In my JIRA project, I created Epics and Tasks, and can set a task parent to an epic. I originally deleted the Subtask type, but re-added it in Project Settings. When I create a new task, the Subtask type is not listed in the Issue type pull-down. Task, Epic, Story, Bug are there but not Subtask. I have way less than 500 issues in this project so that should be ok. Any ideas?