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'''''Neophocaena''''' is a genus of [[porpoise]] native to the [[Indian Ocean|Indian]] and [[Pacific Ocean|Pacific]] oceans, as well as the [[Fresh water|freshwater]] habitats of the [[Yangtze|Yangtze River basin]] in [[China]]. They are commonly known as '''finless porpoises'''. Genetic studies indicate that ''Neophocaena'' is the most [[Basal (phylogenetics)|basal]] living member of the porpoise family.<ref name="Rosel1995">{{cite journal|author=Rosel, P. E.|display-authors=etal|year=1995|title=Phylogenetic relationships among the true porpoises (Cetacea: Phocoenidae)|journal=Molecular Phylogenetics and Evolution|volume=4|issue=4|pages=463–474|doi=10.1006/mpev.1995.1043|pmid=8747302}}</ref>
'''''Neophocaena''''' is a genus of [[porpoise]] native to the [[Indian Ocean|Indian]] and [[Pacific Ocean|Pacific]] oceans, as well as the [[Fresh water|freshwater]] habitats of the [[Yangtze|Yangtze River basin]] in [[China]]. They are commonly known as '''finless porpoises'''. Genetic studies indicate that ''Neophocaena'' is the most [[Basal (phylogenetics)|basal]] living member of the porpoise family.<ref name="Rosel1995">{{cite journal|author=Rosel, P. E.|display-authors=etal|year=1995|title=Phylogenetic relationships among the true porpoises (Cetacea: Phocoenidae)|journal=Molecular Phylogeneticsution|volume=4|issue=4|pages=463–474|doi=10.1006/mpev.1995.1043|pmid=8747302}}</ref>


There are three species in this genus:<ref>{{Citation|last=Mammal Diversity Database|title=Mammal Diversity Database|date=2021-08-10|url=https://zenodo.org/record/5175993|publisher=Zenodo|access-date=2021-08-28}}</ref><ref>{{Cite journal|date=2018-01-01|title=Finless Porpoises: Neophocaena phocaenoides, N. asiaeorientalis|url=https://www.sciencedirect.com/science/article/pii/B9780128043271001291|journal=Encyclopedia of Marine Mammals|language=en|pages=372–375|doi=10.1016/B978-0-12-804327-1.00129-1}}</ref>
There are three species in this genus:<ref>{{Citation|last=Mammal Diversity Database|title=Mammal Diversity Database|date=2021-08-10|url=https://zenodo.org/record/5175993|publisher=Zenodo|access-date=2021-08-28}}</ref><ref>{{Cite journal|date=2018-01-01|title=Finless Porpoises: Neophocaena phocaenoides, N. asiaeorientalis|url=https://www.sciencedirect.com/science/article/pii/B9780128043271001291|journal=Encyclopedia of Marine Mammals|language=en|pages=372–375|doi=10.1016/B978-0-12-804327-1.00129-1}}</ref>
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|[[File:Yangtze finless porpoise, 12 February 2008a.jpg|frameless|120x120px]]
|[[File:Yangtze finless porpoise, 12 February 2008a.jpg|frameless|120x120px]]
|''Neophocaena asiaeorientalis''
|''phocaena asiaeorientalis''
|[[Yangtze finless porpoise]]
|[[Yangtze finless porpoise]]
|Yangtze River basin in China
|Yangtze River basin in China
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|[[East Asian finless porpoise]]
|[[East Asian finless porpoise]]
|Taiwan Strait north to the Yellow Sea, east to the east coast of Japan
|Taiwan Strait north to the Yellow Sea, east to the east coast of Japan
|}
|


== Description ==
== Description ==
The finless porpoises are the only porpoises to lack a true [[dorsal fin]]. Instead there is a low ridge covered in thick skin bearing several lines of tiny tubercles. In addition, the forehead is unusually steep compared with those of other porpoises. With fifteen to twenty-one teeth in each jaw, they also have, on average, fewer teeth than other porpoises, although there is some overlap, and this is a not a reliable means of distinguishing them.<ref name="Jefferson2004">{{cite journal|author1=Jefferson, T. A.|author2=Hung, S. K.|year=2004|title=''Neophocaena phocaenoides''|journal=Mammalian Species|volume=746|pages=1–12|doi=10.1644/746|doi-access=free|s2cid=198125391|df=dmy-all}}</ref>
The finless porpoisere the only porpoises to lack a true [[dorsal fin]]. Instead there is a low ridge covered in thick skin bearing several lines of tiny tubercles. In addition, the forehead is unusually steep compared with those of other porpoises. With fifteen to twenty-one teeth in each jaw, they also have, on average, fewer teeth than other porpoises, although there is some overlap, and this is a not a reliable means of distinguishing them.<ref name="Jefferson2004">{{cite journal|author1=Jefferson, T. A.|author2=Hung, S. K.|year=2004|title=''Neophocaena phocaenoides''|journal=Mammalian Species|volume=746|pages=1–12|doi=10.1644/746|doi-access=free|s2cid=198125391|df=dmy-all}}</ref>


== References ==
== References ==
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[[Category:Porpoises]]
[[Category:Porpoises]]
[[Category:Taxa named by Theodore Sherman Palmer]]
[[Category:Taxa ed by Theodore Sherman Palmer]]
[[Category:Cetacean genera]]
[[Category:Cetacean genera]]

Revision as of 22:48, 7 April 2022

Finless porpoise
Neophocaena sunameri at Miyajima Public Aquarium
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Infraorder: Cetacea
Family: Phocoenidae
Genus: Neophocaena
Palmer, 1899
Type species
Neophocaena phocaenoides
Species

Neophocaena asiaeorientalis
Neophocaena phocaenoides
Neophocaena sunameri

For all three finless porpoise species

Neophocaena is a genus of porpoise native to the Indian and Pacific oceans, as well as the freshwater habitats of the Yangtze River basin in China. They are commonly known as finless porpoises. Genetic studies indicate that Neophocaena is the most basal living member of the porpoise family.[1]

There are three species in this genus:[2][3]

Image Scientific name Common name Distribution
phocaena asiaeorientalis Yangtze finless porpoise Yangtze River basin in China
Neophocaena phocaenoides Indo-Pacific finless porpoise Persian Gulf east to the Taiwan Strait, south to Indonesia
Neophocaena sunameri East Asian finless porpoise Taiwan Strait north to the Yellow Sea, east to the east coast of Japan

Description

The finless porpoisere the only porpoises to lack a true dorsal fin. Instead there is a low ridge covered in thick skin bearing several lines of tiny tubercles. In addition, the forehead is unusually steep compared with those of other porpoises. With fifteen to twenty-one teeth in each jaw, they also have, on average, fewer teeth than other porpoises, although there is some overlap, and this is a not a reliable means of distinguishing them.[4]

References

  1. ^ Rosel, P. E.; et al. (1995). "Phylogenetic relationships among the true porpoises (Cetacea: Phocoenidae)". Molecular Phylogeneticsution. 4 (4): 463–474. doi:10.1006/mpev.1995.1043. PMID 8747302.
  2. ^ Mammal Diversity Database (2021-08-10), Mammal Diversity Database, Zenodo, retrieved 2021-08-28
  3. ^ "Finless Porpoises: Neophocaena phocaenoides, N. asiaeorientalis". Encyclopedia of Marine Mammals: 372–375. 2018-01-01. doi:10.1016/B978-0-12-804327-1.00129-1.
  4. ^ Jefferson, T. A.; Hung, S. K. (2004). "Neophocaena phocaenoides". Mammalian Species. 746: 1–12. doi:10.1644/746. S2CID 198125391.
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