# Placentarios

| Wikipedia:Uso de taxobox**Placentalia**
Rango fossile: Paleoceno-Holoceno forsan Cretaceo |
| --- |
|  Placentarios de differente ordines. |
| **Classification scientific** |
|

|  |  |
| --- | --- |
| Regno: | Animalia  |
| Phylo: | Chordata  |
| Classe: | Mammalia  |
| Subclasse: | Theria  |
| (sin rango) | Eutheria  |

 |
| Infraclasse |
| **Placentalia** Owen, 1837 |
| Subdivision |
| * Atlantogenata
	+ Xenarthra
	+ Afrotheria
* Boreoeutheria
	+ Euarchontoglires
	+ Laurasiatheria
 |

**Placentarios** (*Placentalia*) forma un del tres subdivisiones del mammiferos actual; le altere duo son monotremas e marsupiales. Le placentarios se distingue de altere mammiferos principalmente in que le feto es portate in le utero de su matre ubi illo recipe nutrition per un placenta usque al nascentia.

## Classification

### Rango taxonomic

* infraclass
* cohorte

### Supertaxones

* Eutheria: Placentarios + lor cippo gruppo (extincte species plus proxime del placentarios que del marsupiales)

### Subtaxones

* Superlegion o Magnordine Atlantogenata
	+ Legion o Superordine Xenarthra
		- Ordine Cingulata
		- Ordine Pilosa
	+ Legion o Superordine Afrotheria
		- Sublegion o Grandordine Afroinsectiphilia
			* Ordine Afrosoricida
			* Ordine Macroscelidea
			* Ordine Tubulidentata
		- Sublegion o Grandordine Paenungulata
			* Ordine Hyracoidea
			* Ordine Proboscidea
			* Ordine Sirenia
* Superlegion o Magnordine Boreoeutheria
	+ Legion o Superordine Euarchontoglires
		- Sublegion o Grandordine Gliriformes
			* Mirordine Glires
				+ Ordine Lagomorpha
				+ Ordine Rodentia
		- Sublegion o Grandordine Euarchonta
			* Ordine Scandentia
			* Mirordine Primatomorpha
				+ Ordine Dermoptera
				+ Ordine Primates
	+ Legion o Superordine Laurasiatheria
		- Sublegion o Grandordine Eulipotyphla
			* Ordine Solenodonota
			* Ordine Erinaceota
		- Sublegion Scrotifera
			* Ordine Chiroptera
			* Ordine Cetartiodactyla
			* Ordine Perissodactyla
			* Ordine Pholidota
			* Ordine Carnivora

## Phylogenia

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| Mammalia  |

|  |  |
| --- | --- |
|  |  Monotremata  |
|  |
|  Theria  |

|  |  |
| --- | --- |
|  |  Marsupialia  |
|  |
|  Placentalia  |

|  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- |
|  Atlantogenata  |

|  |  |
| --- | --- |
|  |  Xenarthra   |
|  |
|  |  Afrotheria   |
|  |

 |
|  |
| Boreoeutheria |

|  |  |
| --- | --- |
|  |  Euarchontoglires   |
|  |
|  |  Laurasiatheria    |
|  |

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|  |

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|  |

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## Historia evolutive

Fossiles de placentarios son posterior al exinction Cretaceo-Paleogeno (extinction del dinosauros non-avee qui occurreva 66 Ma retro), ma analyses indica que le diversication del placentarios in Boreoeutheria e Atlantogenata occurreva durante le Cretaceo (circa 105±15 Ma retro). Le prime gruppos de Placentarios resulta del continental fragmentation durante le Cretaceo. Le division del Atlantogenata (circa 94 Ma) traduce le distaccamento del Africa del Sud America (circa 110 Ma) e su isolamento territorial. Le diversification del ordines intra Laurasiatheria (inter 82 e 73 Ma) es associate al maximum de fragmentation territorial causate per le alto nivello del mar (circa de 97 a 75 Ma).

## Vide etiam

* Marsupiales
* Eutheria
	+ Juramaia

## Notas et referentias

### Notas

### Referentias