The Spotted Reptans is one of the species that can't be bred from other species. You will need to find the seed at the supply shop or use Mutation Liquid. There is a (spoiler) Seed Catalog in the Guides that will show you what seeds look like.

To get the Spotted Maranta cross a Spotted Astera and Spotted Maple. To get the Jalapa Maranta cross a Bluestar Astera and Fourpetal Maple.