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Kaupitherium

Mammalia - Dugongidae

Synonymy list
YearName and author
2017Kaupitherium Voss and Hampe p. 341 figs. Figures 2–9

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

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
M. Voss and O. Hampe 2017Dugongid genus on the basis of the following com- bination of synapomorphies: absence of alisphenoid canal, open foramen ovale, loss of permanent fifth premolar, and squamosal reaching temporal crest. Differs from the Dugonginae, the Hydrodamalinae, and other dugongid genera (Eotheroides, Prototherium, Eosiren, Caribosiren, Priscosiren, Metaxytherium, and other species formerly lumped under “Halitherium” [Table 1] by displaying the following unique combination of plesiomorphies: frontal roof flat; supraorbital process of the frontal dorsoventrally flattened with well-developed, prominent posterolateral corner; supraoccipital wider dorsally than ventrally; exoccipitals meet in a suture dorsal to the foramen magnum; posttympanic process with a prominent anteroventral process for attachment of m. sternomas- toideus; paroccipital process of exoccipital long, reaching as far ventrally as occipital condyles; accessory mental foramina present; horizontal ramus of mandible slender dorsoventrally; permanent premolars present. Synapomorphies: nasals reduced, but still meet in midline (shared with some Eosiren ssp. and Prototherium intermedium), nasal incisure at posterior end of the mesorostral fossa small, not extending posterior to the supraorbital processes (shared with some Metaxytherium spp., Caribosiren, Dusisiren, and Eosiren imenti); ventral border of the horizontal mandibular ramus moderately concave and sharply downturned anteriorly (shared with some Eotheroides spp., some Prototherium spp., Eosiren libyca, and “Halitherium” taulannense), masticating surface of mandible narrow, scarcely wider than the two rows of alveoli it bears (shared with some Prototherium spp., some Eotheroides spp., Eosiren libyca, and “H.” taulannense). In contrast to the contemporary Old World species E. imenti, the I1 alveolus depth is about half the length of the premaxillary symphysis, and the canines and P1/p1 are absent.