https://twitter.com/Tomozaurus/status/1272656989022121984?s=19
The canon still refers to them as Mamenchisaurus (namely the DPG Chart), so yeah.
Also, is that a Mamenchisaurus maquette?
I wouldn't trust the DPG chart since it adds a bunch of other non canon species
@Dinosaurus1 YES. https://twitter.com/JurassicOutpost/status/1272530345087381506?s=19
"-Are you sure that this amber came from Sichuan?"
What do you think?