substitute for ancho chili powder
The raw jalepeno is completely different. In case you aren't familiar with ancho, it is sort of like a spicy raisin. It is a dried poblano chile which is far milder (as well as sweeter and smokier than a fresh jalepeno). Since I don't know the recipe it would be difficult to know if the substitution would work. I would use a ground dried chile though (maybe a chipotle with a little honey) if you have any.