Considering that mantids can change colors to match their natural background through molts, I don't know if there is such thing as an albino mantid. My only guess is that if a mantid species is incapable of turning white (as one of the possible natural colors it can become), then it would be considered albino. I know that albinos occur in other wildlife species but I have yet to see one for mantids.
No, this is a D. trigonodera nymph. Almost all specimens in captivity show this pale color, I didn't figure out yet why. Mantids can change color due to molts and in the past I repeatedly managed to get dark or beige D. lobata and desiccata by changing the surroundings, but not with this species. Regardless what I do, all captive specimens are light beige, which is stunning, as the WC ones were mostly reddish-brown, similar to the one seen on flickr.