Corybantes pylades was created in 1782.

Yes, she married Pylades.

The accepted scientific name is Thorybes pylades.

Orestes and his friend, Pylades, went to the palace and claimed to bear a message that Orestes was dead.

Yes.

Orestes wavers about killing his own mother, but is guided by Apollo and his close friend Pylades, the son of the king of Phocis, that it is the correct course of action. Orestes and Pylades pretend to be ordinary travelers from Phocis, and ask for hospitality at the palace. They even tell the Queen that Orestes is dead. Delighted by the news, Clytemnestra sends a servant to summon Aegisthus. Orestes kills the usurper first, and then his mother. As soon as he exits the palace, the Furies appear and, being only visible to him, they begin to haunt and torture him for his crime.