| 词条 | Takikawa sea cow |
| 释义 |
| fossil_range = Late Pliocene {{Fossil range|3.6|2.6}} | name = Takikawa sea cow | regnum = Animalia | phylum = Chordata | classis = Mammalia | ordo = Sirenia | familia = Dugongidae | subfamilia = †Hydrodamalinae | genus = †Hydrodamalis | species = †H. spissa | species_authority = Furusawa, 1988 | synonyms = ?†H. cuestae Domning, 1978 }} The Takikawa sea cow (Hydrodamalis spissa) is an extinct herbivorous marine mammal of the Late Pliocene, which was closely related to the recently extinct Steller's sea cow (H. gigas). In 1988, fossils of sea cows were discovered in Hokkaido, but were originally assigned to the Takikawa sea cow,[1] a newly described species, even though this taxon is thought of by some scientists as a synonym of the Cuesta sea cow (H. cuestae). It is uncertain whether or not the Takikawa sea cow was simply a local variant of the Cuesta sea cow or a completely separate lineage.[1][2][3] However, Steller's sea cow and the Takikawa sea cow share more morphological similarities than between the Takikawa sea cow and the Cuesta sea cow.[5] {{Cladogram|align=left|title=Relations within Sirenia|caption=Based on a 2004 study by Hitoshi Furusawa[4]|cladogram={{clade|style=font-size:100%;line-height:100% |label1=Sirenia |1={{clade |1={{clade |label1=Dugongidae |1={{clade |1={{clade |label1=†Halitherium |1={{clade |1=†H. schinzii |2=†H. alleni }} |2={{clade |1={{clade |label1=†Dusisiren |1={{clade |1=†D. jordani |2=†D. reinharti |3=†D. dewana |4=†D. takasatensis }} }} |3={{clade |label1=†Hydrodamalis |1={{clade |1=†H. gigas |2={{clade |1=†H. cuestae |2=†H. spissa }} }} }} }} }} |2={{clade |label1=Dugong |1={{clade |1=Dugong dugon }} }} }} }} |2={{clade |1={{clade |label1=Trichechidae |1={{clade |label1=Trichechus |1={{clade |1=Trichechus inunguis |2=Trichechus manatus |3=Trichechus senegalensis }} }} }} }} }} }} }} References1. ^1 {{cite book|last=Furusawa|first=Hitoshi|year=1988|title=A new species of hydrodamaline Sirenia from Hokkaido, Japan|publisher= Takikawa Museum of Art and Natural History|pages=1–73}} {{Paleo-mammal-stub}}2. ^{{cite book|url={{Google books|plainurl=yes|id=7pQgAwAAQBAJ|page=76}}|first=Helene|last=Marsh|first2=Thomas J.|last2=O'Shea|first3=John E. |last3=Reynolds III|year=2011|title=Ecology and Conservation of the Sirenia: Dugongs and Manatees|chapter=Steller's sea cow: discovery, biology and exploitation of a relict giant sirenian|publisher=Cambridge University Press |location=New York|pages=18–35|ISBN=978-0-521-88828-8}} 3. ^{{cite journal|first=Hitoshi|last=Furusawa|year=1990|title=Discovery and significance of the Takikawa sea cow (Hydrodamalis spissa) from Numata-cho, Uryu-gun, Hokkaido, Japan|journal=Earth Science|volume=44|issue=4|pages=224–228}} 4. ^1 {{cite journal|url=http://www.bioone.org/doi/full/10.2517/prpsj.8.91|first=Hitoshi|last=Furusawa|year=2004|title=A phylogeny of the North Pacific Sirenia (Dugongidae: Hydrodamalinae) based on a comparative study of endocranial casts|journal=Paleontological Research|volume=8|number=2|pages=91–98|doi=10.2517/prpsj.8.91}} 3 : Pliocene sirenians|Pliocene mammals of Asia|Fossil taxa described in 1988 |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。