Arwidsson (1906:104) separated his subgenus Loxochona from the nominal genus because of the slightly oblique ... [details]
Genus uncertain. Reported (De Assis et al. 2007) to be known only from an anterior fragment. [details]
Indeterminable as is a tail fragment (fide De Assis et al, 2007), but possibly a synonym of Petaloproctus tenuis [details]
taxon inquirendum as known only from a fragment (De Assis et al. 2007) [details]