About: Janjucetus   Sponge Permalink

An Entity of Type : owl:Thing, within Data Space : 134.155.108.49:8890 associated with source dataset(s)

Janjucetus is estimated to have been about 3.5 m (11 ft) in length, about the size of the modern bottlenose dolphin and much smaller than any living baleen whale. It is considered to be a mysticete due to key synapomorphies of the skull anatomy, for example in the way rostral bones meet the bones of the braincase. The relatively short snout tapers anteriorly from a broad base and is triangular in dorsal view. The incisors and canines form a terminal rosette of conical stabbing teeth, while the premolars and molars are shaped like serrated blades. The orbits are exceptionally large. No evidence shows Janjucetus possessed the ability to echolocate and probably relied on good eyesight to locate its prey.

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rdfs:label
  • Janjucetus
  • Janjucetus
rdfs:comment
  • Janjucetus is estimated to have been about 3.5 m (11 ft) in length, about the size of the modern bottlenose dolphin and much smaller than any living baleen whale. It is considered to be a mysticete due to key synapomorphies of the skull anatomy, for example in the way rostral bones meet the bones of the braincase. The relatively short snout tapers anteriorly from a broad base and is triangular in dorsal view. The incisors and canines form a terminal rosette of conical stabbing teeth, while the premolars and molars are shaped like serrated blades. The orbits are exceptionally large. No evidence shows Janjucetus possessed the ability to echolocate and probably relied on good eyesight to locate its prey.
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dcterms:subject
abstract
  • Janjucetus is estimated to have been about 3.5 m (11 ft) in length, about the size of the modern bottlenose dolphin and much smaller than any living baleen whale. It is considered to be a mysticete due to key synapomorphies of the skull anatomy, for example in the way rostral bones meet the bones of the braincase. The relatively short snout tapers anteriorly from a broad base and is triangular in dorsal view. The incisors and canines form a terminal rosette of conical stabbing teeth, while the premolars and molars are shaped like serrated blades. The orbits are exceptionally large. No evidence shows Janjucetus possessed the ability to echolocate and probably relied on good eyesight to locate its prey. Janjucetus is considered to be closely related to Mammalodon, another genus of toothed mysticetes from southeastern Australia. Janjucetus was initially assigned to its own monotypic family, Janjucetidae, but a subsequent cladistic analysis by Fitzgerald (2010) transferred it to the Mammalodontidae, making Janjucetidae a junior synonym.
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