Usually I test myself, looking at the banner image for a few hours off and on hoping I will figure it out. What was immediately obvious is that there was no reference for this one in my feeble brain. I cheated and looked at the answer.
Question please; I see that Rosa sericea is in the ATP database, but is your pteracantha represented? If not, please consider adding this "land shark" to the ATP database.
I finally used "land shark" in a sentence.