Xenorophidae

Xenorophidae Temporal range: 30–23.03 Ma PreꞒ Ꞓ O S D C P T J K Pg N Oligocene[1]
Cotylocara
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Artiodactyla
Infraorder:	Cetacea
Parvorder:	Odontoceti
Family:	†Xenorophidae Uhen, 2008
Genera
Albertocetus Archaeodelphis Cotylocara Echovenator Inermorostrum Mirocetus Xenorophus

Xenorophidae is an extinct family of odontocetes, currently known from the Oligocene of the Southeastern United States. Known genera of xenorophids include Albertocetus, Archaeodelphis, Xenorophus,^[2] Cotylocara,^[3] Echovenator,^[4] and Inermorostrum.^{[5][excessive citations]}

Albertocetus reconstruction outline, showing known bones in red. From Boessenecker et al. 2017

References

1. "Xenorophidae". paleobiodb.org.
2. Uhen, M.D. (2008). "A new Xenorophus-like odontocete cetacean from the Oligocene of North Carolina and a discussion of the basal odontocete radiation". Journal of Systematic Palaeontology. 6 (4): 433–452. Bibcode:2008JSPal...6..433U. doi:10.1017/S1477201908002472. S2CID 86668273.
3. Geisler, J.H.; Colbert, M.W.; Carew, J.L. (2014). "A new fossil species supports an early origin for toothed whale echolocation". Nature. 508 (7496): 383–386. Bibcode:2014Natur.508..383G. doi:10.1038/nature13086. PMID 24670659. S2CID 4457391.
4. Churchill, M.; Martinez-Caceres, M.; et al. (2016). "The origin of high-frequency hearing in whales". Current Biology. 26 (16): 2144–2149. Bibcode:2016CBio...26.2144C. doi:10.1016/j.cub.2016.06.004. PMID 27498568..
5. Geisler, J.H.; Boessenecker, R.W.; et al. (2017). "The origin of filter feeding in whales". Current Biology. 27 (13): 2036–2042.e2. Bibcode:2017CBio...27E2036G. doi:10.1016/j.cub.2017.06.003. PMID 28669761..