A cyprid larva is the larval stage of a barnacle. Barnacles are sessile filter feeders meaning they are attached to a surface and filter food from the water.

Barnacles are hermaphroditic. This means they have both male and female reproductive organs.

Therefore, a cyprid larva is neither hetero nor auto. It is a larval stage of a hermaphroditic organism. The concept of hetero/auto applies to sexual reproduction, which the cyprid larva has not yet undergone.