Tuskes et al. 1996 in "The Wild Silk Moths of North America" were the last authors to reinstate Sphingicampa as a valid genus, different from Syssphinx (type species S. molina). It seems that most researchers (Brechlin & Meister 2014, Naumann et al. 2015) describing new Neotropical species of Syssphinx/Sphingicampa have ignored this change, placing recently described species in Syssphinx. Most recently Kitching & Rougerie et al. (2018) treated Sphingicampa as a synonym of Syssphinx. So, for right now that is the taxonomy as it stands. Surely this issue is not solved and until the type species of both Syssphinx and Sphingicampa (and many other species of Syssphinx/Sphingicampa) are studied in a phylogenetic context, we cannot recognize Sphingicampa as valid on iNaturalist.
Kitching I, Rougerie R, Zwick A, Hamilton C, St Laurent R, Naumann S, Ballesteros Mejia L, Kawahara A (2018) A global checklist of the Bombycoidea (Insecta: Lepidoptera). Biodiversity Data Journal 6: e22236.
https://doi.org/10.3897/BDJ.6.e22236 (Link)
Unintended disagreements occur when a parent (B) is
thinned by swapping a child (E) to another part of the
taxonomic tree, resulting in existing IDs of the parent being interpreted
as disagreements with existing IDs of the swapped child.
Identification
ID 2 of taxon E will be an unintended disagreement with ID 1 of taxon B after the taxon swap
If thinning a parent results in more than 10 unintended disagreements, you
should split the parent after swapping the child to replace existing IDs
of the parent (B) with IDs that don't disagree.