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Placentalia    
有胎盘类

有胎盘类

Placentalia \Plac`en*ta"li*a\, n. pl. [NL.] (Zool.)
A division of Mammalia including those that have a placenta,
or all the orders above the marsupials.
[1913 Webster]


Mammalia \Mam*ma"li*a\, n. pl. [NL., from L. mammalis. See
{Mammal}.] (Zool.)
The highest class of Vertebrata. The young are nourished for
a time by milk, or an analogous fluid, secreted by the
mammary glands of the mother.
[1913 Webster]

Note: Mammalia are divided into three subclasses;
[1913 Webster] I. {Placentalia}. This subclass embraces
all the higher orders, including man. In these the
fetus is attached to the uterus by a placenta.
[1913 Webster] II. {Marsupialia}. In these no placenta
is formed, and the young, which are born at an early
state of development, are carried for a time attached
to the teats, and usually protected by a marsupial
pouch. The opossum, kangaroo, wombat, and koala are
examples.
[1913 Webster] III. {Monotremata}. In this group, which
includes the genera {Echidna} and {Ornithorhynchus},
the female lays large eggs resembling those of a bird
or lizard, and the young, which are hatched like those
of birds, are nourished by a watery secretion from the
imperfectly developed mammae.
[1913 Webster]


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  • Placental: Características, Classificação, Reprodução
    Wikipedia (2018) Placentalia Recuperado de en wikipedia org Enciclopédia do Novo Mundo (2014) Placentalia Recuperado de newworldencyclopedia org Enciclopédia da Nova Palavra (2014) Eutheria Recuperado de newworldencyclopedia org Science Online (2014)
  • Placentalia (Placental mammals) | Humboldt Life | Lost Coast . . .
    Placentalia is one of the three extant subdivisions of the class of animals Mammalia; the other two are Monotremata and Marsupialia The placentals are partly distinguished from other mammals in
  • 真獣下綱 - Wikipedia
    真獣類が1880年にトマス・ヘンリー・ハクスリーによって導入されたとき、その語はそれまで使われていた有胎盤類 (Placentalia) よりも範囲が広くされ、冠系統としての有胎盤類と有袋類よりも有胎盤類に近い絶滅種群が含まれる。
  • Placentalia - Biquipedia, a enciclopedia libre
    Os placentarios (cientificament, en latín, Placentalia) son una infraclase de mamiferos adintro d'a subclase Theria Se caracterizan principalment porque as crías se desenvolican entre un largo periodo de tiempo en l'interior de l' utero materno, a on que son alimentadas a traviés d'una placenta alantoica
  • MAMMIFÈRES PLACENTAIRES – Classification, caractéristiques et . . .
    Ils se divisent en trois grands groupes: les Metatheria (marsupiaux), où l'on trouve des kangourous parmi les différents types de marsupiaux, les Protothheria (monotrèmes), groupe auquel appartiennent les ornithorynques et autres mammifères pondeurs, et les Placentalia (placentaires)
  • Placentalia - Wikiwand
    Los placentarios (Placentalia) son una infraclase de mamíferos que se caracterizan porque las crías son retenidas en el útero materno durante largo tiempo donde
  • Mamíferos placentarios: tipos y características - Mis animales
    Insectivora Aunque su nombre haga suponer que este orden está relacionado con los insectos, esto solo es así en cierta manera En realidad, Insectivora es un orden en desuso, formado por más de 400 especies distintas de mamíferos placentarios que no casaban en ningún otro grupo, pero compartían ciertas características
  • placentals - Wikidata
    infraclass of eutherian mammals This page was last edited on 2 May 2025, at 00:14 All structured data from the main, Property, Lexeme, and EntitySchema namespaces is available under the Creative Commons CC0 License; text in the other namespaces is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply
  • Placentāļi — Vikipēdija
    Placentāļi, placentāļu infraklase (Eutheria) ir viena no zīdītāju klases (Mammalia) infraklasēm, kas pieder dzemdētājzīdītāju apakšklasei (Theria) Šajā infraklasē apvienoti visi mūsdienu zīdītāji - placentāļi, kā arī visi izmirušie zīdītāji, kas ir tuvāki savā uzbūvē mūsdienu placentāļiem, nekā somaiņiem
  • Placentalia - Wiktionary, the free dictionary
    Placentalia The clade originating with the last common ancestor of extant eutherians A taxonomic subclass within the class Mammalia





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