| Basic info | Taxonomic history | Classification | Included Taxa |
| Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Taxonomy
Borealodon osedax was named by Shipps et al. (2019). Its type specimen is USNM 539939, a partial skull, and it is a 3D body fossil. Its type locality is Murdock Creek, which is in a Rupelian deep-water siltstone in the Pysht Formation of Washington.
Synonymy list
| Year | Name and author |
|---|---|
| 2019 | Borealodon osedax Shipps et al. p. 3 |
| 2024 | Borealodon osedax Hernández Cisneros and Velez-Juarbe p. 2 |
Is something missing? Join the Paleobiology Database and enter the data
|
|
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.
†Borealodon osedax Shipps et al. 2019
show all | hide all
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| B. K. Shipps et al. 2019 | Borealodon is identified as a Neoceti based on the following derived characters, absent in stem cetaceans: loss of sagittal crest; supraoccipital shield anterodorsally inclined. Borealodon can be identified as belonging to the lineage of Mysticeti based on the following derived characters: presence of a maxillary infraorbital plate; and a triangular supraoccipital shield. Borealodon is differentiated from Mammalodontidae by having a posterior portion of the maxilla situated lateral to the nasals and the premaxilla (character 20, state 2); a deep suprameatal fossa of the periotic (character 218, state 0); and a medial lobe of the tympanic bulla that is transversely wider than the lateral lobe (character 244, state 0). Borealodon is also differentiated from Aetiocetidae in having an anterior process of the periotic that is dorsoventrally deepest within the anterior 50% of the anterior process (character 180, state 1); a periotic with a proximal opening of the facial canal that is larger than the aperture for the vestibular aqueduct (character 190, state 0); and a medial lobe of the tympanic bulla that is transversely wider than the lateral lobe in ventral view (character 244, state 0). Borealodon preserves the following combination of character states: a frontal that lies at the same dorsoventral height as the nasals (character 86, state 1); and a periotic with a crista transversa that is deeply recessed within the internal acoustic meatus (character 219, state 1). |
Measurements
No measurements are available
|
|
||||
|
|
||||
|
|
||||
|
|||||
|
|
||||
|
|||||
|
|
||||
| Source: subo = suborder, o = order | |||||
| Reference: Uhen 2004 | |||||