(1)], shared with Crenatosiren olseni, Rytiodus heali, and Bharatisiren spp.; and tusks large (longer than half the length of the premaxillary symphysis) (c. 140[2]), lozenge- or kite-shaped in cross-section (c. 141[2]), and with enamel confined to the medial side (c. 142[1]). Displays the following apomor- phies: lacrimals with thin (<5 mm), elongated (»20 mm) dorsal process that is wedged between the premaxilla and frontal, and osteosclerotic but minimally pachyostotic ribs and vertebrae.