Rat
Rat. Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most well known.
Dec 16, 2015
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Rats are various medium-sized, long-tailed rodents of the superfamily Muroidea. "True rats" are members of the genus Rattus, the most well known are the black rat, Rattus rattus, and the brown rat, Rattus norvegicus.
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Rodentia
Superfamily: Muroidea
Family: Muridae
Subfamily: Murinae
Genus:
Rattus
Fischer de
Waldheim
Classification
The brown rat also known as the common rat, originated from China is Widespread across all continents except Antarctica. This rat is the dominant rat in most of Europe and North America.The black rat is a common long tailed rodent, thought to originate in tropical Asia. It is largely confined to warmer areas having been supplanted from cooler regions and urban areas by the brown rat. Both brown rats and Black rats are considered omnivores and eat a wide range of foods, including seeds, fruit, stems, leaves, fungi, and a variety of invertebrates and vertebrates. They can breed throughout the year if conditions are suitable, a female producing up to five litters a year. The gestation period is only 21 days and litters can number up to fourteen, although seven is common. They reach sexual maturity in about 5 weeks. The maximum life span is up to three years, although most barely manage one.
http://en.wikipedia.org/wiki/Black_rat http://en.wikipedia.org/wiki/Brown_rat
1. Temporal bone2. Zygomatic bone3. Zygomatic process frontal bone4. Frontal bone5. Nasal bone6. Premaxilla
7. Maxilla8. Upper Insisor9. Lower incisor10. Three upper molars11. Three lower molars12. Mandible13. Zygomatic process temporal bone
14. Tympanic bulla15. External auditory meatus
16. Mastoid process17. Occipital condyle18. Occipital bone19. Interparietal bone
1. 2.3. 4. 5.
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14.13.
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10. 9. 8.
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1. Occipital bone
2. Interparietal
3. Tympanic bulla
4. Interaural line
5. Temporal bone
6. Bregma
7. Frontal bone
8. Zygomatic arch
9. Premaxilla bone
10. Nasal bone
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1. Occipital condyle
2. Bulla
3. Basioccipital
4. Eustachian tube
5. Basisphenoid
6. Palatine
7. Jugal
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