What do different schools of Buddhism say about Mara Does the concept of "Mara Devaputta" (The being called Mara) exist in all schools of Buddhism?

What is mentioned about that concept?
Mara , according to the specific Buddhist and Hindu Cosmology, is the leader of the heaven above Sakra, prince of the Devas (see The Thirty-one Planes of Existence).

According to Wikipedia's Mara (demon) article:


  In Mahayana Buddhism. There are traditionally 
  these four types of Mara
  In traditional Buddhism, four metaphorical forms of "māra" are given:
  
  
  Kleśa-māra, or Ma̋ra as the embodiment of all unskillful emotions, such as greed, hate and delusion.
  Mṛtyu-māra, or Māra as death.
  Skandha-māra, or Māra as metaphor for the entirety of conditioned existence.
  Devaputra-māra, the deva of the sensuous realm, who tries to prevent Gautama Buddha from attaining liberation from the cycle of rebirth on the night of the Buddha´s enlightenment.
  


This Devaputra Mara is, according to Buddhists, a real sentient being.
He is destined to become a  Pratyeka Buddha. His followers might not be so fortunate.





The above image quoted from The Thirty-one Planes of Existence. Note especially:


  
  Realm: 11) Devas Wielding Power over the Creation of Others (paranimmita-vasavatti deva)
  Comments: These devas enjoy sense pleasures created by others for them. Mara, the personification of delusion and desire, lives here.
  Cause of rebirth here:
  
  
  Ten wholesome actions (MN 41)
  Generosity