As was noted by Norbert Bahr
here, the paper describing
chaski was initially (13 May) issued without evidence of registration in ZooBank.
PNAS is online-only, hence this was problematic.
This seems to have been quickly corrected, though. (The work was
registered on 14 May and a new pdf containing the registration data was apparently uploaded (17 May as per ZooBank) in replacement of the first one. This new pdf can be viewed as published for the purposes of nomenclature. It still claims to have been published on 13 May, though.) So this concern, at least, seems to have been remedied.