Ajay Kumar at 21:33, 30 August 2023

2023-08-30T21:33:25Z

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{{Short description|Genus of porpoises}}
{{Automatic taxobox
| image = Neophocaena phocaenoides -Miyajima Aquarium -Japan-8a.jpg
| image_caption = ''[[Neophocaena sunameri]]'' at [[Miyajima Public Aquarium]]
| taxon = Neophocaena
| authority = [[Theodore Sherman Palmer|Palmer]], 1899
| type_species = ''[[Neophocaena phocaenoides|Delphinus phocaenoides]]'' <ref>{{MSW3|id=14300109}}</ref>
| type_species_authority = Cuvier, 1829
| subdivision_ranks = Species
| subdivision = ''[[Neophocaena asiaeorientalis]]''<br />''[[Neophocaena phocaenoides]]''<br />''[[Neophocaena sunameri]]''
| range_map = 江豚的分布.svg
| range_map_caption = For all three finless porpoise species
}}
'''''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>

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|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>

{| class="wikitable"
!Image
!Scientific name
!Common name
!Distribution
|-
|[[File:Yangtze finless porpoise, 12 February 2008a.jpg|frameless|120x120px]]
|''Neophocaena asiaeorientalis''
|[[Yangtze finless porpoise]]
|Yangtze River basin in China
|-
|[[File:Stamps of Indonesia, 040-05.jpg|frameless|120x120px]]
|''Neophocaena phocaenoides''
|[[Indo-Pacific finless porpoise]]
|Persian Gulf east to the Taiwan Strait, south to Indonesia
|-
|[[File:Neophocaena phocaenoides DSC 03.jpg|frameless|120x120px]]
|''Neophocaena sunameri''
|[[East Asian finless porpoise]]
|Taiwan Strait north to the Yellow Sea, east to the east coast of Japan
|}

== 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>

== References ==
{{reflist}}

{{Cetacea|O.}}
{{Odontoceti|D.}}
{{Taxonbar|from=Q10798086}}

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

Finless porpoise - Revision history

Ajay Kumar at 21:33, 30 August 2023