I believe this species is closely related to the spiny flower, as I often see them grouped together when being sold, so I believe it's closer to the spiny flower mantis.
T elegans are a rarer breed than hymenopus. Theopropus can develop pink too. The main commonality both species share are their sexual dimorphism which make them both hard to breed being the males are only a third the size of the females. The main difference between theopropus and hymenopus is their mortality rates as nymphs. Theo females are like big creos. The males are like mini creos. And they are not easier to rear to adulthood than hymenopus unfortunately..